How to Write Scientific Explanations | Advanced Science Tutorials

How to write scientific explanations is a different problem from simply knowing the right fact. A scientific explanation must answer the question, use relevant evidence and make the reasoning visible. Students often lose marks because one of those pieces is missing: the claim is vague, the evidence is copied without interpretation, or the reasoning jumps from observation to conclusion without explaining the scientific mechanism. The result can contain correct vocabulary while still failing to explain.

This Advanced Science Tutorials guide is written for parents and students in Sengkang, Punggol and across Singapore who search for scientific explanation, claim evidence reasoning, CER Science, how to write a Science explanation, Science open-ended questions, evidence-based explanation, how to explain in Science and scientific argument. It builds explanation writing from Primary Science through PSLE and Secondary G1, G2 and G3.

NSTA describes claim, evidence and reasoning as a framework that can help students move beyond simple answers: the claim answers the question, the evidence supports the claim using observations or data, and the reasoning applies scientific ideas to explain why that evidence supports the claim. NSTA also cautions that explanation should remain open to contrary evidence and alternative explanations rather than becoming a one-sided exercise in defending an initial answer. See NSTA: Helping Students Write Scientific Explanations, NSTA: Supporting Students in Writing Scientific Explanations, and NSTA: Teaching Claims–Evidence–Reasoning.

The scientific-explanation architecture

Question: what exactly must be explained?
Claim: what answer or relationship are you proposing?
Evidence: what observation, measurement, graph, table or result supports the claim?
Reasoning: what scientific concept or mechanism explains why the evidence supports the claim?
Qualification: under what conditions does the explanation apply?
Alternative: what other explanation could fit, and what evidence distinguishes it?
Conclusion: state the explanation at the strength the evidence permits.

Primary 1 and Primary 2: oral explanation first

Young learners can explain using “I think… because I observed…” without formal CER labels. The important habit is that the reason should connect to evidence rather than simply repeat the conclusion.

Parents can ask, “What makes you think that?” and “What did you notice?” before offering the adult explanation.

Primary 3 and Primary 4: complete the missing middle

Primary Science learners often state the condition and result but omit the mechanism. “The metal spoon became hot because it was in hot soup” restates the setup. A stronger answer makes the transfer process visible.

The useful prompt is: “What happened in between?”

Primary 5 and Primary 6: evidence plus mechanism

Older Primary learners should connect diagrams, experiment results and data to scientific concepts. In PSLE open-ended questions, evidence may be embedded in an unfamiliar setup. The student must select only what supports the answer and avoid adding irrelevant textbook facts.

Use Primary 6 Open-Ended Questions for the level-specific examination route.

Secondary G1, G2 and G3: explanation becomes more analytical

Lower Secondary Science expects increasingly explicit use of models, equations, graphs, practical evidence and quantitative relationships. Explanations should distinguish observation from interpretation and should become more careful about scope, uncertainty and alternative explanations.

A strong Secondary explanation often links multiple representations: data → model → mechanism → conclusion.

Question reading

Explanation principle. The explanation begins with the exact task, not the topic in general.

Common failure. Students write everything they know about the chapter.

Better writing move. Translate the command word and target into one sentence.

Question to ask. What must the final sentence answer?

Practice task. Underline command, object and condition.

The explanation-quality test is whether a reader can trace the path from evidence to claim without filling in an unstated scientific step. If the answer depends on the examiner guessing what the student meant, the reasoning is still incomplete.

Claim

Explanation principle. A claim is the direct answer or relationship proposed.

Common failure. Students write vague claims such as ‘it changes’.

Better writing move. Name the object, direction or conclusion clearly.

Question to ask. Could the claim stand alone as an answer?

Practice task. Rewrite vague claims precisely.

Evidence

Explanation principle. Evidence is data, observation or information that supports the claim.

Common failure. Students use any true fact as evidence.

Better writing move. Select evidence that directly bears on the claim.

Question to ask. What would make the claim more or less believable?

Practice task. Choose the strongest evidence from a table.

Reasoning

Explanation principle. Reasoning is the scientific bridge between evidence and claim.

Common failure. Students repeat the evidence instead of explaining it.

Better writing move. Apply a relevant concept, model or mechanism.

Question to ask. Why does this evidence support this claim?

Practice task. Write one reasoning sentence.

Rebuttal

Explanation principle. A rebuttal addresses plausible alternatives or contrary evidence where appropriate.

Common failure. Students defend the claim at all costs.

Better writing move. Acknowledge alternative explanations and explain why the evidence favours one.

Question to ask. What else could explain the result?

Practice task. Add one alternative and response.

Observation

Explanation principle. Observation states what was seen or measured.

Common failure. Students mix observation with cause.

Better writing move. Write the direct result before interpreting it.

Question to ask. Could another observer verify this?

Practice task. Separate observation and explanation.

Inference

Explanation principle. Inference draws a conclusion from evidence and prior knowledge.

Common failure. Students present inference as direct observation.

Better writing move. Use calibrated wording.

Question to ask. What evidence supports the inference?

Practice task. Write observation → inference pair.

Mechanism

Explanation principle. Mechanism explains the intermediate process connecting cause to effect.

Common failure. Students jump from cause to outcome.

Better writing move. Write condition → process → effect.

Question to ask. What happens in the middle?

Practice task. Build a three-step chain.

Condition

Explanation principle. Conditions specify when the explanation applies.

Common failure. Students give a general fact and ignore the setup.

Better writing move. State the relevant temperature, connection, environment or treatment.

Question to ask. Which condition changes the answer?

Practice task. Add condition to a generic explanation.

Comparison

Explanation principle. Comparative explanations need the same property across cases.

Common failure. Students describe A and B separately.

Better writing move. Use a shared dimension and explain the difference.

Question to ask. What property is being compared?

Practice task. Write a matched comparison.

Cause

Explanation principle. Causal explanation identifies a factor that contributes to an effect.

Common failure. Students infer cause from sequence alone.

Better writing move. Link causal claims to controlled evidence or established mechanism.

Question to ask. What alternative causes were ruled out?

Practice task. Compare causal and correlational wording.

Correlation

Explanation principle. Correlational evidence shows association, not necessarily cause.

Common failure. Students use causal verbs for observational data.

Better writing move. Use associated with or linked to unless stronger evidence exists.

Question to ask. Could a third variable explain the pattern?

Practice task. Rewrite overcausal sentences.

Prediction

Explanation principle. A prediction states what should happen under a model.

Common failure. Students state a guess without mechanism.

Better writing move. Connect prediction to a scientific relationship.

Question to ask. Why should this outcome occur?

Practice task. Write prediction + reason.

Explanation versus description

Explanation principle. Description says what happened; explanation says why.

Common failure. Students provide only trend language for an explain question.

Better writing move. Add the mechanism after the evidence.

Question to ask. What caused the described pattern?

Practice task. Turn descriptions into explanations.

Explanation versus definition

Explanation principle. Definitions state meaning; explanations connect cause and effect.

Common failure. Students answer why questions with definitions.

Better writing move. Use definitions only as building blocks.

Question to ask. What relationship must the definition help explain?

Practice task. Upgrade a definition-only answer.

Explanation versus example

Explanation principle. Examples illustrate but do not necessarily explain.

Common failure. Students give one example instead of mechanism.

Better writing move. State the rule first, then use example if helpful.

Question to ask. Would the answer still explain another case?

Practice task. Replace example-only answer with general mechanism.

Evidence versus reasoning

Explanation principle. Evidence tells what happened; reasoning tells why it matters.

Common failure. Students merge them into one vague sentence.

Better writing move. Separate the data sentence from the scientific principle.

Question to ask. Which words come from the experiment and which from Science knowledge?

Practice task. Colour-code a sample answer conceptually.

Relevant evidence

Explanation principle. Relevant evidence changes confidence in the claim.

Common failure. Students include all data from the table.

Better writing move. Choose only values that test the relationship.

Question to ask. Which rows or points matter?

Practice task. Remove irrelevant evidence.

Sufficient evidence

Explanation principle. Sufficient evidence provides enough support for the claim’s scope.

Common failure. Students use one weak observation for a broad conclusion.

Better writing move. Match amount and quality of evidence to claim strength.

Question to ask. Does this evidence justify ‘always’?

Practice task. Narrow the claim or add evidence.

Quantitative evidence

Explanation principle. Numbers can make support more precise.

Common failure. Students say ‘more’ when exact values are available.

Better writing move. Use relevant values and units when helpful.

Question to ask. Which numbers make the comparison clear?

Practice task. Add two values to a claim.

Qualitative evidence

Explanation principle. Non-numerical observations can still be scientifically relevant.

Common failure. Students dismiss observations because they lack numbers.

Better writing move. Use defined categories and controlled observation.

Question to ask. What feature was observed consistently?

Practice task. Write evidence from an image or specimen.

Graph evidence

Explanation principle. Graphs require axes, units and trend before interpretation.

Common failure. Students use expected theory instead of actual data.

Better writing move. Describe the graph first.

Question to ask. What pattern is visible?

Practice task. Write evidence from a graph.

Table evidence

Explanation principle. Tables require matched conditions.

Common failure. Students compare values from different treatments or times.

Better writing move. Select like-for-like data.

Question to ask. Which cells form the valid comparison?

Practice task. Write a table-based evidence sentence.

Diagram evidence

Explanation principle. Diagrams can encode structural or process evidence.

Common failure. Students assume arrows or colours are literal.

Better writing move. Interpret the convention before reasoning.

Question to ask. What does the symbol represent?

Practice task. Use one labelled feature as evidence.

Experimental evidence

Explanation principle. Experiment evidence depends on variables and controls.

Common failure. Students cite a result without checking fairness.

Better writing move. State the tested change and measured outcome.

Question to ask. Was the comparison controlled?

Practice task. Write evidence with condition.

Model evidence

Explanation principle. Models help explain evidence but are not themselves always observations.

Common failure. Students use model as if it were raw data.

Better writing move. Distinguish model prediction from empirical observation.

Question to ask. What measurement tests the model?

Practice task. Write model + evidence pair.

Scientific principle

Explanation principle. A principle provides the accepted scientific relationship used in reasoning.

Common failure. Students insert vocabulary without linking it to data.

Better writing move. State the principle in a way that directly explains the evidence.

Question to ask. Which concept bridges evidence and claim?

Practice task. Write one principle sentence.

Cause-process-effect

Explanation principle. This structure makes mechanisms visible.

Common failure. Students omit the process.

Better writing move. Write cause → process → effect in one or more sentences.

Question to ask. What happens in between?

Practice task. Build a compact mechanism.

Structure-function

Explanation principle. Biology explanations often connect structure to function.

Common failure. Students name a structure but do not explain advantage.

Better writing move. State how a feature enables a process.

Question to ask. How does shape or arrangement support function?

Practice task. Explain root hair or red blood cell examples.

Particle explanation

Explanation principle. Chemistry explanations often require particle-level reasoning.

Common failure. Students describe macroscopic observation only.

Better writing move. Link particle spacing, motion or rearrangement to the observed effect.

Question to ask. What are particles doing?

Practice task. Explain dissolving or state change.

Force explanation

Explanation principle. Physics explanations require interaction, direction and effect.

Common failure. Students name gravity or friction only.

Better writing move. State which force acts and how motion changes.

Question to ask. Force on what, by what?

Practice task. Write one force-based explanation.

Energy explanation

Explanation principle. Energy explanations track transfer and transformation.

Common failure. Students write ‘energy is used up’.

Better writing move. Name starting form/store, transfer and resulting effect.

Question to ask. Where did the energy go?

Practice task. Explain a bouncing ball or device.

Circuit explanation

Explanation principle. Circuit explanations depend on connectivity and electrical quantities.

Common failure. Students rely on visual layout.

Better writing move. Trace path and component relationships.

Question to ask. What complete path exists?

Practice task. Explain why a bulb lights.

Heat explanation

Explanation principle. Thermal explanations need direction and mechanism.

Common failure. Students confuse heat with temperature.

Better writing move. State temperature difference and energy transfer.

Question to ask. From where to where does energy move?

Practice task. Explain insulation.

Ecosystem explanation

Explanation principle. Ecosystem explanations trace direct and indirect relationships.

Common failure. Students write ‘everything changes’.

Better writing move. Follow one pathway at a time.

Question to ask. Which population changes first?

Practice task. Explain one food-web effect.

Earth-system explanation

Explanation principle. Earth Science explanations often require stores, flows and timescales.

Common failure. Students describe cycle diagrams without mechanism.

Better writing move. Track matter or energy among reservoirs.

Question to ask. What moves and what drives it?

Practice task. Explain evaporation or erosion.

Astronomy explanation

Explanation principle. Astronomy explanations connect remote evidence to physical models.

Common failure. Students rely on images without measurement logic.

Better writing move. State what was observed and what model explains it.

Question to ask. What signal was measured?

Practice task. Explain exoplanet transit evidence.

Equation explanation

Explanation principle. Equations can support reasoning when symbols are interpreted.

Common failure. Students insert formulas without meaning.

Better writing move. Explain the relationship qualitatively first.

Question to ask. What happens when one quantity changes?

Practice task. Explain one formula in words.

Unit explanation

Explanation principle. Units help show what quantity is being discussed.

Common failure. Students use correct number with wrong scientific meaning.

Better writing move. Use units to identify and check the quantity.

Question to ask. What does this unit measure?

Practice task. Repair a unit-mismatched answer.

Uncertainty

Explanation principle. Strong explanations acknowledge measurement and scope limits when relevant.

Common failure. Students overstate precision.

Better writing move. Use calibrated wording and limits.

Question to ask. What remains uncertain?

Practice task. Add one limitation to a conclusion.

Alternative explanation

Explanation principle. Alternative explanations prevent confirmation bias.

Common failure. Students treat first answer as the only possible one.

Better writing move. Generate another mechanism and compare predictions.

Question to ask. What evidence would distinguish them?

Practice task. Write two competing explanations.

Counterevidence

Explanation principle. Evidence against a claim should be addressed, not hidden.

Common failure. Students cherry-pick supporting data.

Better writing move. State the conflicting observation and explain whether it weakens or changes the conclusion.

Question to ask. Does this anomaly matter?

Practice task. Revise claim after counterevidence.

Scope

Explanation principle. Scope defines the population, condition or range covered by the explanation.

Common failure. Students universalise from one experiment.

Better writing move. Keep wording inside tested conditions.

Question to ask. Who or what does the claim apply to?

Practice task. Replace ‘always’ with calibrated scope.

Qualifier

Explanation principle. Words such as generally, under these conditions and may can make explanations scientifically accurate.

Common failure. Students think qualifiers make answers weak.

Better writing move. Use them when evidence does not justify absolutes.

Question to ask. What strength of language fits the evidence?

Practice task. Rewrite an absolute claim.

Scientific vocabulary

Explanation principle. Precise terms improve explanation when they name the mechanism.

Common failure. Students insert keywords without relationships.

Better writing move. Use vocabulary after the logic is clear.

Question to ask. Which term makes this process more precise?

Practice task. Replace vague verbs.

Plain-language explanation

Explanation principle. Simple language can reveal understanding before technical refinement.

Common failure. Students hide confusion behind memorised terminology.

Better writing move. Explain in ordinary language, then add required terms.

Question to ask. Can a younger student follow the causal chain?

Practice task. Write simple then technical versions.

Sentence linking

Explanation principle. Connectives can make causal and contrast relationships explicit.

Common failure. Students write disconnected sentences.

Better writing move. Use because, therefore, whereas, as a result or however appropriately.

Question to ask. What relation links these sentences?

Practice task. Join two fragments.

Pronoun clarity

Explanation principle. Scientific explanations often contain several possible referents.

Common failure. Students write it, they or this ambiguously.

Better writing move. Repeat the scientific noun when needed.

Question to ask. What does ‘it’ refer to?

Practice task. Edit ambiguous pronouns.

Answer economy

Explanation principle. Good explanations are complete without unnecessary chapter summaries.

Common failure. Students over-answer and introduce contradictions.

Better writing move. Stop when claim, evidence and reasoning are complete.

Question to ask. What sentence is no longer doing work?

Practice task. Cut one redundant sentence.

Mark-value calibration

Explanation principle. Exam marks can indicate expected number of distinct ideas.

Common failure. Students write one fragment for a multi-mark explanation or an essay for one mark.

Better writing move. Use marks as a rough scope cue within school conventions.

Question to ask. How many relationships are likely required?

Practice task. Compare 1-mark and 3-mark answers.

Planning before writing

Explanation principle. A short plan can prevent irrelevant prose.

Common failure. Students start writing before selecting evidence.

Better writing move. Note claim, evidence and mechanism first.

Question to ask. What three elements must appear?

Practice task. Use a 10-second plan.

CER planner

Explanation principle. A three-column planner separates claim, evidence and reasoning.

Common failure. Students mix components.

Better writing move. Fill columns before prose.

Question to ask. Which column is weakest?

Practice task. Plan one open-ended answer.

Evidence ranking

Explanation principle. Not all evidence is equally persuasive.

Common failure. Students include weak and strong evidence without distinction.

Better writing move. Choose the most direct, controlled or relevant evidence first.

Question to ask. Which observation most strongly supports the claim?

Practice task. Rank three evidence pieces.

Reasoning depth

Explanation principle. Reasoning should match the complexity of the question.

Common failure. Students either give a slogan or overcomplicate.

Better writing move. Use enough scientific steps to connect evidence to claim.

Question to ask. Which intermediate step is essential?

Practice task. Add one missing mechanism.

Multi-step explanation

Explanation principle. Some questions require chains across several processes.

Common failure. Students compress the chain until logic disappears.

Better writing move. Write each causal link, then combine if possible.

Question to ask. Where could the chain break?

Practice task. Build a four-step explanation.

Comparative explanation

Explanation principle. A comparison explanation must say why A differs from B.

Common failure. Students provide two separate mechanisms without direct comparison.

Better writing move. State the relevant difference and its consequence.

Question to ask. What condition differs between cases?

Practice task. Write one comparative mechanism.

Change-over-time explanation

Explanation principle. Time-series explanations should distinguish pattern from cause.

Common failure. Students infer cause from timing only.

Better writing move. Describe temporal evidence then use mechanism cautiously.

Question to ask. What changed before, during and after?

Practice task. Explain one trend.

Experimental conclusion

Explanation principle. A conclusion should answer the tested question without exceeding evidence.

Common failure. Students write that the experiment ‘proved’ the hypothesis.

Better writing move. Use supported/not supported under conditions.

Question to ask. What range was actually tested?

Practice task. Rewrite conclusion.

Scientific argument

Explanation principle. Argument weighs evidence for and against explanations.

Common failure. Students think argument means asserting one side.

Better writing move. Compare claims, evidence quality and alternatives.

Question to ask. Which explanation better fits all evidence?

Practice task. Write a brief comparative argument.

Rebuttal sentence

Explanation principle. A rebuttal addresses a reasonable alternative.

Common failure. Students ignore counterclaims.

Better writing move. State alternative then explain why evidence favours current conclusion.

Question to ask. What evidence rules out the alternative?

Practice task. Add rebuttal to CER.

Model-answer analysis

Explanation principle. Model answers can reveal structure if analysed, not memorised.

Common failure. Students copy wording.

Better writing move. Label claim, evidence, reasoning and mechanism.

Question to ask. What makes the answer complete?

Practice task. Annotate a model answer.

Weak-answer analysis

Explanation principle. Flawed answers reveal missing components.

Common failure. Students only study correct examples.

Better writing move. Find the first missing or wrong element.

Question to ask. Is claim, evidence or reasoning weak?

Practice task. Repair a weak answer.

Peer critique

Explanation principle. Students can improve by evaluating anonymous explanations.

Common failure. Students critique grammar instead of Science.

Better writing move. Use explanation criteria.

Question to ask. Does claim answer, evidence support and reasoning connect?

Practice task. Score a sample response.

Self-check

Explanation principle. Writers should evaluate their own explanation before submission.

Common failure. Students reread for spelling only.

Better writing move. Check claim, evidence, reasoning, condition and contradiction.

Question to ask. Could another reader follow the mechanism?

Practice task. Use a five-point checklist.

Revision

Explanation principle. Scientific writing improves through substantive revision, not just proofreading.

Common failure. Students change words without changing reasoning.

Better writing move. Add missing evidence or mechanism.

Question to ask. What scientific idea is still implicit?

Practice task. Revise after feedback.

Delayed rewrite

Explanation principle. Rewriting later tests whether explanation structure was learned.

Common failure. Students can revise only with model answer present.

Better writing move. Return after a delay with a changed scenario.

Question to ask. Can you rebuild the explanation independently?

Practice task. Write a second version next week.

Primary oral explanation

Explanation principle. Young learners can speak claim and evidence before formal writing.

Common failure. Students struggle because writing load hides Science understanding.

Better writing move. Use oral explanation and teacher scribing where appropriate.

Question to ask. Can the child explain verbally?

Practice task. Say answer before writing.

Primary sentence frame

Explanation principle. Sentence frames can scaffold early explanation.

Common failure. Students become dependent on frames.

Better writing move. Use frames temporarily then fade.

Question to ask. Can the learner explain without the prompt?

Practice task. Remove one frame element over time.

Secondary explanation

Explanation principle. Older learners should increasingly organise explanations independently.

Common failure. Students overuse rigid CER labels in final prose.

Better writing move. Use CER as planning architecture, not necessarily visible headings.

Question to ask. Does the explanation read naturally and scientifically?

Practice task. Write without labels after planning.

Three-student explanation lesson

Explanation principle. Three independent answers reveal different missing components.

Common failure. Students copy the strongest writer.

Better writing move. Require silent first drafts, then compare.

Question to ask. Which answer has best evidence or reasoning?

Practice task. Build a combined exemplar.

Parent feedback

Explanation principle. Parents can ask for evidence and mechanism without rewriting the answer.

Common failure. Parents may supply the exact school wording too quickly.

Better writing move. Ask ‘What in the question supports that?’ and ‘Why does that cause it?’

Question to ask. Can the learner repair independently?

Practice task. Use two diagnostic prompts only.

Tutor feedback

Explanation principle. Tutor feedback should identify the missing scientific operation.

Common failure. Tutors may mark vague words such as ‘more detail needed’.

Better writing move. Name claim/evidence/reasoning/mechanism gap.

Question to ask. Which part is missing first?

Practice task. Retest with a changed question.

Explanation finish rule

Explanation principle. An explanation is finished when it answers the question and the reasoning chain is complete.

Common failure. Students keep adding facts.

Better writing move. Stop after complete claim, sufficient evidence and mechanism.

Question to ask. Does every sentence contribute?

Practice task. Delete one nonessential fact.

A twelve-week scientific-explanation programme

Week 1: claims and question reading.
Week 2: observations and evidence.
Week 3: reasoning and mechanisms.
Week 4: cause-process-effect.
Week 5: comparisons and predictions.
Week 6: experiment explanations.
Week 7: graphs and table evidence.
Week 8: Biology and ecosystem explanations.
Week 9: Chemistry and particle explanations.
Week 10: Physics and quantitative explanations.
Week 11: alternatives, rebuttals and uncertainty.
Week 12: mixed open-ended transfer and delayed rewrite.

When tuition may help with scientific explanations

Extra support can help when a learner knows the facts but repeatedly writes incomplete open-ended answers, copies evidence without reasoning or uses keywords without mechanism. A tutor should diagnose which component is missing, model it once and then fade the scaffold.

For current Primary 3–6 and PSLE programme information, use Primary Science Tuition Sengkang. Secondary explanation-writing coverage here is educational transition material.

Frequently asked questions

What is claim-evidence-reasoning?

A claim answers the question, evidence supports the claim with observations or data, and reasoning explains why the evidence supports the claim using scientific ideas.

Do all Science answers need CER?

No. CER is a useful planning framework for evidence-based explanations, but short state or calculate questions may not require all three parts explicitly.

What is the difference between evidence and reasoning?

Evidence comes from observations, measurements or provided information; reasoning uses scientific concepts to explain why that evidence supports the claim.

Why do my explanations sound repetitive?

You may be restating the question or evidence instead of adding the mechanism. Ask what happens in between.

Should I use keywords?

Yes when they name the correct scientific process or relationship, but keywords alone do not replace reasoning.

How long should a scientific explanation be?

Long enough to answer the command and show the required relationships, but no longer than necessary. Use school mark allocation and feedback to calibrate.

Final operating rule

A scientific explanation must do more than contain correct Science words. Answer the question. Select evidence that matters. Make the mechanism visible. Keep the conclusion inside the evidence. Consider alternatives when appropriate. Then remove unnecessary facts. The result should let another reader see not only what you think, but why the evidence justifies it.

Question reading — explanation clinic 1

Start with a fresh Science question where question reading matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students write everything they know about the chapter.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Translate the command word and target into one sentence. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What must the final sentence answer? Run the practice task: Underline command, object and condition. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Finish with delayed transfer to another topic. Explanation skill is durable when the learner can build claim, evidence and reasoning in an unfamiliar context without sentence frames or copied model wording.

Claim — explanation clinic 1

Start with a fresh Science question where claim matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students write vague claims such as ‘it changes’.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Name the object, direction or conclusion clearly. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Could the claim stand alone as an answer? Run the practice task: Rewrite vague claims precisely. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Evidence — explanation clinic 1

Start with a fresh Science question where evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students use any true fact as evidence.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Select evidence that directly bears on the claim. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What would make the claim more or less believable? Run the practice task: Choose the strongest evidence from a table. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Reasoning — explanation clinic 1

Start with a fresh Science question where reasoning matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students repeat the evidence instead of explaining it.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Apply a relevant concept, model or mechanism. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Why does this evidence support this claim? Run the practice task: Write one reasoning sentence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Rebuttal — explanation clinic 1

Start with a fresh Science question where rebuttal matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students defend the claim at all costs.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Acknowledge alternative explanations and explain why the evidence favours one. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What else could explain the result? Run the practice task: Add one alternative and response. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Observation — explanation clinic 1

Start with a fresh Science question where observation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students mix observation with cause.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Write the direct result before interpreting it. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Could another observer verify this? Run the practice task: Separate observation and explanation. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Inference — explanation clinic 1

Start with a fresh Science question where inference matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students present inference as direct observation.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use calibrated wording. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What evidence supports the inference? Run the practice task: Write observation → inference pair. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Mechanism — explanation clinic 1

Start with a fresh Science question where mechanism matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students jump from cause to outcome.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Write condition → process → effect. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What happens in the middle? Run the practice task: Build a three-step chain. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Condition — explanation clinic 1

Start with a fresh Science question where condition matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students give a general fact and ignore the setup.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State the relevant temperature, connection, environment or treatment. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which condition changes the answer? Run the practice task: Add condition to a generic explanation. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Comparison — explanation clinic 1

Start with a fresh Science question where comparison matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students describe A and B separately.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use a shared dimension and explain the difference. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What property is being compared? Run the practice task: Write a matched comparison. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Cause — explanation clinic 1

Start with a fresh Science question where cause matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students infer cause from sequence alone.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Link causal claims to controlled evidence or established mechanism. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What alternative causes were ruled out? Run the practice task: Compare causal and correlational wording. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Correlation — explanation clinic 1

Start with a fresh Science question where correlation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students use causal verbs for observational data.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use associated with or linked to unless stronger evidence exists. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Could a third variable explain the pattern? Run the practice task: Rewrite overcausal sentences. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Prediction — explanation clinic 1

Start with a fresh Science question where prediction matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students state a guess without mechanism.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Connect prediction to a scientific relationship. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Why should this outcome occur? Run the practice task: Write prediction + reason. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Explanation versus description — explanation clinic 1

Start with a fresh Science question where explanation versus description matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students provide only trend language for an explain question.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Add the mechanism after the evidence. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What caused the described pattern? Run the practice task: Turn descriptions into explanations. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Explanation versus definition — explanation clinic 1

Start with a fresh Science question where explanation versus definition matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students answer why questions with definitions.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use definitions only as building blocks. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What relationship must the definition help explain? Run the practice task: Upgrade a definition-only answer. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Explanation versus example — explanation clinic 1

Start with a fresh Science question where explanation versus example matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students give one example instead of mechanism.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State the rule first, then use example if helpful. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Would the answer still explain another case? Run the practice task: Replace example-only answer with general mechanism. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Evidence versus reasoning — explanation clinic 1

Start with a fresh Science question where evidence versus reasoning matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students merge them into one vague sentence.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Separate the data sentence from the scientific principle. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which words come from the experiment and which from Science knowledge? Run the practice task: Colour-code a sample answer conceptually. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Relevant evidence — explanation clinic 1

Start with a fresh Science question where relevant evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students include all data from the table.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Choose only values that test the relationship. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which rows or points matter? Run the practice task: Remove irrelevant evidence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Sufficient evidence — explanation clinic 1

Start with a fresh Science question where sufficient evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students use one weak observation for a broad conclusion.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Match amount and quality of evidence to claim strength. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Does this evidence justify ‘always’? Run the practice task: Narrow the claim or add evidence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Quantitative evidence — explanation clinic 1

Start with a fresh Science question where quantitative evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students say ‘more’ when exact values are available.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use relevant values and units when helpful. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which numbers make the comparison clear? Run the practice task: Add two values to a claim. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Qualitative evidence — explanation clinic 1

Start with a fresh Science question where qualitative evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students dismiss observations because they lack numbers.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use defined categories and controlled observation. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What feature was observed consistently? Run the practice task: Write evidence from an image or specimen. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Graph evidence — explanation clinic 1

Start with a fresh Science question where graph evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students use expected theory instead of actual data.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Describe the graph first. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What pattern is visible? Run the practice task: Write evidence from a graph. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Table evidence — explanation clinic 1

Start with a fresh Science question where table evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students compare values from different treatments or times.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Select like-for-like data. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which cells form the valid comparison? Run the practice task: Write a table-based evidence sentence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Diagram evidence — explanation clinic 1

Start with a fresh Science question where diagram evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students assume arrows or colours are literal.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Interpret the convention before reasoning. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What does the symbol represent? Run the practice task: Use one labelled feature as evidence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Experimental evidence — explanation clinic 1

Start with a fresh Science question where experimental evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students cite a result without checking fairness.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State the tested change and measured outcome. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Was the comparison controlled? Run the practice task: Write evidence with condition. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Model evidence — explanation clinic 1

Start with a fresh Science question where model evidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students use model as if it were raw data.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Distinguish model prediction from empirical observation. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What measurement tests the model? Run the practice task: Write model + evidence pair. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Scientific principle — explanation clinic 1

Start with a fresh Science question where scientific principle matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students insert vocabulary without linking it to data.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State the principle in a way that directly explains the evidence. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which concept bridges evidence and claim? Run the practice task: Write one principle sentence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Cause-process-effect — explanation clinic 1

Start with a fresh Science question where cause-process-effect matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students omit the process.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Write cause → process → effect in one or more sentences. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What happens in between? Run the practice task: Build a compact mechanism. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Structure-function — explanation clinic 1

Start with a fresh Science question where structure-function matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students name a structure but do not explain advantage.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State how a feature enables a process. The revision should change the reasoning, not merely make the sentence longer.

Now ask: How does shape or arrangement support function? Run the practice task: Explain root hair or red blood cell examples. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Particle explanation — explanation clinic 1

Start with a fresh Science question where particle explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students describe macroscopic observation only.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Link particle spacing, motion or rearrangement to the observed effect. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What are particles doing? Run the practice task: Explain dissolving or state change. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Force explanation — explanation clinic 1

Start with a fresh Science question where force explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students name gravity or friction only.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State which force acts and how motion changes. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Force on what, by what? Run the practice task: Write one force-based explanation. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Energy explanation — explanation clinic 1

Start with a fresh Science question where energy explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students write ‘energy is used up’.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Name starting form/store, transfer and resulting effect. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Where did the energy go? Run the practice task: Explain a bouncing ball or device. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Circuit explanation — explanation clinic 1

Start with a fresh Science question where circuit explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students rely on visual layout.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Trace path and component relationships. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What complete path exists? Run the practice task: Explain why a bulb lights. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Heat explanation — explanation clinic 1

Start with a fresh Science question where heat explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students confuse heat with temperature.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State temperature difference and energy transfer. The revision should change the reasoning, not merely make the sentence longer.

Now ask: From where to where does energy move? Run the practice task: Explain insulation. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Ecosystem explanation — explanation clinic 1

Start with a fresh Science question where ecosystem explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students write ‘everything changes’.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Follow one pathway at a time. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Which population changes first? Run the practice task: Explain one food-web effect. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Earth-system explanation — explanation clinic 1

Start with a fresh Science question where earth-system explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students describe cycle diagrams without mechanism.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Track matter or energy among reservoirs. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What moves and what drives it? Run the practice task: Explain evaporation or erosion. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Astronomy explanation — explanation clinic 1

Start with a fresh Science question where astronomy explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students rely on images without measurement logic.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State what was observed and what model explains it. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What signal was measured? Run the practice task: Explain exoplanet transit evidence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Equation explanation — explanation clinic 1

Start with a fresh Science question where equation explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students insert formulas without meaning.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Explain the relationship qualitatively first. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What happens when one quantity changes? Run the practice task: Explain one formula in words. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Unit explanation — explanation clinic 1

Start with a fresh Science question where unit explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students use correct number with wrong scientific meaning.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use units to identify and check the quantity. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What does this unit measure? Run the practice task: Repair a unit-mismatched answer. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Uncertainty — explanation clinic 1

Start with a fresh Science question where uncertainty matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students overstate precision.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use calibrated wording and limits. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What remains uncertain? Run the practice task: Add one limitation to a conclusion. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Alternative explanation — explanation clinic 1

Start with a fresh Science question where alternative explanation matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students treat first answer as the only possible one.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Generate another mechanism and compare predictions. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What evidence would distinguish them? Run the practice task: Write two competing explanations. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Counterevidence — explanation clinic 1

Start with a fresh Science question where counterevidence matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students cherry-pick supporting data.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: State the conflicting observation and explain whether it weakens or changes the conclusion. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Does this anomaly matter? Run the practice task: Revise claim after counterevidence. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Scope — explanation clinic 1

Start with a fresh Science question where scope matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students universalise from one experiment.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Keep wording inside tested conditions. The revision should change the reasoning, not merely make the sentence longer.

Now ask: Who or what does the claim apply to? Run the practice task: Replace ‘always’ with calibrated scope. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Qualifier — explanation clinic 1

Start with a fresh Science question where qualifier matters. Ask the learner to write a first answer without a model response. Then identify whether the required explanation component is present and scientifically connected.

Surface the common failure: Students think qualifiers make answers weak.. Ask how that failure would affect a reader’s ability to follow the logic. Then apply the better move: Use them when evidence does not justify absolutes. The revision should change the reasoning, not merely make the sentence longer.

Now ask: What strength of language fits the evidence? Run the practice task: Rewrite an absolute claim. Compare the revised answer with the evidence in the question. Every scientific claim should be supported and every piece of evidence should have a clear explanatory role.

Small Group Tutorials

Advanced Science Tutorials | How to Write Scientific Explanations: Claim, Evidence, Reasoning and Mechanisms