Primary 6 Science is not complete when the pupil gets the right idea privately. Science has to be communicated so that another reader can see the question, the evidence, the relationship and the conclusion without guessing what the writer meant.
This guide develops scientific communication, presentation of findings, evidence selection and clear reporting for PSLE Science. It goes beyond sentence-level answer language by showing how a pupil can organise an entire investigation or evidence set into a coherent scientific account.
Return to the Primary 6 Science Learning Hub.
The communication rule
QUESTION → METHOD → RESULT → PATTERN → EVIDENCE → EXPLANATION → CONCLUSION → LIMIT.
This is an eduKate communication routine, not an official SEAB formula.
Part I — Scientific communication has a reader
The reader should be able to tell:
- what was investigated;
- what changed;
- what was measured;
- what the results showed;
- what scientific relationship explains the pattern;
- how strongly the conclusion is supported.
If any of these are hidden, the explanation becomes harder to verify.
Part II — Put the finding before the explanation
Weak order: “Friction slows moving objects. The car travelled 42 cm.”
Stronger order: “The car travelled 42 cm on Surface Q compared with 80 cm on Surface P. This shorter distance is consistent with a greater frictional effect on Q.”
The reader sees the evidence before the scientific interpretation.
Part III — Present quantities with labels and units
Numbers without quantities are weak communication.
Weak: “A was 42 and B was 80.”
Stronger: “The car travelled 42 cm on Q and 80 cm on P.”
Name the measured quantity and include the unit.
Part IV — Tables should expose the comparison
| Surface | Trial 1 distance (cm) | Trial 2 distance (cm) | Trial 3 distance (cm) | Average distance (cm) |
|---|---|---|---|---|
| P | 79 | 81 | 80 | 80 |
| Q | 44 | 46 | 45 | 45 |
A reader can immediately see the variable, repeated trials and typical outcome.
Part V — Graphs communicate relationships
A graph is useful when the pattern across several values matters.
Good communication includes:
- correct axes;
- clear units;
- sensible scale;
- accurate plotting;
- title or context where required;
- a written statement of the key relationship.
The graph does not replace the scientific sentence.
Part VI — Diagrams communicate structure
A diagram is strongest when it shows:
- important parts;
- connections;
- directions of movement or transfer;
- labels that are needed for the reasoning;
- only enough detail to support the scientific job.
Decorative detail can make a diagram harder to read.
Part VII — Describe first, explain second
For data:
Description: “Bubble count decreased as lamp distance increased from 10 cm to 30 cm.”
Explanation: “At greater distance, less light reached the plant, so less light energy was available for photosynthesis under the stated conditions.”
Separating these jobs prevents evidence from being confused with mechanism.
Part VIII — Use evidence selectively
Do not copy every number from a table.
Select the values that establish the relationship.
Example: “Bubble count fell from 42 to 20 as lamp distance increased from 10 cm to 30 cm.”
This is usually clearer than listing every intermediate value if the question asks for the overall trend.
Part IX — Use comparisons symmetrically
Weak: “P is 80 cm while Q has more friction.”
That mixes measurement and inference.
Stronger:
“The car travelled farther on P than Q. Therefore, under otherwise comparable conditions, Q produced the greater frictional effect.”
Part X — Communicating uncertainty
Use wording that matches evidence strength.
- shows: when the result directly demonstrates the stated comparison under the setup;
- supports: when evidence strengthens a scientific explanation;
- suggests: when the evidence is indirect or alternatives remain;
- may: when predicting beyond direct observation.
Part XI — Communicating anomalies
Do not hide unusual results.
Example:
“Three trials gave 79–81 cm, while one trial gave 42 cm. The 42 cm reading is anomalous and should be checked or repeated before calculating a final typical value.”
This is stronger than silently deleting the result.
Part XII — Communicating method limitations
A limitation should say:
- what the weakness is;
- how it affects the evidence;
- what improvement would address it.
Example: “Bubble count may not measure gas volume accurately because bubble size can vary. Collecting and measuring gas volume would provide a more direct quantitative measure.”
Part XIII — Communicating a conclusion
A strong conclusion:
- answers the original question;
- states the relationship;
- stays inside the tested range;
- can cite evidence if needed;
- does not add a new unsupported mechanism.
Original communication workshop 1 — cooling
Question: Which covering reduces cooling more?
Finding: Cup Q fell from 80°C to 61°C while Cup P fell to 52°C in ten minutes.
Comparison: Q had the smaller temperature decrease.
Conclusion: Under the tested conditions, Q reduced cooling more effectively.
Original communication workshop 2 — food web
Evidence: Bird A eats both X and Y.
Change: X decreases while Y remains available.
Scientific communication: “Bird A may not decrease immediately because it can still obtain food from Y.”
The answer communicates the alternative pathway directly.
Original communication workshop 3 — spring
Finding: extension increased from 0 to 4 cm as load increased from 0 to 2 units.
Conclusion: Within this tested range, greater load produced greater extension.
Boundary: the result should not be extrapolated indefinitely.
Part XIV — Scientific captions
A useful figure or table caption tells the reader what is being shown.
Weak: “Graph 1.”
Stronger: “Bubble count measured over five minutes at different lamp distances.”
Part XV — Scientific summaries
A strong short summary can follow:
Question → key result → scientific interpretation → limit.
Example: “Increasing lamp distance reduced bubble count over the tested range. This is consistent with less light reaching the plant and lower photosynthesis-related output. Bubble count is an indirect measure of gas production.”
Part XVI — Oral scientific explanation
When explaining aloud:
- name the system;
- state the changed condition;
- identify the result;
- explain the mechanism;
- state the conclusion;
- answer follow-up questions without reading a script.
Oral explanation is a powerful check of genuine understanding.
Part XVII — The REPORT test
- R — Research question: what was investigated?
- E — Evidence: what was measured?
- P — Pattern: what relationship appears?
- O — Outcome: what conclusion follows?
- R — Reason: what scientific mechanism explains it?
- T — Terms: are quantities, units and confidence words precise?
This is an eduKate teaching mnemonic.
Part XVIII — Common communication failures
- Numbers without units.
- Tables without headings.
- Graph trends described without range.
- Explanation given before evidence.
- Observation and inference mixed together.
- Unsupported certainty.
- Long answer with no direct conclusion.
- Using pronouns with unclear reference.
- Ignoring anomalies.
Part XIX — Communication as verification
If another reader cannot reconstruct how the conclusion came from the evidence, the communication is incomplete.
Clarity is therefore part of scientific quality, not merely writing style.
Where to connect
- Scientific Vocabulary, Precision & Answer Language
- Practical Planning, Data Recording & Conclusions
- Primary 4 Scientific Communication & Presenting Findings
Retrieval checklist
- I can organise a scientific account from question to conclusion.
- I put findings before explanations when appropriate.
- I label quantities and units clearly.
- I select evidence instead of copying everything.
- I distinguish description from explanation.
- I communicate uncertainty with suitable words.
- I report anomalies honestly.
- I can state a limitation and targeted improvement.
- I can summarise an investigation concisely.
- I can explain the Science aloud without losing the evidence chain.
The quiet return
Scientific understanding becomes public only when another person can follow the path from question to evidence to explanation.
Show the result. Name the pattern. Explain the mechanism. State the conclusion. Keep the evidence visible.
Return to the Primary 6 Science Learning Hub.
