How to Answer “Determine” Questions in PSLE Science Without Turning Determination Into Explanation

Wait, What? “Determine” Does Not Always Mean “Explain Why”

A PSLE Science question can ask you to determine a value, identity, condition, relationship or outcome from the information given. Many learners make the task harder by immediately writing a long causal explanation. Others do the opposite: they guess from a familiar keyword without actually using the evidence.

DETERMINE = RESOLVE THE REQUESTED RESULT FROM THE GIVEN SCIENTIFIC INFORMATION.

Quick Answer

FIND WHAT MUST BE DETERMINED → IDENTIFY THE RELEVANT EVIDENCE OR RULE → WORK OUT THE RESULT → STATE IT PRECISELY → ADD EXPLANATION ONLY IF THE QUESTION ALSO ASKS FOR IT.

The Exact PSLE Science Learning Job This Guide Owns

This guide owns one response job: deriving the requested scientific result when a task asks the learner to determine something. It remains separate from infer, justify, explain and calculate-only jobs.

Why This Fits the 2026 PSLE Science Frame

For examination from 2026, PSLE Science assesses the 2023 Primary Science syllabus. The official objectives include applying scientific knowledge, interpreting and analysing information, evaluating information and methods, and communicating explanations and reasoning. A determine-style task can draw on those abilities even though “determine” itself is not a separate official assessment objective.

Four Common Determination Jobs

Determine…	Main learner job
a value	Read or calculate from valid data
an identity	Match properties or evidence to the correct object
a relationship	Compare aligned evidence across conditions
an outcome	Use the supplied condition and relevant scientific relationship

Worked Example 1 — Determine a Value

A table gives a starting temperature of 22°C and a final temperature of 29°C. The question asks for the temperature increase. The job is to determine the change: 7°C. A long explanation about heat transfer is unnecessary unless a later part asks why the temperature changed.

Worked Example 2 — Determine an Identity

Three unknown materials are described by properties. One is flexible, waterproof and does not absorb water. The task asks which material best fits a stated use. Determine by matching the relevant evidence to the use. Do not identify from appearance or familiarity alone.

Worked Example 3 — Determine a Relationship

Results are given for several light intensities and one measured response. To determine the relationship, first align the tested condition with the measured outcome, then describe the direction supported over the tested range. Do not add a causal mechanism if the task only asks what relationship the data show.

Worked Example 4 — Determine an Outcome From a Given Rule

A question gives an unfamiliar scientific rule and asks what happens when one condition changes. Apply the rule exactly to the case. The determination comes from the supplied relationship, not from guessing what usually happens in a familiar topic.

Determine Is Not the Same as Infer

An inference usually moves from evidence to a supported interpretation that is not directly stated. A determination may be more direct: reading a value, applying a rule, selecting an identity or deriving a result. Some tasks can involve both, but the learner should know which operation is doing the work.

Determine Is Not the Same as Explain

“Determine which set-up has the greater value” asks for a result. “Explain why that set-up has the greater value” asks for a mechanism. If both jobs are required, complete both. If only the first is asked, do not bury the result inside unnecessary explanation.

The PSLE Science Reasoning Chain

READ GIVEN INFORMATION → IDENTIFY WHAT MUST BE RESOLVED → IDENTIFY OBJECT OR RELATIONSHIP → SELECT RELEVANT EVIDENCE OR RULE → DERIVE THE RESULT → CHECK CONDITION AND UNITS → STATE THE RESULT → CHECK AGAINST THE EVIDENCE.

Observable Failure Signatures

Failure signature	Likely weak link
Long mechanism but no clear result	Determine confused with explain
Answer guessed from topic familiarity	Evidence not used
Correct arithmetic with wrong quantity	What must be determined was misread
Answer has no unit when a measured quantity needs one	Scientific quantity not preserved
Every number in the question is used	Relevant evidence not selected

Find the Earliest Weak Link

1. What exactly must I determine?
2. Is it a value, identity, relationship or outcome?
3. Which information directly bears on that job?
4. Do I need a calculation, comparison, rule or classification?
5. What condition limits the answer?
6. Does the result need a unit?
7. Does the question separately ask me to explain or justify?

Misconception Repair — “Determine Means Calculate”

Sometimes it does. Sometimes the task asks you to determine an identity, relationship or outcome without arithmetic. Let the scientific job decide the method.

Misconception Repair — “More Explanation Is Always Safer”

Extra explanation can introduce unsupported claims or hide the requested result. Answer the dominant job first. Add mechanism only when it is actually required.

Practice Protocol

1. Underline the object of “determine”.
2. Write the type of result: value / identity / relationship / outcome.
3. Circle only the evidence needed.
4. Perform the smallest valid reasoning operation.
5. State the result clearly.
6. Check units, condition and evidence.
7. Only then decide whether explanation is also required.

Unfamiliar Transfer Challenge

Create four original mini-questions using the same scientific topic: determine a value, determine an identity, determine a relationship and determine an outcome. Notice how the topic stays the same while the reasoning job changes.

Delayed Independent Return

Several days later, use a fresh question containing “determine”. Before solving, name the response job without looking at notes. Then check whether your answer contains exactly what was requested.

Answer-Checking Receipt

• I know what must be determined.
• I used the relevant evidence, not every detail.
• I chose the right operation.
• I preserved the scientific quantity and unit.
• I stated the requested result clearly.
• I did not add a mechanism unless the task asked for one.
• I checked the result against the question conditions.

Parent and Tutor Teaching Guide

Use one topic and write four determine-style prompts that ask for different result types. Ask the learner to name the job before answering. This prevents “determine” from becoming a memorised one-step formula.

If the learner over-explains, ask them to put the final result on the first line. If the learner guesses, ask them to point to the exact evidence or rule that resolves the result.

Useful Internal Routes

• PSLE Science Learning Guide
• Answer infer questions
• Answer justify questions
• Know whether a calculation is needed
• State, describe, explain, compare and predict

Authoritative References

• SEAB — PSLE Science syllabus, for examination from 2026
• MOE — Science Teaching & Learning Syllabus, Primary, 2023

Evidence and Boundary Note

This guide does not claim that “determine” has one universal marking formula or is a separately named official assessment objective. It teaches a response-reading habit: identify what must be resolved, use the relevant evidence and state the result precisely.

The Quiet Return

Strong Science answers do not begin by writing more.

They begin by knowing exactly what the question has asked you to find.