Ten-Year Series · PSLE 2025
PSLE Science 2025 Answers
The answer key for the PSLE Science 2025 paper (Paper 1): 40 questions, 28 with a free final answer, plus the topic and marks for each. Find the question number in your TYS book and tick it off.
We publish answers only. The questions and diagrams stay in your printed Ten-Year Series (TYS) book, so keep it open beside this page (“see the diagram in your book”).
MCQ answers are option numbers, e.g. (3).
Paper 1
40 questions · 28 free final answers · 100 marks listed
| Q | Answer | Topic / section | Marks |
|---|---|---|---|
| Q1 | (1) | Diversity · Classifying living thingsMCQ | 2 |
| Q2 | (2) | Interactions · Environmental pollutionMCQ | 2 |
| Q3 | (3) | Diversity · Classifying living thingsMCQ | 2 |
| Q4 | (3) | Cycles · Plant reproductionMCQ | 2 |
| Q5 | (3) | Cycles · Life cycle of a plantMCQ | 2 |
| Q6 | (4) | Cycles · Plant reproductionMCQ | 2 |
| Q7 | (3) | Systems · Plant transport xylem & phloemMCQ | 2 |
| Q8 | (1) | Systems · Plant vs animal cellsMCQ | 2 |
| Q9 | (3) | Systems · Human respiratory systemMCQ | 2 |
| Q10 | (2) | Systems · Heart and circulationMCQ | 2 |
| Q11 | (4) | Interactions · AdaptationsMCQ | 2 |
| Q12 | (4) | Cycles · Life cycle of a plantMCQ | 2 |
| Q13 | (1) | Energy · Forms of energyMCQ | 2 |
| Q14 | (4) | Diversity · Classifying living thingsMCQ | 2 |
| Q15 | (3) | Energy · Light and shadowMCQ | 2 |
| Q16 | (2) | Cycles · Three states of matterMCQ | 2 |
| Q17 | (3) | Diversity · MaterialsMCQ | 2 |
| Q18 | (4) | Systems · Series vs parallel circuitsMCQ | 2 |
| Q19 | (3) | Interactions · ForcesMCQ | 2 |
| Q20 | (2) | Cycles · Water cycleMCQ | 2 |
| Q21 | (1) | Interactions · MagnetsMCQ | 2 |
| Q22 | (3) | Energy · Heat conductors vs insulatorsMCQ | 2 |
| Q23 | (3) | Cycles · Changes of stateMCQ | 2 |
| Q24 | (1) | Interactions · ForcesMCQ | 2 |
| Q25 | (4) | Interactions · ForcesMCQ | 2 |
| Q26 | (4) | Energy · Conservation of energyMCQ | 2 |
| Q27 | (3) | Cycles · Changes of stateMCQ | 2 |
| Q28 | (2) | Energy · Forms of energyMCQ | 2 |
| Q29 | Model answer in worked solution | Systems · Human body systemsOpen-ended | 3 |
| Q30 | Model answer in worked solution | Interactions · Food chainsOpen-ended | 3 |
| Q31 | Model answer in worked solution | Systems · Human digestive systemOpen-ended | 3 |
| Q32 | Model answer in worked solution | Energy · Forms of energyOpen-ended | 5 |
| Q33 | Model answer in worked solution | Cycles · Life cycle of a butterflyOpen-ended | 4 |
| Q34 | Model answer in worked solution | Cycles · Plant reproductionOpen-ended | 4 |
| Q35 | Model answer in worked solution | Systems · Series vs parallel circuitsOpen-ended | 3 |
| Q36 | Model answer in worked solution | Diversity · MaterialsOpen-ended | 3 |
| Q37 | Model answer in worked solution | Diversity · MaterialsOpen-ended | 3 |
| Q38 | Model answer in worked solution | Energy · Forms of energyOpen-ended | 5 |
| Q39 | Model answer in worked solution | Cycles · Changes of stateOpen-ended | 4 |
| Q40 | Model answer in worked solution | Interactions · MagnetsOpen-ended | 4 |
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Step-by-step worked solutions for every Science question, written the way PSLE markers award method marks, plus model answers for open-ended questions. We are adding them newest years first (2025 back to 2021), checked against the answer key on this page.
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