Ten-Year Series · PSLE 2020
PSLE Science 2020 Answers
The answer key for the PSLE Science 2020 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 | (4) | Systems · Human digestive systemMCQ | 2 |
| Q3 | (1) | Systems · Human digestive systemMCQ | 2 |
| Q4 | (3) | Systems · Plant vs animal cellsMCQ | 2 |
| Q5 | (1) | Diversity · Classifying living thingsMCQ | 2 |
| Q6 | (2) | Systems · Human respiratory systemMCQ | 2 |
| Q7 | (4) | Energy · Forms of energyMCQ | 2 |
| Q8 | (3) | Systems · Plant transport xylem & phloemMCQ | 2 |
| Q9 | (3) | Interactions · Environment and living thingsMCQ | 2 |
| Q10 | (2) | Cycles · Plant reproductionMCQ | 2 |
| Q11 | (4) | Systems · Plant transport xylem & phloemMCQ | 2 |
| Q12 | (4) | Systems · Heart and circulationMCQ | 2 |
| Q13 | (4) | Systems · Plant vs animal cellsMCQ | 2 |
| Q14 | (2) | Diversity · Classifying living thingsMCQ | 2 |
| Q15 | (2) | Diversity · MaterialsMCQ | 2 |
| Q16 | (4) | Cycles · Three states of matterMCQ | 2 |
| Q17 | (3) | Systems · Series vs parallel circuitsMCQ | 2 |
| Q18 | (3) | Energy · Heat conductors vs insulatorsMCQ | 2 |
| Q19 | (1) | Interactions · MagnetsMCQ | 2 |
| Q20 | (3) | Cycles · Changes of stateMCQ | 2 |
| Q21 | (2) | Systems · Series vs parallel circuitsMCQ | 2 |
| Q22 | (4) | Interactions · ForcesMCQ | 2 |
| Q23 | (3) | Energy · Expansion and contractionMCQ | 2 |
| Q24 | (4) | Diversity · MaterialsMCQ | 2 |
| Q25 | (3) | Cycles · Three states of matterMCQ | 2 |
| Q26 | (4) | Energy · Light and shadowMCQ | 2 |
| Q27 | (3) | Cycles · Water cycleMCQ | 2 |
| Q28 | (4) | Interactions · MagnetsMCQ | 2 |
| Q29 | Model answer in worked solution | Systems · Heart and circulationOpen-ended | 4 |
| Q30 | Model answer in worked solution | Cycles · Plant reproductionOpen-ended | 4 |
| Q31 | Model answer in worked solution | Systems · Plant transport xylem & phloemOpen-ended | 3 |
| Q32 | Model answer in worked solution | Cycles · Life cycle of a butterflyOpen-ended | 4 |
| Q33 | Model answer in worked solution | Cycles · Plant reproductionOpen-ended | 4 |
| Q34 | Model answer in worked solution | Energy · Forms of energyOpen-ended | 3 |
| Q35 | Model answer in worked solution | Cycles · Changes of stateOpen-ended | 3 |
| Q36 | Model answer in worked solution | Interactions · MagnetsOpen-ended | 3 |
| Q37 | Model answer in worked solution | Interactions · ForcesOpen-ended | 4 |
| Q38 | Model answer in worked solution | Interactions · ForcesOpen-ended | 4 |
| Q39 | Model answer in worked solution | Interactions · MagnetsOpen-ended | 5 |
| Q40 | Model answer in worked solution | Cycles · Changes of stateOpen-ended | 3 |
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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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