Ten-Year Series · PSLE 2018
PSLE Science 2018 Answers
The answer key for the PSLE Science 2018 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) | Diversity · Classifying living thingsMCQ | 2 |
| Q3 | (4) | Energy · Forms of energyMCQ | 2 |
| Q4 | (4) | Interactions · Food chainsMCQ | 2 |
| Q5 | (4) | Interactions · Environmental pollutionMCQ | 2 |
| Q6 | (2) | Systems · Human body systemsMCQ | 2 |
| Q7 | (3) | Cycles · Plant reproductionMCQ | 2 |
| Q8 | (3) | Interactions · Environmental pollutionMCQ | 2 |
| Q9 | (2) | Cycles · Life cycle of a plantMCQ | 2 |
| Q10 | (3) | Interactions · Food chainsMCQ | 2 |
| Q11 | (3) | Cycles · Plant reproductionMCQ | 2 |
| Q12 | (4) | Systems · Human digestive systemMCQ | 2 |
| Q13 | (4) | Systems · Plant vs animal cellsMCQ | 2 |
| Q14 | (1) | Systems · Plant parts and functionsMCQ | 2 |
| Q15 | (4) | Interactions · ForcesMCQ | 2 |
| Q16 | (1) | Energy · Heat conductors vs insulatorsMCQ | 2 |
| Q17 | (1) | Energy · Forms of energyMCQ | 2 |
| Q18 | (2) | Diversity · MaterialsMCQ | 2 |
| Q19 | (2) | Cycles · Three states of matterMCQ | 2 |
| Q20 | (1) | Cycles · Changes of stateMCQ | 2 |
| Q21 | (1) | Systems · Series vs parallel circuitsMCQ | 2 |
| Q22 | (3) | Diversity · MaterialsMCQ | 2 |
| Q23 | (2) | Interactions · MagnetsMCQ | 2 |
| Q24 | (4) | Energy · Light and shadowMCQ | 2 |
| Q25 | (2) | Cycles · Water cycleMCQ | 2 |
| Q26 | (4) | Interactions · ForcesMCQ | 2 |
| Q27 | (3) | Interactions · MagnetsMCQ | 2 |
| Q28 | (4) | Interactions · ForcesMCQ | 2 |
| Q29 | Model answer in worked solution | Energy · Forms of energyOpen-ended | 3 |
| Q30 | Model answer in worked solution | Interactions · AdaptationsOpen-ended | 3 |
| Q31 | Model answer in worked solution | Energy · Heat conductors vs insulatorsOpen-ended | 3 |
| Q32 | Model answer in worked solution | Cycles · Life cycle of a plantOpen-ended | 4 |
| Q33 | Model answer in worked solution | Cycles · Life cycles of animalsOpen-ended | 5 |
| Q34 | Model answer in worked solution | Interactions · AdaptationsOpen-ended | 4 |
| Q35 | Model answer in worked solution | Energy · Forms of energyOpen-ended | 4 |
| Q36 | Model answer in worked solution | Energy · Heat and temperatureOpen-ended | 3 |
| Q37 | Model answer in worked solution | Interactions · ForcesOpen-ended | 3 |
| Q38 | Model answer in worked solution | Systems · Series vs parallel circuitsOpen-ended | 4 |
| 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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