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Primary 3 Science Materials Quiz
Free P3 Science Materials quiz, AI version, with questions, answers, and syllabus-aligned practice for Singapore students.
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TuitionGoWhere Primary School (AI)
Primary 3 Science - Materials Quiz 01 - Answer Key
Section A: Multiple Choice Questions (1 mark each)
1. B) Rubber
Rubber is flexible - it can be bent and stretched without breaking. Glass, stone, and ceramic are brittle.
2. C) Transparent
Transparent materials allow light to pass through completely, and we can see clearly through them.
3. C) Metal
Metal is the best conductor of heat among the options. Wood, plastic, and rubber are insulators.
4. C) Metal conducts heat well
Metal pots conduct heat well, allowing food to be cooked efficiently.
5. B) Wooden block
Wood is less dense than water, so it floats. Metal, glass, and stone are denser and sink.
Section B: Short Answer Questions (2 marks each)
6. Any two of:
- Transparent (allows light to pass through)
- Hard/strong (provides protection)
- Waterproof (keeps rain out)
- Smooth (easy to clean)
Award 1 mark for each correct property
7. Transparent materials allow light to pass through completely, and we can see clearly through them (e.g., clear glass). Opaque materials do not allow any light to pass through, and we cannot see through them (e.g., wood).
Award 1 mark for transparent explanation, 1 mark for opaque explanation
8. a) Waterproof: plastic, rubber, wax, nylon, metal (any one)
b) Absorbent: cotton, cloth, paper, sponge, towel (any one)
Award 1 mark for each correct answer
9. Plastic and rubber are electrical insulators. They do not conduct electricity, so they protect us from getting an electric shock.
Award 2 marks for mentioning insulator/does not conduct electricity AND safety
10. Any two of:
- Good conductor of heat
- Good conductor of electricity
- Strong/hard
- Shiny/lustrous
- Can be bent/shaped
- Usually heavy/dense
Award 1 mark for each correct property
Section C: Application Questions (2 marks each)
11. She should use a waterproof material like plastic or nylon. This is because the umbrella needs to prevent water (rain) from passing through to keep the user dry.
Award 1 mark for material, 1 mark for explanation
12. Plastic and wood are poor conductors of heat (insulators). They do not transfer heat from the pot to our hands, so we can hold the handle without getting burnt.
Award 2 marks for mentioning insulators/poor conductors AND preventing burns
13. Plastic is not brittle / Plastic does not break easily / Plastic is more durable. This makes it safer for children who might drop things.
Award 2 marks for mentioning "not brittle" or "does not break easily"
14. He should use translucent glass. Translucent materials allow light to pass through but we cannot see clearly through them. This provides both light and privacy.
Award 1 mark for translucent, 1 mark for explanation
15.
Conductors: copper, iron
Insulators: wood, plastic, rubber
Award 1 mark for conductors correct, 1 mark for insulators correct
Marking Scheme Summary
- Section A: 5 marks (5 questions × 1 mark)
- Section B: 10 marks (5 questions × 2 marks)
- Section C: 10 marks (5 questions × 2 marks)
- Total: 25 marks
End of Answer Key