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Primary 6 PSLE Science Materials Quiz
Free P6 PSLE Science Materials quiz, Ox Exam version, with questions, answers, and PSLE-focused practice for Singapore students.
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Questions
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Answers
Answer Key — Primary 6 PSLE Science Quiz (Materials), Version 1
Answer 1.
(2) — The window must allow light to pass through so objects behind it can be seen clearly (transparency). [2]
New-student note: Materials that let light pass through so we can see clearly through them are called transparent materials, e.g. clear glass and clear plastic.
Answer 2.
(1) Material A — it is both waterproof and flexible, which suits a raincoat. [2]
Marking note: Award the mark only for option (1); a raincoat must keep water out AND bend with movement.
Answer 3.
(1) — Steel is a magnetic material; aluminium is not, so only the steel cans were pulled towards the magnet. [2]
Answer 4.
(1) — Iron and steel are magnetic; aluminium and copper are non-magnetic. [2]
Answer 5.
(3) — Wood is a poor conductor of heat, so the handle stays cool enough to hold. [2]
Answer 6.
Natural: cotton, wool, wood. Man-made: glass, plastic, paper. [3]
Marking note: Award 3 marks for all six correctly placed; deduct 1 mark per incomplete/misplaced column (max deduction 3).
Answer 7.
Metal conducts heat well, so the pot heats food quickly and is durable. Plastic does not conduct heat easily, so the handle stays cool and is safe to hold. [3]
Response structure: 1 mark — metal conducts heat (cooks quickly); 1 mark — plastic is a poor conductor; 1 mark — handle stays cool/safe to hold.
Answer 8.
Bring the magnet close to each rod in turn. Only the steel rod will be attracted to (stick to) the magnet. The glass, wooden and plastic rods will not be attracted because they are non-magnetic. [3]
Answer 9.
Any three: waterproof (holds water without leaking); lightweight (easy to carry); flexible/not brittle (does not break easily when dropped); durable/cheap. [3]
Answer 10.
Ceramic is hard but brittle, so it cracked when it hit the ground. Rubber is flexible and elastic, so it deformed on impact and absorbed the force, bouncing instead of breaking. [3]
Answer 11.
Fabric R — it does not allow water to pass through (waterproof) and does not tear easily (strong), so it keeps the user dry and lasts longer. [3]
Marking note: 1 mark for choosing R; 2 marks for reasoning using BOTH test results.
Answer 12.
Similarity: both are waterproof, so they can hold water without leaking. Difference: glass is rigid and brittle (breaks easily) while plastic is flexible and does not shatter easily. [3]
Answer 13.
- (a) Z — it held the most weights (11) before breaking. [1]
- (b) W — it broke with only 2 weights. [1]
- (c) Same-sized strips / same thickness of strips / same weights added one at a time. [1]
Answer 14.
Glass is transparent, so shoppers can see the goods displayed inside; wood is opaque and blocks the view. Glass is also waterproof and easy to clean, so it stays clear in the rain. [3]
Answer 15.
Plastic bags are non-biodegradable, so discarded bags pollute the land and water and can harm animals for many years. Reduce by bringing a reusable bag when shopping. [3]
Answer 16.
It must not catch fire easily (fire-resistant) so flames cannot burn the firefighter; it must be waterproof so hot water and steam cannot scald the skin. [3]
Marking note: 1 mark per correct property + 1 mark for one linked explanation of importance.
Answer 17.
Clear glass — transparent (clear image seen); tracing paper — translucent (blurred patch of light); cardboard — opaque (no light passed through). [3]
New-student note: Transparent lets all light through with a clear view; translucent lets some light through but blurs the view; opaque blocks all light.
Answer 18.
Move a magnet through the sand. The steel pins are magnetic and stick to the magnet, while the sand is non-magnetic and stays behind, separating the pins quickly. [3]
Answer 19.
Newspaper — it is very light, so the wind can lift the kite easily, and it is stiff enough to hold the kite's shape. Cloth is too heavy and foil tears or crumples easily. [3]
Answer 20.
Styrofoam is a poor conductor of heat (a good insulator) and traps air, so little heat escapes from the water. Paper conducts heat away faster, so the water in it cooled more. [3]