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Primary 6 PSLE Science Materials Quiz
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Questions
Primary 6 PSLE Science Quiz - Materials
Name: ___________________________
Class: ___________________________
Date: ___________________________
Score: ________ / 40
Duration: 40 minutes
Total Marks: 40
Instructions
- Answer ALL questions.
- Write your answers in the spaces provided.
- Marks for each question are shown in brackets [ ].
- You are advised to spend no more than 40 minutes on this paper.
- The use of calculators is NOT allowed.
Section A: Multiple Choice Questions (10 marks)
Questions 1–10 carry 1 mark each. Choose the most accurate answer.
1. Which property of a material describes its ability to be stretched and return to its original shape?
A) Strength
B) Flexibility
C) Elasticity
D) Waterproof
Answer: ___________
2. A student tested four materials by placing each one on a circuit. Which material would allow the bulb to light up?
A) Rubber band
B) Plastic ruler
C) Steel nail
D) Wooden stick
Answer: ___________
3. Which of the following is a natural material?
A) Nylon
B) Polyester
C) Cotton
D) Acrylic
Answer: ___________
4. Why is copper commonly used to make electrical wires?
A) It is a good insulator.
B) It is a good conductor of electricity.
C) It is waterproof.
D) It is flexible.
Answer: ___________
5. A material that does not allow heat to pass through it easily is called a __________.
A) conductor
B) insulator
C) transmitter
D) radiator
Answer: ___________
6. Which property is most important for a material used to make the sole of a hiking boot?
A) Transparency
B) Waterproof and high friction
C) Electrical conductivity
D) Magnetic attraction
Answer: ___________
7. When a rubber band is stretched and released, it returns to its original shape. This property is known as __________.
A) strength
B) flexibility
C) elasticity
D) waterproofing
Answer: ___________
8. Which of the following materials is the best conductor of heat?
A) Wood
B) Plastic
C) Aluminium
D) Rubber
Answer: ___________
9. A plastic bag does not allow water to pass through it. This means the plastic bag is __________.
A) absorbent
B) waterproof
C) flexible
D) transparent
Answer: ___________
10. Which of these materials is man-made (synthetic)?
A) Silk
B) Wool
C) Leather
D) Nylon
Answer: ___________
Section B: Short Answer Questions (20 marks)
Questions 11–16 carry 2–3 marks each. Write your answers in the spaces provided.
11. The table below shows the properties of four materials, P, Q, R, and S.
| Material | Conducts electricity | Flexible | Waterproof |
|---|---|---|---|
| P | Yes | Yes | No |
| Q | No | Yes | Yes |
| R | Yes | No | Yes |
| S | No | No | Yes |
(a) Which material, P, Q, R, or S, is most suitable for making the outer casing of an electrical plug? Explain your answer.
[2]
Answer: _______________________________________________________________
(b) Which material is most suitable for making a raincoat? Explain your answer.
[1]
Answer: _______________________________________________________________
12. A student wanted to test which of three materials — cotton cloth, aluminium foil, and tissue paper — is the best thermal insulator. She wrapped each material around a beaker containing hot water and measured the temperature of the water after 10 minutes.
(a) What is the aim of this experiment?
[1]
Answer: _______________________________________________________________
(b) What variable should she keep the same (controlled variable) to ensure a fair test? State two variables.
[2]
Answer: 1. _______________________________________________________________
(c) The results showed that the water wrapped in cotton cloth had the highest temperature after 10 minutes. What conclusion can the student draw?
[1]
Answer: _______________________________________________________________
13. Explain why the handles of cooking pots are usually made of plastic or wood instead of metal.
[2]
Answer: _______________________________________________________________
14. State two differences between natural materials and synthetic (man-made) materials.
[2]
| Natural Materials | Synthetic Materials |
|---|---|
| 1. _________________________ | 1. _________________________ |
| 2. _________________________ | 2. _________________________ |
15. A builder needs to choose a material for the roof of a house. The roof must be waterproof, strong, and durable. The builder is considering the following materials:
- Material X: Strong, waterproof, but very heavy
- Material Y: Lightweight, waterproof, but breaks easily
- Material Z: Strong, lightweight, but allows water to pass through
(a) Which material is the most suitable for the roof?
[1]
Answer: _______________________________________________________________
(b) Explain why the other two materials are not suitable.
[2]
Material Y: _______________________________________________________________
Material Z: _______________________________________________________________
16. The diagram below shows a simple circuit with a gap. Four different objects are placed in the gap one at a time to test if they conduct electricity.
[Battery] --- [Wire] --- [GAP] --- [Wire] --- [Bulb] --- [back to Battery]
The results are shown in the table:
| Object placed in gap | Bulb lights up? |
|---|---|
| Iron nail | Yes |
| Glass rod | No |
| Pencil lead (graphite) | Yes |
| Rubber eraser | No |
(a) What conclusion can you draw from these results?
[1]
Answer: _______________________________________________________________
(b) Classify the four objects into electrical conductors and electrical insulators.
[2]
| Conductors | Insulators |
|---|---|
| 1. _____________ | 1. _____________ |
| 2. _____________ | 2. _____________ |
Section C: Structured / Application Questions (10 marks)
Questions 17–20 carry 2–3 marks each. Answer in complete sentences where required.
17. Sarah is designing a new water bottle. She wants the bottle to be lightweight, waterproof, and strong enough not to break if dropped.
(a) Suggest one suitable material for making the water bottle.
[1]
Answer: _______________________________________________________________
(b) Explain why the material you suggested is suitable by referring to two of its properties.
[2]
Answer: _______________________________________________________________
18. A student stretched four different elastic bands (A, B, C, and D) by hanging equal masses on each. The length each band stretched is recorded in the table below.
| Elastic band | Stretch length (cm) |
|---|---|
| A | 2.0 |
| B | 4.5 |
| C | 1.5 |
| D | 3.0 |
(a) Which elastic band is the most elastic (stretches the most under the same load)?
[1]
Answer: _______________________________________________________________
(b) Which elastic band is the least elastic?
[1]
Answer: _______________________________________________________________
(c) If the student replaced elastic band C with a steel spring of the same size, would the steel spring stretch more or less than band C under the same load? Explain your answer.
[2]
Answer: _______________________________________________________________
19. Read the following passage and answer the questions that follow.
Glass is a material that is transparent, waterproof, and strong when compressed. However, it is brittle and breaks easily when bent or hit. Glass does not conduct electricity or heat well. Because of its transparency, glass is widely used to make windows, lenses, and laboratory equipment.
(a) State two properties of glass that make it suitable for making windows.
[2]
Answer: 1. _______________________________________________________________
(b) Explain why glass is not suitable for making electrical wires.
[1]
Answer: _______________________________________________________________
(c) Give one disadvantage of using glass to make a water bottle.
[1]
Answer: _______________________________________________________________
20. The table below shows the properties of five materials (V, W, X, Y, and Z) used in everyday objects.
| Material | Conducts heat | Conducts electricity | Flexible | Waterproof | Strong |
|---|---|---|---|---|---|
| V | Yes | Yes | No | Yes | Yes |
| W | No | No | Yes | Yes | No |
| X | No | No | No | Yes | Yes |
| Y | Yes | Yes | Yes | No | Yes |
| Z | No | No | Yes | Yes | Yes |
(a) Which material is most suitable for making a frying pan? Explain your answer by referring to two properties.
[2]
Answer: _______________________________________________________________
(b) Which material is most suitable for making a swimming cap? Explain your answer by referring to two properties.
[2]
Answer: _______________________________________________________________
END OF PAPER
Answers
Primary 6 PSLE Science Quiz - Materials
Answer Key
Section A: Multiple Choice Questions (10 × 1 mark = 10 marks)
1. C — Elasticity
Marking note: "Elasticity" is the specific property describing a material's ability to return to its original shape after being stretched. "Flexibility" (B) refers to the ability to bend, not necessarily to return to shape. Do not award marks for B.
2. C — Steel nail
Marking note: Steel is a metal and a good conductor of electricity. Rubber, plastic, and wood are insulators.
3. C — Cotton
Marking note: Cotton is obtained from the cotton plant and is a natural material. Nylon, polyester, and acrylic are synthetic.
4. B — It is a good conductor of electricity.
Marking note: Copper is widely used in electrical wiring because of its high electrical conductivity.
5. B — insulator
Marking note: A thermal insulator resists the flow of heat. A conductor (A) allows heat to pass through easily.
6. B — Waterproof and high friction
Marking note: A hiking boot sole needs grip (high friction) to prevent slipping and should be waterproof to keep feet dry.
7. C — elasticity
Marking note: Returning to original shape after being stretched defines elasticity.
8. C — Aluminium
Marking note: Aluminium is a metal and a good conductor of heat. Wood, plastic, and rubber are thermal insulators.
9. B — waterproof
Marking note: A material that does not allow water to pass through is described as waterproof.
10. D — Nylon
Marking note: Nylon is a synthetic polymer made from chemicals. Silk, wool, and leather are natural materials.
Section B: Short Answer Questions (20 marks)
11. (a) [2 marks]
Answer: Material R.
Explanation: The outer casing of an electrical plug must be an electrical insulator (does not conduct electricity) for safety, and it must be strong to protect the internal components. Material R does not conduct electricity and is strong.
Marking note: Award 1 mark for identifying Material R. Award 1 mark for explaining that it does not conduct electricity AND is strong. Both reasons required for full marks.
(b) [1 mark]
Answer: Material Q.
Explanation: A raincoat must be waterproof and flexible so the wearer can move comfortably. Material Q is both waterproof and flexible.
Marking note: Award 1 mark for identifying Material Q with a valid explanation referencing waterproof and flexible properties.
12. (a) [1 mark]
Answer: To find out which material (cotton cloth, aluminium foil, or tissue paper) is the best thermal insulator.
Marking note: Award 1 mark for stating the aim clearly. Accept any wording that conveys comparing thermal insulation of the three materials.
(b) [2 marks]
Answer (any two of the following):
- The volume/mass of hot water in each beaker must be the same.
- The starting temperature of the hot water must be the same.
- The thickness of each wrapping material must be the same.
- The size/surface area of each material used to wrap the beaker must be the same.
- The time duration (10 minutes) must be the same for all.
Marking note: Award 1 mark each for any two valid controlled variables. Do not accept vague answers like "the beaker" without specifying what about the beaker.
(c) [1 mark]
Answer: Cotton cloth is the best thermal insulator among the three materials because it kept the water hottest (lost the least heat).
Marking note: Award 1 mark for correctly identifying cotton cloth as the best insulator with a valid reason.
13. [2 marks]
Answer: Plastic and wood are poor conductors of heat (thermal insulators). They do not allow heat from the hot pot to pass through easily to the hand, so the user can hold the handle without getting burned. Metal, on the other hand, is a good conductor of heat and would transfer heat quickly, making it too hot to hold.
Marking note: Award 1 mark for stating that plastic/wood are poor conductors of heat (insulators). Award 1 mark for explaining that this prevents heat from reaching the hand / prevents burns. Do not award full marks if the comparison to metal is missing.
14. [2 marks]
| Natural Materials | Synthetic Materials |
|---|---|
| 1. Obtained from nature (plants, animals, minerals) | 1. Made by humans in factories / chemically produced |
| 2. Cannot be artificially created (or: examples include cotton, wood, silk, leather) | 2. Can be designed to have specific properties (or: examples include nylon, polyester, plastic) |
Marking note: Award 1 mark per valid difference. Accept any two valid differences. Common mistake: students may write "natural materials are weaker" — this is not always true and should not be accepted as a general difference.
15. (a) [1 mark]
Answer: Material X.
Marking note: Award 1 mark for correctly identifying Material X.
(b) [2 marks]
Material Y: It is not suitable because it breaks easily (not strong/durable), so the roof would not be able to withstand weather conditions or last long.
Material Z: It is not suitable because it allows water to pass through (not waterproof), so rain would leak into the house.
Marking note: Award 1 mark for each correct explanation. Students must link the property to the function of a roof.
16. (a) [1 mark]
Answer: Some materials conduct electricity while others do not. (Or: Metals and graphite conduct electricity; glass and rubber do not.)
Marking note: Award 1 mark for a valid conclusion. Accept any wording that distinguishes between conductors and insulators based on the results.
(b) [2 marks]
| Conductors | Insulators |
|---|---|
| 1. Iron nail | 1. Glass rod |
| 2. Pencil lead (graphite) | 2. Rubber eraser |
Marking note: Award 2 marks if all four are correctly classified. Award 1 mark if only two are correctly classified. Deduct 1 mark for each misclassification.
Section C: Structured / Application Questions (10 marks)
17. (a) [1 mark]
Answer: Plastic (or any specific plastic such as PET / polycarbonate).
Marking note: Accept any valid lightweight, waterproof, strong material. Do not accept glass (not strong when dropped) or metal (heavy).
(b) [2 marks]
Answer (example for plastic): Plastic is lightweight, so the bottle is easy to carry. Plastic is waterproof, so it will not leak. Plastic is strong and does not break easily when dropped.
Marking note: Award 1 mark for each valid property linked to the function (max 2 marks). Students must refer to at least two properties from the question context (lightweight, waterproof, strong).
18. (a) [1 mark]
Answer: Elastic band B (stretched 4.5 cm, the most under the same load).
Marking note: Award 1 mark for identifying B.
(b) [1 mark]
Answer: Elastic band C (stretched 1.5 cm, the least under the same load).
Marking note: Award 1 mark for identifying C.
(c) [2 marks]
Answer: The steel spring would stretch less than elastic band C. Steel is stiffer and has a higher elastic limit compared to rubber; it requires a greater force to produce the same amount of stretch. Under the same load, the steel spring would extend less than the rubber band.
Marking note: Award 1 mark for stating "less." Award 1 mark for explaining that steel is stiffer / has greater resistance to stretching / higher elastic modulus. Do not accept answers that only say "steel is stronger" without linking to stretch.
19. (a) [2 marks]
Answer (any two of the following):
- Glass is transparent — allows light to pass through so we can see through the window.
- Glass is waterproof — rain cannot pass through, keeping the interior dry.
- Glass is strong (when compressed) — it can withstand wind pressure.
Marking note: Award 1 mark per valid property linked to the function of a window (max 2).
(b) [1 mark]
Answer: Glass does not conduct electricity, so it cannot be used to make electrical wires which need to allow electric current to flow through them.
Marking note: Award 1 mark for stating that glass is an electrical insulator / does not conduct electricity.
(c) [1 mark]
Answer: Glass is brittle and breaks easily when dropped or hit, making it dangerous and impractical for a portable water bottle.
Marking note: Accept any valid disadvantage such as brittleness, heaviness, or fragility.
20. (a) [2 marks]
Answer: Material V. A frying pan must conduct heat well so that heat from the stove is transferred to the food. It must also be strong to withstand daily use and high temperatures. Material V conducts heat and is strong.
Marking note: Award 1 mark for identifying Material V. Award 1 mark for explaining with reference to TWO properties (conducts heat AND strong). Do not award full marks if only one property is mentioned.
(b) [2 marks]
Answer: Material Z. A swimming cap must be waterproof to keep hair dry and flexible so it can stretch to fit different head sizes comfortably. Material Z is both waterproof and flexible.
Marking note: Award 1 mark for identifying Material Z. Award 1 mark for explaining with reference to TWO properties (waterproof AND flexible). Do not award full marks if only one property is mentioned.
END OF ANSWER KEY