Primary 5 Science Materials Quiz

TuitionGoWhere Primary School (AI)

Primary 5 Science - Materials

Quiz 01 | Pre-PSLE Preparation

Name: _________________________ Date: _____________ Score: ___ / 50

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Section A: Multiple Choice Questions (2 marks each)

1. Which of the following materials is a good conductor of heat?

• A) Plastic
• B) Wood
• C) Copper
• D) Rubber

2. A substance that allows light to pass through completely is called:

• A) Opaque
• B) Transparent
• C) Translucent
• D) Reflective

3. Which property of rubber makes it suitable for making tyres?

• A) It is hard
• B) It is flexible
• C) It conducts electricity
• D) It is brittle

4. What happens to most metals when they are heated?

• A) They contract
• B) They expand
• C) They remain the same size
• D) They become lighter

5. Which material would be BEST for making a cooking pot?

• A) Plastic (poor conductor of heat)
• B) Glass (breaks easily when heated)
• C) Metal (good conductor of heat)
• D) Wood (burns easily)

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Section B: True or False (2 marks each)

Write 'T' for True or 'F' for False.

6. All metals are attracted to magnets. _____

7. Water is a better conductor of heat than air. _____

8. Rubber is an electrical insulator. _____

9. Glass is a natural material. _____

10. Materials that allow some light to pass through are called translucent. _____

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Section C: Short Answer Questions (4 marks each)

11. The table shows some properties of materials:

Material	Conducts electricity	Conducts heat	Magnetic
Iron	Yes	Yes	Yes
Copper	Yes	Yes	No
Plastic	No	No	No
Aluminium	Yes	Yes	No

(a) Which material would be best for making electrical wires? Why?

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(b) Why are pot handles often made of plastic?

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12. Explain why: (a) Windows are made of glass and not wood.

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(b) Electrical plugs have plastic casings but metal pins.

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13. A student wants to test which material is the best insulator of heat. He wraps ice cubes in different materials and measures how long it takes for the ice to melt.

(a) What should he keep constant in this experiment?

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(b) Which ice cube will melt the slowest - the one wrapped in aluminium foil, cotton, or plastic? Explain.

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Section D: Structured Questions (5 marks each)

14. Look at the objects below and answer the questions:

• Copper wire
• Wooden spoon
• Glass window
• Rubber band
• Iron nail

(a) Classify these objects based on whether they conduct electricity or not. (2 marks)

Conductors: _______________________________________________________

Insulators: _______________________________________________________

(b) Which object(s) can be attracted by a magnet? (1 mark)

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(c) The copper wire is coated with plastic. Explain why this is necessary. (2 marks)

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15. A manufacturer needs to choose materials for making a thermos flask (vacuum flask) to keep drinks hot.

(a) What property should the inner container have? (1 mark)

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(b) Why is there a vacuum (empty space with no air) between the inner and outer walls? (2 marks)

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(c) Why is the inner surface often shiny/reflective? (2 marks)

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Section E: Higher-Order Thinking (5 marks)

16. Study the situation below:

A chef needs to choose materials for a new frying pan. The options are:

• Pan A: Made entirely of aluminium
• Pan B: Made of aluminium with a wooden handle
• Pan C: Made entirely of ceramic (clay)

(a) Which pan would be the safest and most practical choice? Explain your answer. (3 marks)

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(b) Some frying pans have a non-stick coating. What advantage does this provide? (1 mark)

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(c) Why are aluminium pans better conductors of heat than ceramic pans? What effect does this have on cooking? (1 mark)

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End of Quiz

TuitionGoWhere Primary School (AI)

Primary 5 Science - Materials

Quiz 01 | Answer Key

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Section A: Multiple Choice Questions (2 marks each)

1. C) Copper

Metals like copper are good conductors of heat

2. B) Transparent

Transparent materials allow light to pass through completely

3. B) It is flexible

Rubber's flexibility allows tyres to absorb shocks and grip the road

4. B) They expand

Most materials, including metals, expand when heated

5. C) Metal (good conductor of heat)

Metal conducts heat well, allowing food to cook evenly

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Section B: True or False (2 marks each)

6. F (False)

Only iron, steel, nickel, and cobalt are magnetic. Metals like aluminium and copper are not attracted to magnets.

7. T (True)

Water conducts heat better than air because water molecules are closer together.

8. T (True)

Rubber does not conduct electricity, making it an insulator.

9. F (False)

Glass is a man-made material, made from sand (silica) and other substances.

10. T (True)

Translucent materials allow some light to pass through but scatter it.

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Section C: Short Answer Questions (4 marks each)

11. (a) Copper would be best for making electrical wires because it is a good conductor of electricity (allows electricity to flow through easily) and is not as expensive as silver. (2 marks)

(b) Pot handles are often made of plastic because plastic is a poor conductor of heat (heat insulator). This prevents heat from the pot from reaching our hands and burning us. (2 marks)

12. (a) Windows are made of glass because glass is transparent, allowing light to pass through so we can see outside and let natural light into the room. Wood is opaque and would block light. (2 marks)

(b) Electrical plugs have plastic casings to prevent electric shock since plastic is an insulator that does not conduct electricity. The metal pins conduct electricity to transfer power from the socket to the appliance. (2 marks)

13. (a) To keep constant:

• Size of ice cubes
• Amount/thickness of material used to wrap
• Starting temperature of ice
• Surrounding temperature/location (2 marks for any 2 correct answers)

(b) The ice cube wrapped in cotton or plastic will melt the slowest because they are poor conductors of heat (good insulators). They prevent heat from the surroundings from reaching the ice quickly. Aluminium foil is a good conductor, so heat will transfer quickly to the ice, causing it to melt faster. (2 marks)

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Section D: Structured Questions (5 marks each)

14. (a) Conductors: Copper wire, Iron nail (1 mark) Insulators: Wooden spoon, Glass window, Rubber band (1 mark)

(b) Iron nail (1 mark)

Only iron is magnetic among the listed objects

(c) The copper wire is coated with plastic because:

• Plastic is an electrical insulator (1 mark)
• The plastic coating prevents electric shock when we touch the wire and prevents short circuits when wires come into contact with each other (1 mark)

15. (a) The inner container should be a poor conductor of heat / good heat insulator. (1 mark)

(b) A vacuum contains no air particles, so heat cannot be transferred by conduction or convection. This prevents heat from escaping from the hot drink or entering from outside, keeping the drink hot (or cold) for longer. (2 marks)

(c) The shiny/reflective inner surface reflects heat radiation back into the flask. This prevents heat loss through radiation, helping to keep the drink hot for longer. (2 marks)

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Section E: Higher-Order Thinking (5 marks)

16. (a) Pan B (aluminium with wooden handle) would be the safest and most practical choice because:

• The aluminium base conducts heat well, allowing food to cook quickly and evenly (1 mark)
• The wooden handle is a poor conductor of heat, so it stays cool and prevents burns when holding the pan (1 mark)
• Pan A would have a hot handle that could burn the user; Pan C (ceramic) doesn't conduct heat as well and may crack with sudden temperature changes (1 mark)

(b) Non-stick coating prevents food from sticking to the pan, making cooking and cleaning easier. It also allows cooking with less oil. (1 mark)

(c) Aluminium is a metal and metals have free-moving electrons that transfer heat energy quickly. This means aluminium pans heat up faster and distribute heat more evenly, allowing food to cook faster and more uniformly. (1 mark)

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Marking Scheme

Section	Questions	Total Marks
A	1-5	10
B	6-10	10
C	11-13	12
D	14-15	10
E	16	5
Total		47

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End of Answer Key