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Primary 3 Science Diversity Materials Quiz

Free P3 Science Diversity Materials quiz, Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 3 Science From Real Exams Generated by DeepSeek V4 Flash Sample 01 Updated 2026-08-17

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Questions

Primary 3 Science Quiz - Diversity Materials

Name: _________________________ Class: _________________________ Date: _________________________ Score: ________ / 40

Duration: 40 minutes Total Marks: 40

Instructions:

Read each question carefully.
Answer all questions in the spaces provided.
Show your working or reasoning where needed.
The total marks for each question is shown in brackets at the end of the question.

Section A: Multiple-Choice Questions (Questions 1 - 5)

Circle the correct answer for each question. Each question is worth 2 marks.

Q1. A teacher wants to buy a new raincoat for a school trip. Which material would be the most suitable for making a raincoat?

(A) Cotton cloth, because it is soft and comfortable.
(B) Plastic sheet, because it is waterproof and does not absorb water.
(C) Metal sheet, because it is strong and hard.
(D) Paper, because it is light and easy to fold.

[2 marks]

Q2. Which of the following objects is made from a natural material?

(A) A plastic drinking bottle
(B) A glass window pane
(C) A wooden chair
(D) A nylon school bag

[2 marks]

Q3. A student drops a steel ball and a wooden ball of the same size into a tank of water. The steel ball sinks, but the wooden ball floats. What can be concluded about the materials?

(A) Wood is heavier than steel.
(B) Steel is stronger than wood.
(C) Wood is less dense than water, while steel is denser than water.
(D) Steel is waterproof, while wood is not.

[2 marks]

Q4. Which property of glass makes it suitable for making windows in a classroom?

(A) It is flexible.
(B) It allows most light to pass through.
(C) It is a good conductor of heat.
(D) It is very soft.

[2 marks]

Q5. A rubber band can be stretched and bent without breaking. Which property does the rubber band have?

(A) Strength
(B) Flexibility
(C) Transparency
(D) Waterproof

[2 marks]

Section B: Matching and Classification (Questions 6 - 10)

Q6. Match each material in Column A to its correct property in Column B. Write the letter of the correct property in the box provided.

Column A (Material)	Column B (Property)
1. Metal	A. Allows most light to pass through
2. Glass	B. Can be bent easily without breaking
3. Rubber	C. Does not absorb water
4. Fabric (cotton)	D. Strong and hard

Material	Answer
1. Metal
2. Glass
3. Rubber
4. Fabric (cotton)

[4 marks]

Q7. The objects below are made of different materials. Classify them into Natural Materials and Man-made Materials by writing their letters in the correct columns.

(A) A cotton T-shirt
(B) A plastic toy car
(C) A wooden pencil
(D) A glass bottle

Natural Materials	Man-made Materials

[2 marks]

Q8. A student has four blocks made of different materials: wood, metal, plastic, and sponge. She places them on a table and presses each one with her finger. The results are shown below.

Material	What Happens When Pressed
Wood	Does not change shape
Metal	Does not change shape
Plastic	Does not change shape
Sponge	Changes shape and becomes smaller

Based on the results, which material is the softest? Explain your answer.

[2 marks]

Q9. Look at the following objects. For each object, state one property of the material it is made of that makes it suitable for its use.

Object	Material	Property that makes it suitable
(a) Cooking pot	Metal
(b) Raincoat	Plastic
(c) Window	Glass

[3 marks]

Q10. A student wants to make a toy boat that can carry small objects in a puddle of water. She has a piece of wood and a piece of metal of the same size. Which material should she use? Give a reason for your answer.

[2 marks]

Section C: Short-Answer Questions (Questions 11 - 15)

Q11. The table below shows the properties of four different materials, P, Q, R, and S.

Material	Floats in Water	Waterproof	Allows Light to Pass Through
P	Yes	Yes	No
Q	No	Yes	Yes
R	Yes	No	No
S	No	No	Yes

(a) Which material, P, Q, R, or S, would be the most suitable for making an umbrella? Give a reason for your answer.

[2 marks]

(b) Which material, P, Q, R, or S, would be the most suitable for making a window? Give a reason for your answer.

[2 marks]

Q12. A baker uses a metal tray to bake a cake in a hot oven. Explain why metal is a suitable material for the baking tray.

[2 marks]

Q13. A student has two cups. Cup A is made of paper and Cup B is made of plastic. She pours the same amount of water into both cups and leaves them on the table for one hour.

(a) What do you think will happen to Cup A after one hour?

[1 mark]

(b) Explain your answer in (a) using the property of the material.

[1 mark]

Q14. A builder needs to choose a material to make a strong bridge that can hold heavy trucks. He has wood, plastic, and metal. Which material should he choose? Explain why.

[2 marks]

Q15. A diver wears a wetsuit made of a special material to keep warm in cold water. The material does not let water pass through it. What is this property called?

[1 mark]

Section D: Application and Reasoning (Questions 16 - 20)

Q16. A group of students tested four different materials to find out if they could float in water. They placed equal-sized cubes of each material into a tank of water. The results are shown in the diagram below.

Diagram for Q16 (P3 Science)

Generated diagram for Q16.

(a) Which cube(s) are made of a material that floats in water?

[1 mark]

(b) Which cube(s) are made of a material that sinks in water?

[1 mark]

Q17. A student wants to make a kite. She has a piece of thin plastic sheet and a piece of thick cardboard. Which material is more suitable for the kite? Explain your answer using the properties of the materials.

[2 marks]

Q18. The picture shows a pair of rubber gloves used for washing dishes.

Figure for Q18 (P3 Science)

Generated figure for Q18.

(a) Give one property of rubber that makes it suitable for making washing gloves.

[1 mark]

(b) Give another property of rubber that makes it suitable for making washing gloves.

[1 mark]

Q19. A scientist is testing two materials, X and Y, to see if they are waterproof. She places a drop of water on each material and observes what happens.

Material	Observation after 5 minutes
X	The water stays as a droplet on the surface.
Y	The water is absorbed into the material.

(a) Which material, X or Y, is waterproof?

[1 mark]

(b) Give one example of an object that should be made of the waterproof material.

[1 mark]

Q20. A window in a classroom is made of glass. However, the school wants to replace it with a material that is stronger and will not break easily to make the classroom safer.

(a) Suggest a suitable material to replace the glass.

[1 mark]

(b) Explain why your suggested material is more suitable than glass for this purpose.

[2 marks]

END OF QUIZ

Answer Key

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Answers

Answer Key - Primary 3 Science Quiz - Diversity Materials

Total Marks: 40

Section A: Multiple-Choice Questions (Questions 1 - 5)

Q1. (B) Plastic sheet, because it is waterproof and does not absorb water.

Marks: 2
Explanation: A raincoat must keep the person dry. A waterproof material like plastic does not absorb water, so it is the most suitable. Cotton absorbs water, metal is too stiff and heavy, and paper would tear and absorb water.

Q2. (C) A wooden chair

Marks: 2
Explanation: Wood comes from trees, which are natural. Plastic, glass, and nylon are all man-made materials that are processed in factories.

Q3. (C) Wood is less dense than water, while steel is denser than water.

Marks: 2
Explanation: An object floats if it is less dense than water and sinks if it is denser than water. The steel ball sinks because it is denser than water, while the wooden ball floats because it is less dense than water. (Note: "heavier" is not a good comparison since they are the same size; we need to compare density.)

Q4. (B) It allows most light to pass through.

Marks: 2
Explanation: Windows are meant to let light into a room. Glass is transparent, meaning it allows most light to pass through, making it suitable for windows.

Q5. (B) Flexibility

Marks: 2
Explanation: Flexibility is the ability to bend without breaking. A rubber band can be stretched and bent, so it is flexible.

Section B: Matching and Classification (Questions 6 - 10)

Q6.

Material	Answer
1. Metal	D
2. Glass	A
3. Rubber	B
4. Fabric (cotton)	C

Marks: 4 (1 mark for each correct match)
Explanation:
- Metal is typically strong and hard.
- Glass allows most light to pass through (transparent).
- Rubber can be bent easily without breaking (flexible).
- Fabric (cotton) absorbs water, meaning it is not waterproof.

Q7.

Natural Materials	Man-made Materials
A (cotton T-shirt)	B (plastic toy car)
C (wooden pencil)	D (glass bottle)

Marks: 2 (1 mark for each correct column; both items must be correct in a column to earn the mark)
Explanation: Cotton comes from the cotton plant, and wood comes from trees. These are natural materials. Plastic and glass are made by humans through manufacturing processes.

Q8. Sponge.

Marks: 2 (1 mark for identifying sponge, 1 mark for explanation)
Explanation: The sponge changed shape and became smaller when pressed, which shows it is the softest. The other materials (wood, metal, plastic) did not change shape, meaning they are harder.

Q9.

Object	Material	Property that makes it suitable
(a) Cooking pot	Metal	Strong / hard / does not melt easily in heat
(b) Raincoat	Plastic	Waterproof / does not absorb water
(c) Window	Glass	Allows light to pass through / transparent

Marks: 3 (1 mark for each correct property)
Explanation:
- (a) Metal is strong and can withstand high heat without melting, making it suitable for cooking pots.
- (b) Plastic is waterproof, so it keeps the person dry.
- (c) Glass allows most light to pass through, so we can see through it and light enters the room.

Q10. Wood.

Marks: 2 (1 mark for material, 1 mark for reason)
Explanation: Wood floats in water, so the toy boat will stay on the surface of the puddle. Metal sinks, so a metal boat would not float.

Section C: Short-Answer Questions (Questions 11 - 15)

Q11. (a) Material P.

Marks: 2 (1 mark for material, 1 mark for reason)
Explanation: An umbrella needs to be waterproof to keep the person dry. Material P is waterproof. It also floats, which is not necessary but does not matter. Materials Q, R, and S are not waterproof.

(b) Material Q.

Marks: 2 (1 mark for material, 1 mark for reason)
Explanation: A window needs to allow light to pass through. Material Q allows light to pass through. It is also waterproof, which is good for a window to keep rain out.

Q12. Metal is strong and hard, so it can hold the cake without breaking. It can also withstand the high heat of the oven without melting or getting damaged.

Marks: 2 (1 mark for strength/hardness, 1 mark for withstanding heat)
Explanation: A baking tray must be strong enough to hold the cake and must not melt or deform in a hot oven. Metal has these properties.

Q13. (a) Cup A (paper cup) will become soft and may leak or break.

Marks: 1
Explanation: Paper absorbs water.

(b) Paper is not waterproof / paper absorbs water.

Marks: 1
Explanation: The paper cup absorbs the water, causing it to weaken and possibly leak. Plastic is waterproof and does not absorb water.

Q14. Metal.

Marks: 2 (1 mark for material, 1 mark for explanation)
Explanation: Metal is strong and hard, so it can withstand the heavy weight of the trucks without breaking. Wood and plastic are not as strong as metal.

Q15. Waterproof.

Marks: 1
Explanation: A material that does not let water pass through it is called waterproof.

Section D: Application and Reasoning (Questions 16 - 20)

Q16. (a) Cubes A and B.

Marks: 1
Explanation: The diagram shows cubes A and B floating on the water surface. This means they are made of materials that float.

(b) Cubes C and D.

Marks: 1
Explanation: The diagram shows cubes C and D resting at the bottom of the tank. This means they are made of materials that sink.

(c) Cube A is made of a material that is less dense than the material of Cube B (or Cube A's material is "lighter" for its size).

Marks: 1
Explanation: A cube that floats higher in the water is less dense. Since Cube A floats higher than Cube B, its material is less dense.

Q17. Thin plastic sheet.

Marks: 2 (1 mark for material, 1 mark for explanation)
Explanation: A kite needs to be light so it can be carried by the wind. The thin plastic sheet is light and flexible, making it easier for the kite to fly. Cardboard is thick, heavy, and stiff, which would make the kite too heavy to fly well.

Q18. (a) Waterproof (does not absorb water).

Marks: 1
Explanation: Rubber gloves keep the hands dry when washing dishes.

(b) Flexible (can be bent easily).

Marks: 1
Explanation: The gloves need to be flexible so the person can move their fingers easily to hold and wash the dishes.

Q19. (a) Material X.

Marks: 1
Explanation: The water stays as a droplet on the surface of Material X, meaning it does not absorb water. This is the definition of waterproof.

(b) Raincoat / umbrella / rain boots (any suitable example).

Marks: 1
Explanation: Objects that need to keep things dry should be made of waterproof materials.

Q20. (a) Plastic (or a strong, shatter-resistant material).

Marks: 1
Explanation: Plastic is strong and does not break easily.

(b) Plastic is stronger and more flexible than glass, so it will not shatter into sharp pieces if hit. This makes it safer for a classroom.

Marks: 2 (1 mark for strength, 1 mark for safety/flexibility)
Explanation: Glass can break into sharp, dangerous shards. Plastic is more durable and will not break as easily, making it a safer choice for a classroom window.

END OF ANSWER KEY