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Primary 3 Science Weighted Assessment 3 (Term 3) Paper 3

Free P3 Science WA3 Paper 3, Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Primary 3 Science From Real Exams Generated by Claude Sonnet 4 Updated 2026-08-17

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Questions

TuitionGoWhere Primary 3 Science

Weighted Assessment 3 (2026) - Version 3

Name: _________________________________ Class: _______ Date: ___________

Duration: 45 minutes
Total Marks: 50

Section A: Multiple Choice Questions (15 marks)

Choose the correct answer and write the letter (A, B, C, or D) in the brackets provided. Each question carries 1 mark.

1. Which of the following shows the correct life cycle of a butterfly?

(A) Egg → Pupa → Caterpillar → Adult butterfly
(B) Egg → Caterpillar → Pupa → Adult butterfly
(C) Caterpillar → Egg → Pupa → Adult butterfly
(D) Pupa → Egg → Caterpillar → Adult butterfly

( )

2. Which part of a plant absorbs water and minerals?

(A) Flower
(B) Leaf
(C) Stem
(D) Root

( )

3. A dog, a cat, and a rabbit all:

(A) Lay eggs
(B) Have scales
(C) Give birth to live young
(D) Live in water

( )

4. What do we call things that were once living but are no longer alive?

(A) Living things
(B) Non-living things
(C) Dead things
(D) Man-made things

( )

5. Which sense helps us know if food has gone bad?

(A) Sight
(B) Hearing
(C) Smell
(D) Touch

( )

6. Which of these materials comes from plants?

(A) Leather
(B) Silk
(C) Wool
(D) Cotton

( )

7. A tadpole uses ____________ to breathe.

(A) Lungs
(B) Gills
(C) Skin
(D) Nose

( )

8. Which is NOT a function of the stem?

(A) Transport water
(B) Support the plant
(C) Absorb minerals
(D) Hold leaves and flowers

( )

9. Which sense organ do we use to detect sweet and sour tastes?

(A) Nose
(B) Skin
(C) Tongue
(D) Eyes

( )

10. What does a seed need to germinate?

(A) Light, soil, and fertilizer
(B) Water, air, and warmth
(C) Flowers, leaves, and stem
(D) Food, toys, and sunshine

( )

11. Which animal lays eggs?

(A) Dog
(B) Cat
(C) Turtle
(D) Whale

( )

12. Living things respond to ____________.

(A) Changes in their surroundings
(B) Colors and shapes
(C) Man-made objects
(D) Non-living things only

( )

13. Which part of a plant is usually found below the ground?

(A) Stem
(B) Leaf
(C) Flower
(D) Root

( )

14. A chick is the young of a:

(A) Duck
(B) Chicken
(C) Sparrow
(D) All of the above

( )

15. Our skin helps us detect:

(A) Sound and light
(B) Smell and taste
(C) Touch and temperature
(D) Color and shape

( )

Section B: Short Answer Questions (20 marks)

Answer all questions in the spaces provided.

16. List four characteristics of living things. (4 marks)

(a) _______________________________________________

(b) _______________________________________________

(d) _______________________________________________

17. Look at the animals below. Put them into two groups based on how they are born. (5 marks)

Animals: Hen, Dog, Crocodile, Rabbit, Fish

Animals that lay eggs	Animals that give birth to live young

18. Complete the table about plant parts and their functions. (4 marks)

Plant Part	Function
Root
Stem
Leaf
Flower

19. Fill in the blanks about the life cycle of a butterfly. (4 marks)

A butterfly lays its ____________ on a leaf. The egg hatches into a ____________ which eats leaves. It then becomes a ____________ and stays still. Finally, it comes out as an adult ____________.

20. Name the sense organ you would use in each situation. (3 marks)

(a) To know if a drink is hot: _______________

(b) To tell if there is music playing: _______________

Section C: Word Problems / Structured Questions (15 marks)

Answer all questions in the spaces provided.

21. Mei Ling visited a farm. She saw chickens, frogs, and butterflies. (5 marks)

(a) Name the animal that goes through the most stages in its life cycle. How many stages? (2 marks)

(b) What stage in the frog's life cycle lives only in water? (1 mark)

22. Look at the items below and answer the questions. (5 marks)

Items: Glass bottle, Wooden spoon, Plastic bag, Rubber band, Cotton cloth

(a) Which items are made from natural materials? (2 marks)

(b) Which items are made from man-made materials? (2 marks)

23. Ali wants to grow tomato plants from seeds. (5 marks)

(a) List three things Ali needs to provide for the seeds to germinate. (3 marks)

(b) After the plant grows, which part will Ali see the tomatoes growing from? (1 mark)

End of Paper

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Answers

TuitionGoWhere Primary 3 Science

Weighted Assessment 3 (2026) - Version 3 Answer Key

Duration: 45 minutes
Total Marks: 50

Section A: Multiple Choice Questions (15 marks)

Question	Answer	Explanation
1	(B)	Correct butterfly life cycle: Egg → Caterpillar → Pupa → Adult butterfly.
2	(D)	Roots absorb water and minerals from the soil.
3	(C)	Dogs, cats, and rabbits are mammals that give birth to live young.
4	(C)	Things that were once living but no longer alive are called dead things.
5	(C)	Smell helps us detect if food has gone bad (spoiled food has a bad odor).
6	(D)	Cotton comes from cotton plants. Leather is from animals, silk from silkworms, wool from sheep.
7	(B)	Tadpoles breathe using gills because they live in water.
8	(C)	Absorbing minerals is the job of roots, not the stem.
9	(C)	The tongue is the sense organ for taste.
10	(B)	Seeds need water, air, and warmth to germinate.
11	(C)	Turtles lay eggs. Dogs, cats, and whales give birth to live young.
12	(A)	Living things respond to changes in their surroundings (stimuli).
13	(D)	Roots are usually found below the ground.
14	(B)	A chick specifically refers to the young of a chicken.
15	(C)	Our skin helps us detect touch (pressure) and temperature (hot/cold).

Section B: Short Answer Questions (20 marks)

16. Four characteristics of living things (4 marks)

Accept any four of: (a) They need food / They eat (b) They grow (c) They reproduce / They have young (d) They move / They can move (e) They breathe / They need air (f) They respond to changes in their surroundings (g) They get rid of waste

Award 1 mark for each correct characteristic.

17. Grouping animals by how they are born (5 marks)

Animals that lay eggs	Animals that give birth to live young
Hen	Dog
Crocodile	Rabbit
Fish

Award 1 mark for each correctly placed animal.

18. Plant parts and functions (4 marks)

Plant Part	Function
Root	Absorbs water and minerals from the soil / Holds the plant in the ground
Stem	Transports water and minerals / Supports the plant
Leaf	Makes food for the plant
Flower	Makes seeds / Helps the plant reproduce

Award 1 mark for each correct function. Accept any reasonable answer.

19. Butterfly life cycle fill-in-the-blanks (4 marks)

A butterfly lays its eggs on a leaf. The egg hatches into a caterpillar which eats leaves. It then becomes a pupa and stays still. Finally, it comes out as an adult butterfly.

Award 1 mark for each correct word.

20. Sense organs for different situations (3 marks)

(a) To know if a drink is hot: Skin / Fingers / Hand (sense of touch)

(b) To tell if there is music playing: Ears (sense of hearing)

Award 1 mark for each correct answer.

Section C: Word Problems / Structured Questions (15 marks)

21. Farm visit questions (5 marks)

(a) Name the animal with most life cycle stages and how many (2 marks)

Butterfly (1 mark) - 4 stages (1 mark) (Egg → Caterpillar → Pupa → Adult butterfly)

(b) What stage in frog's life cycle lives only in water? (1 mark)

Tadpole

Accept any two of:

Both start from an egg (1 mark)
Both hatch from eggs (1 mark)
Both go through stages before becoming adults (1 mark)
Both are animals that lay eggs (1 mark)

22. Materials questions (5 marks)

(a) Items made from natural materials (2 marks)

Wooden spoon, Rubber band, Cotton cloth

Award 1 mark for any two correct answers.

(b) Items made from man-made materials (2 marks)

Glass bottle, Plastic bag

Award 1 mark for each correct answer.

Accept any reasonable answer:

To know how to recycle properly
To know if it is safe to use
To know how to dispose of it correctly
To know if it is good for the environment
To choose the right material for different uses

23. Growing tomato plants (5 marks)

(a) Three things for seeds to germinate (3 marks)

Water
Air
Warmth / Suitable temperature

Award 1 mark for each correct answer.

(b) Which part will tomatoes grow from? (1 mark)

Flower (Tomatoes are the fruit that develops from flowers)

To absorb water and minerals from the soil OR To hold the plant firmly in the ground

Marking Summary

Section	Marks
Section A: MCQ	15
Section B: Short Answer	20
Section C: Structured Questions	15
Total	50

End of Answer Key