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Primary 3 Science Weighted Assessment 2 (Term 3) Paper 3

Free P3 Science WA2 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 WA2 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 is worth 1 mark.

1. Which of the following describes a non-living thing?

(A) It can grow
(B) It needs food
(C) It does not reproduce
(D) It can move by itself

( )

2. An animal that has 6 legs and 3 body parts is called:

(A) A mammal
(B) A reptile
(C) An insect
(D) An amphibian

( )

3. The correct order of a chicken's life cycle is:

(A) Egg → Adult → Chick
(B) Chick → Egg → Adult
(C) Egg → Chick → Adult
(D) Adult → Chick → Egg

( )

4. Which sense organ helps us to hear sounds?

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

( )

5. Priya is at the Singapore Botanic Gardens. She sees a beautiful orchid. Which sense is she using?

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

( )

6. What does the stomach do?

(A) Pumps blood
(B) Helps us breathe
(C) Breaks down food
(D) Helps us think

( )

7. Which of the following groups contains only reptiles?

(A) Frog, toad, newt
(B) Snake, lizard, crocodile
(C) Shark, whale, dolphin
(D) Sparrow, eagle, penguin

( )

8. The pupa stage of a butterfly is also known as:

(A) Caterpillar
(B) Chrysalis
(C) Larva
(D) Wriggler

( )

9. Hafiz goes to the polyclinic for a check-up. The doctor checks his heartbeat. What is the main function of the heart?

(A) To digest food
(B) To pump blood around the body
(C) To help us breathe
(D) To produce sweat

( )

10. Which part of a plant holds the plant upright and supports the leaves?

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

( )

11. Animals that can live both on land and in water are called:

(A) Mammals
(B) Reptiles
(C) Amphibians
(D) Fish

( )

12. How many hours of sleep should a Primary 3 student get each night?

(A) 4-5 hours
(B) 6-7 hours
(C) 9-12 hours
(D) 15-16 hours

( )

13. Which animal goes through complete metamorphosis?

(A) Cockroach
(B) Grasshopper
(C) Housefly
(D) Cricket

( )

14. The skin helps us to feel:

(A) Sound and light
(B) Taste and smell
(C) Temperature and texture
(D) Colours and shapes

( )

15. Which of the following helps to keep us healthy?

(A) Skipping meals
(B) Staying up late every night
(C) Eating a balanced diet
(D) Avoiding exercise

( )

Section B: Short Answer Questions (20 marks)

Answer all questions in the spaces provided.

16. Look at the animals below.

[Dragonfly] [Spider] [Ant] [Beetle]

(a) Which of the animals above is NOT an insect? (1 mark)

(b) Give ONE reason for your answer in (a). (1 mark)

17. The diagram below shows a flowering plant.

Image pending generation for this question.

        [Flower] ← Part A
           |
        [Leaf] ← Part B
           |
        [Stem] ← Part C
           |
        [Roots] ← Part D

(a) Which part (A, B, C, or D) transports water from the roots to the leaves? (1 mark)

(b) Which part produces seeds? (1 mark)

18. Marcus visited the Night Safari with his family.

(a) He saw a bat flying in the air. Is a bat a bird or a mammal? (1 mark)

(b) Give TWO reasons for your answer in (a). (2 marks)

19. Study the table below about the five senses.

Sense	Sense Organ	Function
Sight	Eyes	To see things
Hearing	Ears	To hear sounds
Smell	Nose	To smell things
Taste	Tongue	To taste food
Touch	Skin	To feel things

(a) Auntie Mei is cooking curry at home. Name TWO senses she uses when cooking. (2 marks)

(b) Why is it dangerous if our sense of smell does not work properly? (1 mark)

20. Ali fell down while playing at the playground and hurt his knee.

(a) Which sense organ told Ali that he was hurt? (1 mark)

(b) What should Ali do to take care of his wound? (1 mark)

21. Complete the table about animal groups. (4 marks)

Animal	Animal Group	ONE Characteristic of this Group
Goldfish	__________	Has scales and fins
Penguin	Bird	__________
Cobra	__________	Has dry, scaly skin
Cow	Mammal	__________

Section C: Word Problems (15 marks)

Answer all questions in the spaces provided.

22. Hui Ling planted a mung bean seed in cotton wool for her science experiment.

(a) What THREE things did she give the seed to help it germinate? (3 marks)

(b) After the seed germinated, which part grew first - the root or the shoot? (1 mark)

23. The diagram shows the life cycle of a frog.

[Frog eggs (spawn)] → [Tadpole] → [Tadpole with back legs] → [Tadpole with 4 legs] → [Froglet] → [Adult frog]

(a) How does a tadpole breathe underwater? (1 mark)

(b) How is the adult frog different from a tadpole? State TWO differences. (2 marks)

24. Mr Tan is a PE teacher at Tampines Primary School. He teaches his students about keeping healthy.

(a) Name TWO healthy habits that Mr Tan should teach his students. (2 marks)

(b) Why is exercise important for students? (1 mark)

25. Look at the diagram of the human body and its organs.

    Brain (in head)
         |
    Heart and Lungs (in chest)
         |
    Stomach (in abdomen)

(a) Which organ controls all the activities in our body? (1 mark)

(b) Explain how the heart and lungs work together to keep us alive. (2 marks)

End of Paper

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Answers

TuitionGoWhere Primary 3 Science WA2 2026 (Version 3) - Answer Key

Total Marks: 50

Section A: Multiple Choice Questions (15 marks)

Question	Answer	Explanation
1	C	Non-living things do not reproduce. Living things grow, need food, and can move.
2	C	Insects have 6 legs and 3 body parts (head, thorax, abdomen).
3	C	Chicken life cycle: Egg → Chick → Adult chicken.
4	C	Ears are the sense organs for hearing.
5	B	Priya is using her sense of sight to see the orchid.
6	C	The stomach breaks down food (digestion).
7	B	Snake, lizard, and crocodile are all reptiles.
8	B	The pupa stage of a butterfly is called a chrysalis.
9	B	The heart pumps blood around the body.
10	B	The stem holds the plant upright and supports leaves.
11	C	Amphibians can live both on land and in water.
12	C	Children aged 6-12 need 9-12 hours of sleep.
13	C	Housefly goes through complete metamorphosis (egg, larva, pupa, adult).
14	C	Skin helps us feel temperature and texture.
15	C	Eating a balanced diet helps keep us healthy.

Section B: Short Answer Questions (20 marks)

16. (a) Spider is NOT an insect. (1 mark)

(b) Accept any ONE:

Spider has 8 legs (not 6)
Spider has 2 body parts (not 3)
Spider is an arachnid (1 mark)

All insects have 6 legs
All insects have 3 body parts
All insects have antennae
All insects have an exoskeleton (1 mark)

17. (a) Part C (Stem) transports water from the roots to the leaves. (1 mark)

(b) Part A (Flower) produces seeds. (1 mark)

18. (a) A bat is a mammal. (1 mark)

(b) Accept any TWO: (2 marks - 1 mark each)

It has fur/hair on its body
It gives birth to live young
It feeds its young with milk
It is warm-blooded
It breathes using lungs

19. (a) Accept any TWO: (2 marks - 1 mark each)

Sight (to see the food)
Smell (to smell the curry)
Taste (to taste the curry)
Touch (to feel the heat/texture)

(b) Accept any ONE:

We may not be able to detect gas leaks
We may not smell smoke from a fire
We may eat spoiled/rotten food
We may not detect dangerous smells (1 mark)

20. (a) The skin told Ali that he was hurt. / Ali's sense of touch told him he was hurt. (1 mark)

(b) Accept any ONE:

Clean the wound with water
Apply antiseptic cream/medicine
Put a plaster/bandage on the wound
Tell an adult (1 mark)

To prevent germs from entering the wound
To prevent infection
To help the wound heal faster (1 mark)

21. (4 marks - 1 mark each)

Animal	Animal Group	ONE Characteristic of this Group
Goldfish	Fish	Has scales and fins
Penguin	Bird	Has feathers / Lays eggs / Has a beak
Cobra	Reptile	Has dry, scaly skin
Cow	Mammal	Has fur / Gives birth to live young / Feeds young with milk

Section C: Word Problems (15 marks)

22. (a) The THREE things are: (3 marks - 1 mark each)

Water
Warmth / suitable temperature
Air / oxygen

(b) The root grew first. (1 mark)

The root grows first to absorb water for the plant
The root grows first to anchor the plant in place
The root provides stability and nutrients for growth (1 mark)

23. (a) A tadpole breathes underwater using gills. (1 mark)

(b) Accept any TWO differences: (2 marks - 1 mark each)

Adult frog has legs / Tadpole has no legs
Adult frog has lungs / Tadpole has gills
Adult frog has no tail / Tadpole has a tail
Adult frog can live on land / Tadpole lives only in water
Adult frog eats insects / Tadpole eats plants

The eggs need water to stay moist
Tadpoles live and breathe in water
Eggs would dry out without water (1 mark)

24. (a) Accept any TWO: (2 marks - 1 mark each)

Exercise regularly
Eat healthy food / balanced diet
Drink plenty of water
Get enough sleep (9-12 hours)
Wash hands before eating
Brush teeth twice a day

(b) Accept any ONE:

Exercise keeps our body strong and healthy
Exercise keeps our muscles and bones strong
Exercise helps us stay fit
Exercise helps our heart stay healthy (1 mark)

Ahmad should sleep 9-12 hours every night
Ahmad should sleep earlier
Ahmad needs more sleep to grow and stay healthy
Not getting enough sleep can make Ahmad tired and unable to concentrate (1 mark)

25. (a) The brain controls all the activities in our body. (1 mark)

(b) The lungs take in oxygen from the air we breathe. (1 mark) The heart pumps blood containing oxygen to all parts of the body. / The heart and lungs work together to supply oxygen to the body and remove carbon dioxide. (1 mark)

End of Answer Key

Marking Scheme Summary

Section	Questions	Marks
A	MCQ (1-15)	15
B	Short Answer (16-21)	20
C	Word Problems (22-25)	15
Total		50