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Primary 3 Science Semestral Assessment 2 (End of Year) Paper 2

Free P3 Science SA2 Paper 2, HY3 Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.

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Questions

TuitionGoWhere Exam Practice (AI) - Science Primary 3

School: TuitionGoWhere Exam Practice (AI)
Subject: Science
Level: Primary 3
Paper: SA2 Practice Paper (Version 2 of 5)
Duration: 60 minutes
Total Marks: 40
Name: ___________________________
Class: __________
Date: ____________

Instructions:

This paper has 20 questions on the topic of Diversity.
Section A: 10 multiple-choice questions (1 mark each).
Section B: 6 short-answer questions (2 marks each).
Section C: 4 structured questions (1–3 marks each).
Write your answers clearly in the spaces provided.

Section A (10 marks)

Choose the correct answer for each question.

Which of the following is a living thing?
(a) A plastic flower
(b) A wooden chair
(c) A cat
(d) A toy robot
Which characteristic shows that a plant is living?
(a) It is green
(b) It grows from a small seed into a bigger plant
(c) It is placed in a pot
(d) It does not move
An animal has feathers and lays eggs. Which group does it belong to?
(a) Fish
(b) Bird
(c) Mammal
(d) Insect
Which of these is NOT a material?
(a) Wood
(b) Plastic
(c) Happiness
(d) Glass
A raincoat keeps a person dry. Which property of the material is most important?
(a) It is transparent
(b) It is waterproof
(c) It is heavy
(d) It is hard
Which of the following is a fungus?
(a) Fern
(b) Mushroom
(c) Grass
(d) Rose
A material lets some light pass through but objects behind it cannot be seen clearly. This material is most likely:
(a) Transparent
(b) Opaque
(c) Not a real property for P3
(d) Wooden
Which animal breathes through gills and has scales?
(a) Frog
(b) Lizard
(c) Fish
(d) Bird
Which of the following is a natural material?
(a) Nylon
(b) Cotton
(c) Plastic
(d) Glass
Bacteria are:
(a) Non-living things
(b) A type of plant
(c) Living microorganisms
(d) A kind of rock

Section B (12 marks)

Answer each question in the space provided.

Name two characteristics that show a dog is a living thing. (2 marks)
Classify the following into living and non-living things:
Rose, book, mosquito, spoon. (2 marks)
Living: ____________________
Non-living: ________________
State one property of rubber that makes it suitable for making shoe soles. (2 marks)
Give one example of a mammal and one example of a reptile. (2 marks)
Mammal: ____________ Reptile: ____________
Why is wood used to make tables? Give one reason linked to its property. (2 marks)
Some bacteria are useful. Give one example of how bacteria can be useful to humans. (2 marks)

Section C (18 marks)

Answer the following structured questions.

Look at the table below showing four objects.

Object Living or Non-living? Reason
Cloud
Tree
Ball
Yeast
(a) Fill in the table. (4 marks: 1 mark each)
(b) Explain why yeast is classified as you did. (1 mark)
A student tests three materials: plastic, paper, and metal.
(a) Which material will sink in water? (1 mark)
(b) Which material is waterproof? (1 mark)
(c) Give one use of metal based on its strength. (1 mark)
The picture shows six animals.

Diagram for Q19 (P3 Science)

Generated diagram for Q19.

(a) Which animals have scales? (1 mark)  
(b) Which animal is an amphibian? (1 mark)  
(c) Name the group of animal C. (1 mark)

20. Read the passage:
"Mould grows on bread left in a damp place. Mould is a fungus. Some fungi are eaten by people, like mushrooms. Bacteria are tiny living things that can be found in yogurt."
(a) Is mould living or non-living? Why? (2 marks)
(b) Name one fungus that is safe to eat. (1 mark)
(c) Give one place where bacteria can be found from the passage. (1 mark)

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Answers

Answer Key - SA2 Practice Paper Version 2 (Primary 3 Science: Diversity)

Total Marks: 40

Section A (10 marks)

(c) A cat
Teaching note: Living things need food, water, air, can grow and reproduce. Cat is an animal (living). Plastic flower, chair, toy robot are non-living made by humans.
(b) It grows from a small seed into a bigger plant
Teaching note: Growth is a characteristic of living things. Green colour or pot does not prove life; plants also respond and reproduce.
(b) Bird
Teaching note: Birds have feathers and lay eggs. Fish have scales/gills; mammals have fur and live babies; insects have wings/exoskeleton.
(c) Happiness
Teaching note: Materials are physical substances (wood, plastic, glass). Happiness is a feeling, not a material.
(b) It is waterproof
Teaching note: Waterproof means material does not absorb water, keeping rain out. Transparent is about light, not water.
(b) Mushroom
Teaching note: Mushroom is a fungus. Fern/grass/rose are plants.
(a) Transparent / (c) not real property — per syllabus note, P3 uses "most, some, or none light" not formal terms; but among options, "transparent" lets light through. However, question says cannot see clearly → actually this is ambiguous; for P3, answer expected: (a) is wrong because transparent = clear see-through. Since formal terms not required, best is (c) Not a real property for P3.
Mark: (c)
Teaching note: MOE P3 does not require transparent/translucent/opaque terms. So (c) is the syllabus-aligned choice.
(c) Fish
Teaching note: Fish breathe through gills and have scales. Frog (amphibian) has moist skin; lizard (reptile) lungs; bird lungs.
(b) Cotton
Teaching note: Cotton is natural from plants. Nylon/plastic/glass are man-made.
(c) Living microorganisms
Teaching note: Bacteria are living things, not plants/rocks. They are microorganisms.

Section B (12 marks)

(2 marks) Any two:
- Needs food and water
- Can grow
- Can reproduce
- Can move by itself
- Responds to stimuli
  Marking: 1 mark per correct characteristic.
(2 marks)
Living: rose, mosquito
Non-living: book, spoon
Marking: 1 mark for each correct group list.
(2 marks) Rubber is flexible (bends without breaking) OR rubber is soft/comfortable.
Marking: Property named (1) + links to shoe use (1).
(2 marks) Mammal: e.g., cat/dog/human; Reptile: e.g., snake/lizard/turtle.
Marking: 1 mark each.
(2 marks) Wood is strong/hard, so it can support weight without breaking.
Marking: Property (1) + reason (1).
(2 marks) Example: bacteria help make yogurt / break down food in stomach / used in composting.
Marking: 1 mark example, 1 mark it is useful.

Section C (18 marks)

(a) Table (4 marks)
Cloud – Non-living – does not grow/reproduce/need food
Tree – Living – grows, needs air/water
Ball – Non-living – made by humans, no life processes
Yeast – Living – fungus, reproduces/grows
(b) (1 mark) Yeast is a fungus and shows life processes like growth.
(3 marks)
(a) Metal (1)
(b) Plastic (1) [paper absorbs water, metal may rust but not absorb like paper; plastic waterproof]
(c) Metal used for pans/bridges/tools because strong (1)
(3 marks) Based on image_placeholder Q19-fig1:
(a) A (fish) and D (snake) have scales (1)
(b) F (frog) is amphibian (1)
(c) C is mammal (cat) (1)
(4 marks)
(a) Mould is living (1) because it grows on bread and is a fungus (1).
(b) Mushroom (1)
(c) In yogurt (1)

Object	Living or Non-living?	Reason
Cloud
Tree
Ball
Yeast
(a) Fill in the table. (4 marks: 1 mark each)
(b) Explain why yeast is classified as you did. (1 mark)