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Primary 4 Science Diversity Quiz
Free P4 Science Diversity quiz, Ox Exam version, with questions, answers, and syllabus-aligned practice for Singapore students.
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Answers
Primary 4 Science Quiz - Diversity — Answer Key
Total Marks: 33
Answer 1.
C) Moss Moss is a plant — it grows, needs air, water and sunlight, and responds to its surroundings. A rock, chair and bottle do not carry out life processes. Marking: 1 mark for the correct option.
Answer 2.
B) It grows and needs food and water Growth and the need for food and water are life processes shown by living things. Options A, C and D describe non-living things. Marking: 1 mark.
Answer 3.
B) fungus Mushrooms cannot make their own food and reproduce by spores, so they are fungi, not plants or animals. Marking: 1 mark.
Answer 4.
B) Dolphin Dolphins give birth to live young, feed their young milk and breathe with lungs — features of mammals. Marking: 1 mark.
Answer 5.
C) Birds Birds have feathers, beaks and most can fly. Marking: 1 mark.
Answer 6.
B) Fern Ferns are non-flowering plants that reproduce by spores. Hibiscus, sunflower and orchid all produce flowers. Marking: 1 mark.
Answer 7.
C) It is flexible Flexibility lets rubber stretch and return to its original shape. Marking: 1 mark.
Answer 8.
B) It is transparent Transparent materials allow light to pass through so we can see through them. Marking: 1 mark.
Answer 9.
B) Plastic Plastic is waterproof, so it keeps the user dry. Paper and tissue absorb water; a sponge soaks up water. Marking: 1 mark.
Answer 10.
A) Metal Metal is strong and hard, so a metal key will not bend or break easily during use. Marking: 1 mark.
Answer 11.
Any two differences (1 mark each):
- Living things grow; non-living things do not grow.
- Living things need food, water and air; non-living things do not.
- Living things can reproduce; non-living things cannot.
- Living things respond to changes around them; non-living things do not.
- Living things eventually die; non-living things do not.
Answer 12.
- (a) Moss — plant
- (b) Mould — fungus
- (c) Guppy — animal
- (d) Bacteria — bacterium (bacteria group)
Marking: 2 marks if all four are correct; 1 mark if two or three are correct.
Answer 13.
- Snake — Reptiles (dry, scaly skin; eggs laid on land)
- Goldfish — Fish (scales, fins, gills; lives in water)
- Butterfly — Insects (six legs; wings)
Marking: 1 mark per correct group.
Answer 14.
The robot moves and makes sounds only because electricity from its batteries powers it. It does not grow, take in food, respire or reproduce, and it cannot respond to surroundings on its own. Therefore it is non-living. Marking: 1 mark for stating movement is powered/electric; 1 mark for stating it lacks life processes such as growth or reproduction.
Answer 15.
Any two similarities (1 mark each):
- Both have backbones (they are vertebrates).
- Both lay eggs.
- Both are animals.
- Both can move from place to place.
Answer 16.
- Plastic is waterproof, so rain does not soak through to the wearer. (1 mark)
- Paper absorbs water and becomes soft and tears easily when wet, so it is unsuitable. (1 mark)
(Accept: plastic is lightweight/flexible and dries quickly.)
Answer 17.
| Material | Hard | Flexible | Waterproof |
|---|---|---|---|
| Wood | ✓ | ✗ | ✗ |
| Glass | ✓ | ✗ | ✓ |
| Fabric | ✗ | ✓ | ✗ |
Marking: 1 mark per correctly completed row.
Answer 18.
Metal is a good conductor of heat, so a metal handle would become very hot and burn the user's hand. Plastic and wood are poor conductors of heat, so the handle stays cool enough to hold safely. Marking: 1 mark for identifying metal conducts heat well; 1 mark for stating plastic/wood are poor conductors and remain safe to hold.
Answer 19.
- Helpful: bacteria are used to make food such as yogurt and cheese, or to break down dead matter and waste. (1 mark)
- Harmful: some bacteria cause illnesses/diseases or spoil food. (1 mark)
Answer 20.
- (i) Plants (example: moss)
- (ii) Animals (example: guppy)
- (iii) Man-made non-living things (example: wooden chair)
Marking: 1 mark per correct label.
Teaching notes: Reinforce that classification depends on observable characteristics (life processes for living things; properties such as hardness, flexibility and waterproofness for materials). Common misconceptions to address: movement alone does not mean something is alive (see Q14), and mushrooms are not plants (see Q3).