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Primary 3 Science Diversity Quiz
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Questions
Primary 3 Science Quiz - Diversity
Name: ___________________________
Class: Primary 3 _______
Date: ___________________________
Score: _______ / 30
Duration: 45 minutes
Total Marks: 30
Instructions:
- Answer all questions.
- Write your answers in the spaces provided.
- For multiple-choice questions, write the letter (A, B, C, or D) in the brackets provided.
- For open-ended questions, write your answers clearly in complete sentences.
- Check your work carefully before handing in.
Section A: Multiple-Choice Questions (10 × 1 mark = 10 marks)
For each question, choose the correct answer and write its letter in the brackets provided.
1. Which of the following is a living thing?
A. Cloud
B. Mushroom
C. River
D. Rock
[ ]
2. A student observed a plant for two weeks. Which observation shows that the plant is a living thing?
A. The plant changed colour when painted.
B. The plant grew taller and produced new leaves.
C. The plant fell over when the wind blew.
D. The plant became wet when it rained.
[ ]
3. Which of the following groups contains only non-living things?
A. Bacteria, yeast, mould
B. Water, air, sunlight
C. Fish, frog, bird
D. Tree, grass, flower
[ ]
4. Four pupils made statements about living things.
Ali: Living things need air, water, and food.
Bala: Living things can move from place to place.
Cindy: Living things can reproduce.
Devi: Living things respond to changes around them.
Which pupil made an incorrect statement?
A. Ali
B. Bala
C. Cindy
D. Devi
[ ]
5. Look at the classification table below.
| Group X | Group Y |
|---|---|
| Rose plant | Butterfly |
| Mango tree | Grasshopper |
| Fern | Beetle |
What are the headings for Group X and Group Y?
A. Group X: Flowering plants; Group Y: Insects
B. Group X: Non-flowering plants; Group Y: Insects
C. Group X: Plants; Group Y: Animals
D. Group X: Flowering plants; Group Y: Non-flowering plants
[ ]
6. Which of the following is not a characteristic of living things?
A. They grow.
B. They reproduce.
C. They need air, water, and food.
D. They are made of metal.
[ ]
7. A mushroom is classified as a fungus. Which statement about fungi is correct?
A. Fungi make their own food.
B. Fungi reproduce by spores.
C. Fungi are plants.
D. Fungi need sunlight to grow.
[ ]
8. Study the flowchart below.
Start
|
v
Does it need air, water, and food? ---No---> Non-living thing
|
Yes
|
v
Can it make its own food? ---Yes---> Plant
|
No
|
v
Animal
Which organism would follow the path: Yes → No?
A. Rose plant
B. Mould
C. Cat
D. Bacteria
[ ]
9. Which of the following animals is not an insect?
A. Ant
B. Spider
C. Butterfly
D. Grasshopper
[ ]
10. Pupils found an unknown organism in the school garden. It has green leaves, produces flowers, and makes its own food. Which group does it belong to?
A. Fungi
B. Bacteria
C. Flowering plants
D. Non-flowering plants
[ ]
Section B: Structured Questions (5 × 2 marks = 10 marks)
Answer the following questions in the spaces provided.
11. The table below shows four things found in a park.
| Thing | Living or Non-living? | Reason |
|---|---|---|
| (a) Angsana tree | _______________ | _________________________________________ |
| (b) Park bench | _______________ | _________________________________________ |
| (c) Monitor lizard | _______________ | _________________________________________ |
| (d) Puddle of water | _______________ | _________________________________________ |
12. Complete the table below by writing "Yes" or "No" for each characteristic.
| Characteristic | Bacteria | Mushroom | Rose Plant | Goldfish |
|---|---|---|---|---|
| Needs air, water, and food | ______ | ______ | ______ | ______ |
| Can reproduce | ______ | ______ | ______ | ______ |
| Can make its own food | ______ | ______ | ______ | ______ |
13. Jun Hao saw a Venus flytrap plant catching a fly. He said, "The Venus flytrap is an animal because it can move to catch food."
(a) Is Jun Hao correct? _______________
(b) Explain your answer. _________________________________________________________________________
14. The diagram below shows a flowchart for classifying living things.
<image_placeholder> id: Q14-fig1 type: diagram linked_question: Q14 description: Flowchart for classifying living things into major groups labels: Start, Living thing, Can it make its own food?, Yes, No, Plant, Animal, Does it have flowers?, Yes, No, Flowering plant, Non-flowering plant, Does it have 6 legs?, Yes, No, Insect, Other animal groups values: N/A must_show: Clear decision diamonds with yes/no branches, rectangular boxes for groups, arrows showing flow direction </image_placeholder>
(a) Write "Flowering plant", "Non-flowering plant", "Insect", or "Other animal groups" in the correct boxes (i) and (ii).
(i) __________________________
(ii) __________________________
(b) A pupil found an organism that makes its own food but does not have flowers. Which group does it belong to? __________________________
15. Classify the following organisms into the correct groups in the table below.
Organisms: Yeast, Moss, Guppy, Mould, Fern, Beetle
| Fungi | Non-flowering Plants | Flowering Plants | Animals |
|---|---|---|---|
| ___________ | ___________ | ___________ | ___________ |
| ___________ | ___________ | ___________ | ___________ |
Section C: Open-Ended Questions (2 × 5 marks = 10 marks)
Answer the following questions in complete sentences.
16. Scientists discovered a new organism in a Singapore nature reserve. They observed the following:
- It is green in colour.
- It grows on tree bark.
- It does not have flowers.
- It reproduces by spores.
- It cannot make its own food.
(a) Based on the observations, state whether this organism is a living thing or a non-living thing. __________________________
(b) Give two reasons for your answer in (a).
Reason 1: _________________________________________________________________________
Reason 2: _________________________________________________________________________
(c) Which group of living things does this organism most likely belong to? __________________________
(d) Explain your answer in (c). _________________________________________________________________________
17. A group of Primary 3 pupils conducted a study at the Singapore Botanic Gardens. They recorded their observations in the table below.
| Observation Number | What they saw | Living or Non-living? | Characteristic shown (if living) |
|---|---|---|---|
| 1 | Angsana tree with yellow flowers | ||
| 2 | Wooden bench | ||
| 3 | Butterfly resting on a leaf | ||
| 4 | Mushroom growing on a fallen log | ||
| 5 | Water in Swan Lake |
(a) Complete the table above by filling in the missing information.
(b) The pupils saw a monitor lizard swimming in the lake. State two characteristics of living things that the monitor lizard shows.
Characteristic 1: _________________________________________________________________________
Characteristic 2: _________________________________________________________________________
(c) One pupil said, "The wooden bench was once part of a living tree, so it is a living thing." Do you agree? Explain your answer. _________________________________________________________________________
18. The diagram below shows a classification chart for living things.
<image_placeholder> id: Q18-fig1 type: diagram linked_question: Q18 description: Classification chart with Living Things branching into Plants and Animals; Plants branch into Flowering and Non-flowering; Animals branch into Insects and Other Animals labels: Living Things, Plants, Animals, Flowering Plants, Non-flowering Plants, Insects, Other Animals values: N/A must_show: Clear hierarchical tree structure with branches and labels </image_placeholder>
(a) Using the classification chart above, state the group that each of the following organisms belongs to:
(i) Hibiscus plant: __________________________
(ii) Millipede: __________________________
(iii) Bird's nest fern: __________________________
(iv) Earthworm: __________________________
(b) State one similarity and one difference between flowering plants and non-flowering plants.
Similarity: _________________________________________________________________________
Difference: _________________________________________________________________________
19. Study the table below which shows the characteristics of four organisms, A, B, C, and D. A tick (✓) means the organism has that characteristic.
| Characteristic | Organism A | Organism B | Organism C | Organism D |
|---|---|---|---|---|
| Needs air, water, and food | ✓ | ✓ | ✓ | ✓ |
| Can reproduce | ✓ | ✓ | ✓ | ✓ |
| Can make its own food | ✓ | ✗ | ✗ | ✗ |
| Has flowers | ✓ | ✗ | ✗ | ✗ |
| Has 6 legs | ✗ | ✗ | ✓ | ✗ |
(a) Which organism(s) is/are plant(s)? __________________________
(b) Which organism is a flowering plant? __________________________
(c) Which organism is an insect? __________________________
(d) Organism B cannot make its own food and reproduces by spores. Which group does it most likely belong to? __________________________
20. Mei Ling wants to find out if a sealed glass jar containing a small plant, some water, and soil can survive without opening the lid for a month.
(a) State one characteristic of living things that the plant shows if it survives the month. _________________________________________________________________________
(b) The plant needs air to survive. Explain how the plant gets air inside the sealed jar. _________________________________________________________________________
(c) After a month, Mei Ling observes that the plant has grown taller. What does this show about the plant? _________________________________________________________________________
End of Quiz
Answers
Primary 3 Science Quiz - Diversity (Answer Key)
Total Marks: 30
Section A: Multiple-Choice Questions (10 × 1 mark = 10 marks)
1. B
Explanation: A mushroom is a fungus, which is a living thing. Clouds, rivers, and rocks are non-living things.
2. B
Explanation: Growing taller and producing new leaves shows growth, which is a characteristic of living things. The other options show responses to external forces (wind, rain) or physical changes (paint), not characteristics of life.
3. B
Explanation: Water, air, and sunlight are all non-living things. Group A contains fungi (living), Group C contains animals (living), Group D contains plants (living).
4. B
Explanation: Bala's statement is incorrect. Not all living things can move from place to place (e.g., plants are living but cannot move from place to place). The other statements are correct characteristics of living things.
5. C
Explanation: Group X contains rose plant, mango tree (both flowering plants) and fern (non-flowering plant). Group Y contains butterfly, grasshopper, beetle (all insects, which are animals). The only heading that correctly includes all items in each group is "Plants" for Group X and "Animals" for Group Y.
6. D
Explanation: Living things are made of cells, not metal. Options A, B, and C are all characteristics of living things.
7. B
Explanation: Fungi (including mushrooms) reproduce by spores. They do not make their own food (they are decomposers), they are not plants, and they do not need sunlight to grow.
8. C
Explanation: Following the flowchart: "Does it need air, water, and food?" → Yes (living thing). "Can it make its own food?" → No (not a plant). This leads to "Animal". A cat is an animal. Rose plant makes its own food (Yes→Plant). Mould and bacteria cannot make their own food but are not animals (they are fungi and bacteria respectively).
9. B
Explanation: A spider is an arachnid (8 legs), not an insect (6 legs). Ant, butterfly, and grasshopper are insects.
10. C
Explanation: The organism has green leaves, produces flowers, and makes its own food — these are characteristics of flowering plants.
Section B: Structured Questions (5 × 2 marks = 10 marks)
11. (2 marks total, 0.5 marks per cell)
| Thing | Living or Non-living? | Reason |
|---|---|---|
| (a) Angsana tree | Living | It can grow / It can reproduce / It needs air, water, and food / It responds to changes |
| (b) Park bench | Non-living | It cannot grow / It cannot reproduce / It does not need air, water, or food / It cannot respond to changes |
| (c) Monitor lizard | Living | It can grow / It can reproduce / It needs air, water, and food / It responds to changes / It can move by itself |
| (d) Puddle of water | Non-living | It cannot grow / It cannot reproduce / It does not need air, water, or food / It cannot respond to changes |
Marking notes: Accept any one valid characteristic for living things; accept any one valid reason for non-living things. Reasons must match the classification.
12. (2 marks total, 1/6 mark per cell ≈ 0.33, but typically marked as 2 marks for fully correct table)
| Characteristic | Bacteria | Mushroom | Rose Plant | Goldfish |
|---|---|---|---|---|
| Needs air, water, and food | Yes | Yes | Yes | Yes |
| Can reproduce | Yes | Yes | Yes | Yes |
| Can make its own food | No | No | Yes | No |
Explanation: All living things need air, water, and food and can reproduce. Only plants (rose plant) can make their own food through photosynthesis. Bacteria, mushrooms (fungi), and goldfish (animals) cannot make their own food.
13. (2 marks)
(a) No
(b) The Venus flytrap is a plant, not an animal. Although it can move its leaves to trap insects, it makes its own food through photosynthesis (it has green leaves with chlorophyll). It only traps insects to obtain nutrients (like nitrogen) that are lacking in its soil. Animals cannot make their own food.
Marking breakdown: 1 mark for "No", 1 mark for correct explanation mentioning it is a plant that makes its own food.
14. (2 marks)
(a) (i) Flowering plant
(ii) Non-flowering plant
Explanation: The flowchart shows: Living thing → Can it make its own food? Yes → Plant → Does it have flowers? Yes → (i) Flowering plant. No → (ii) Non-flowering plant. For animals: No → Animal → Does it have 6 legs? Yes → Insect. No → Other animal groups. The question asks for boxes (i) and (ii) which are the plant branches.
(b) Non-flowering plant
Explanation: The organism makes its own food (so it is a plant) but does not have flowers, so it is a non-flowering plant (e.g., fern, moss).
15. (2 marks, 0.25 marks per correct placement = 2 marks for 8 correct placements)
| Fungi | Non-flowering Plants | Flowering Plants | Animals |
|---|---|---|---|
| Yeast | Moss | (none given) | Guppy |
| Mould | Fern | (none given) | Beetle |
Explanation:
- Fungi: Yeast, Mould (reproduce by spores, cannot make own food)
- Non-flowering plants: Moss, Fern (make own food, no flowers, reproduce by spores)
- Flowering plants: None in the list
- Animals: Guppy (fish), Beetle (insect)
Marking note: If pupils leave "Flowering Plants" empty, that is correct. Deduct marks only for wrong placements.
Section C: Open-Ended Questions (5 × 2 marks = 10 marks)
16. (5 marks)
(a) Living thing (1 mark)
(b) Reason 1: It grows (on tree bark). / It reproduces by spores. (1 mark)
Reason 2: It responds to changes (implied by growth/reproduction). / It needs air, water, and food (implied by being a decomposer on bark). (1 mark)
Accept any two valid characteristics of living things shown in the observations.
(c) Fungi (1 mark)
(d) The organism cannot make its own food (so it is not a plant), reproduces by spores (characteristic of fungi), and grows on tree bark (typical habitat for fungi like mould or bracket fungi). Bacteria are microscopic and not typically seen growing visibly on bark. (1 mark)
Marking breakdown: 1 mark each for (a), (b) Reason 1, (b) Reason 2, (c), (d). Total 5 marks.
17. (5 marks)
(a) Completed table (2.5 marks, 0.5 marks per cell):
| Observation Number | What they saw | Living or Non-living? | Characteristic shown (if living) |
|---|---|---|---|
| 1 | Angsana tree with yellow flowers | Living | Can reproduce (flowers) / Can make own food / Can grow |
| 2 | Wooden bench | Non-living | (Not applicable / Does not grow, reproduce, need food, etc.) |
| 3 | Butterfly resting on a leaf | Living | Can move by itself / Responds to changes / Can reproduce |
| 4 | Mushroom growing on a fallen log | Living | Can grow / Can reproduce (by spores) |
| 5 | Water in Swan Lake | Non-living | (Not applicable / Does not grow, reproduce, need food, etc.) |
(b) Characteristic 1: It can move by itself (swimming). (1 mark)
Characteristic 2: It responds to changes / It needs air, water, and food / It can grow / It can reproduce. (1 mark)
Accept any two valid characteristics.
(c) No, I do not agree. (0.5 mark)
Explanation: The wooden bench is made from wood that was once part of a living tree, but the bench itself cannot grow, reproduce, respond to changes, or need air, water, and food. It is a non-living thing. (1.5 marks)
Marking breakdown: 2.5 marks for table, 2 marks for (b), 2 marks for (c). Total 5 marks.
18. (5 marks)
(a) (i) Flowering plant (1 mark)
(ii) Other animal groups (1 mark)
(iii) Non-flowering plant (1 mark)
(iv) Other animal groups (1 mark)
Explanation: Hibiscus has flowers → Flowering plant. Millipede has many legs (not 6) → Other animal groups. Bird's nest fern makes own food, no flowers → Non-flowering plant. Earthworm has no legs → Other animal groups.
(b) Similarity: Both can make their own food / Both are plants / Both need air, water, and food / Both can reproduce. (1 mark)
Difference: Flowering plants produce flowers (and fruits/seeds), while non-flowering plants do not have flowers (they reproduce by spores). (1 mark)
Marking breakdown: 4 marks for (a), 2 marks for (b). Total 5 marks.
19. (5 marks)
(a) Organism A and Organism B (1 mark)
Explanation: Plants can make their own food. Organism A (✓) and Organism B (✗) — wait, Organism B cannot make its own food. Correction: Only Organism A can make its own food (✓). Organism B, C, D cannot (✗). So only Organism A is a plant.
Correction: Organism A only (1 mark)
(b) Organism A (1 mark)
Explanation: It can make its own food (✓) and has flowers (✓).
(c) Organism C (1 mark)
Explanation: It has 6 legs (✓), which is a characteristic of insects.
(d) Fungi (1 mark)
Explanation: Organism B cannot make its own food and reproduces by spores. Fungi (like mould and yeast) are decomposers that cannot make their own food and reproduce by spores.
Marking breakdown: 1 mark each for (a), (b), (c), (d). Total 4 marks? Wait, the question is worth 5 marks. Let me adjust: (a) 1 mark, (b) 1 mark, (c) 1 mark, (d) 1 mark, and 1 mark for correct reasoning in (d) or overall. Actually, typical marking: (a) 1m, (b) 1m, (c) 1m, (d) 2m (1 for group, 1 for explanation). Total 5 marks.
20. (5 marks)
(a) It can grow / It can reproduce / It responds to changes / It needs air, water, and food (1 mark)
Accept any one valid characteristic shown by survival and growth.
(b) The plant gets air from the air trapped inside the sealed jar when it was closed. / The plant uses carbon dioxide in the air inside the jar for photosynthesis and releases oxygen. (1 mark)
Explanation: The jar was sealed with air inside. The plant uses the carbon dioxide in that air for photosynthesis.
(c) It shows that the plant can grow, which is a characteristic of living things. (1 mark)
Additional marks for detailed explanation: The plant grew taller because it carried out photosynthesis using light, water, and carbon dioxide in the jar, showing it is a living thing that can make its own food and grow. (2 marks for full explanation)
Marking breakdown: 1 mark for (a), 2 marks for (b), 2 marks for (c). Total 5 marks.
End of Answer Key