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Primary 4 Science Diversity Quiz

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Questions

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Primary 4 Science Quiz - Diversity

Name: ___________________________
Class: Primary 4 _______
Date: _______________
Score: _______ / 40

Duration: 45 minutes
Total Marks: 40

Instructions:

  1. Answer all questions.
  2. Write your answers in the spaces provided.
  3. For multiple-choice questions, write the letter (A, B, C, or D) in the bracket provided.
  4. For open-ended questions, write your answers clearly in complete sentences where appropriate.

Section A: Multiple-Choice Questions (10 × 1 mark = 10 marks)

For each question, choose the correct answer and write its letter (A, B, C, or D) in the bracket provided.

1. Which of the following is a living thing?
A. Cloud
B. Mushroom
C. River
D. Rock
[ ]

2. The diagram below shows a plant.
<image_placeholder> id: Q2-fig1 type: diagram linked_question: Q2 description: A simple flowering plant with roots, stem, leaves, and flowers clearly visible. No labels. labels: roots, stem, leaves, flowers values: none must_show: All four main plant parts distinctly drawn </image_placeholder>
Which part of the plant absorbs water and minerals from the soil?
A. Leaves
B. Stem
C. Roots
D. Flowers
[ ]

3. Which of the following groups contains only non-living things?
A. Bird, fish, ant
B. Table, chair, pencil
C. Grass, tree, flower
D. Cat, dog, rabbit
[ ]

4. Fungi and bacteria are similar because they both __________.
A. make their own food
B. reproduce by seeds
C. cannot be seen with the naked eye
D. break down dead organisms for food
[ ]

5. Which characteristic of living things is shown when a mimosa plant closes its leaves after being touched?
A. Living things grow.
B. Living things respond to changes.
C. Living things reproduce.
D. Living things need air, food, and water.
[ ]

6. The diagram below shows the life cycle of a butterfly.
<image_placeholder> id: Q6-fig1 type: diagram linked_question: Q6 description: Four-stage life cycle diagram of a butterfly arranged in a circle with arrows: Egg → Caterpillar (Larva) → Pupa (Chrysalis) → Adult Butterfly → back to Egg. Stages labelled A, B, C, D. labels: A: Egg, B: Caterpillar, C: Pupa, D: Adult Butterfly values: none must_show: Clear cyclic arrangement with arrows, distinct morphological differences between stages </image_placeholder>
At which stage does the butterfly lay eggs?
A. Stage A
B. Stage B
C. Stage C
D. Stage D
[ ]

7. Which of the following animals undergoes a three-stage life cycle (incomplete metamorphosis)?
A. Butterfly
B. Mosquito
C. Grasshopper
D. Beetle
[ ]

8. A student wants to group the following animals:
Bat, Penguin, Ostrich, Eagle
Which grouping is based on the animals' outer covering?
A. Bat | Penguin, Ostrich, Eagle
B. Bat, Penguin | Ostrich, Eagle
C. Bat, Ostrich | Penguin, Eagle
D. Penguin, Ostrich | Bat, Eagle
[ ]

9. The table below shows the characteristics of four organisms, W, X, Y, and Z. A tick (✓) means the organism has the characteristic.

CharacteristicWXYZ
Has feathers✓
Has hair✓
Lays eggs✓✓✓
Gives birth to young alive✓

Which organism is most likely a mammal?
A. W
B. X
C. Y
D. Z
[ ]

10. Which of the following statements about microorganisms is correct?
A. All microorganisms are harmful.
B. Microorganisms can only be seen with a microscope.
C. Microorganisms do not reproduce.
D. Yeast is not a microorganism.
[ ]

Section B: Short-Answer Questions (5 × 2 marks = 10 marks)

Write your answers in the spaces provided.

11. State two differences between a living thing and a non-living thing.

12. The diagram below shows a mushroom growing on a rotting log.
<image_placeholder> id: Q12-fig1 type: diagram linked_question: Q12 description: A mushroom with cap and stem growing on a decaying log. Log shows signs of decomposition. labels: mushroom cap, stem, rotting log values: none must_show: Mushroom clearly on log, log appears decayed </image_placeholder>
(a) Is the mushroom a plant? __________
(b) Explain your answer in (a).

13. The diagram below shows the life cycle of a frog.
<image_placeholder> id: Q13-fig1 type: diagram linked_question: Q13 description: Frog life cycle: Eggs (in water) → Tadpole (with gills, tail, no legs) → Tadpole with hind legs → Tadpole with four legs (tail shortening) → Young frog (tail almost gone) → Adult frog. Arrows show progression. labels: Eggs, Tadpole, Tadpole with hind legs, Tadpole with four legs, Young frog, Adult frog values: none must_show: Clear progression showing gradual development, aquatic to terrestrial transition </image_placeholder>
(a) Name the stage labelled X in the diagram (tadpole with four legs, tail shortening).

(b) State one difference between the young frog and the adult frog.

14. Study the classification chart below.
<image_placeholder> id: Q14-fig1 type: diagram linked_question: Q14 description: Classification chart: Living Things → Plants (Flowering, Non-flowering) and Animals (Mammals, Birds, Fish, Reptiles, Amphibians, Insects). Two blank boxes under "Plants" and "Animals" for examples. labels: Living Things, Plants, Animals, Flowering, Non-flowering, Mammals, Birds, Fish, Reptiles, Amphibians, Insects values: none must_show: Clear hierarchy with blank example boxes </image_placeholder>
(a) Write one example of a flowering plant in the box provided.

(b) Write one example of an amphibian in the box provided.

15. The table below shows the characteristics of three organisms, P, Q, and R.

CharacteristicPQR
Has wings✓✓
Has feathers✓
Lays eggs✓✓✓
Has six legs✓

(a) Which organism (P, Q, or R) is an insect? __________
(b) Give a reason for your answer in (a).

Section C: Structured / Open-Ended Questions (4 × 5 marks = 20 marks)

Write your answers in the spaces provided. Show your working or reasoning clearly.

16. Ali found an unknown organism in his garden. He observed the following:

  • It is green in colour.
  • It does not move from place to place.
  • It grows taller over time.
  • It produces seeds.

(a) Based on the observations, is the organism a living thing or a non-living thing?

(b) Give two reasons from the observations to support your answer in (a).

(c) Which group of living things does this organism most likely belong to?

(d) State one function of the seeds produced by this organism.

17. The diagram below shows the life cycles of a butterfly and a grasshopper.
<image_placeholder> id: Q17-fig1 type: diagram linked_question: Q17 description: Side-by-side comparison: Butterfly (Complete Metamorphosis): Egg → Larva (Caterpillar) → Pupa (Chrysalis) → Adult. Grasshopper (Incomplete Metamorphosis): Egg → Nymph (resembles small adult, no wings) → Adult (with wings). Arrows show direction. labels: Butterfly: Egg, Larva, Pupa, Adult; Grasshopper: Egg, Nymph, Adult values: none must_show: Clear visual distinction between 4-stage and 3-stage cycles, nymph resembles adult </image_placeholder>
(a) Name the type of metamorphosis shown by the butterfly.

(b) Name the type of metamorphosis shown by the grasshopper.

(c) State one similarity between the two life cycles.

(d) State two differences between the two life cycles.

(e) The young of the grasshopper is called a nymph. How does the nymph become an adult?

18. A group of students classified some animals into two groups as shown below.

Group A: Whale, Dolphin, Bat
Group B: Shark, Salmon, Goldfish

(a) Give a suitable heading for Group A and Group B.
Group A: ______________________________________________________________________
Group B: ______________________________________________________________________

(b) State one characteristic that the animals in Group A share.

(c) State one characteristic that the animals in Group B share.

(d) The whale lives in water like a fish. Explain why the whale is not a fish.

(e) The bat can fly like a bird. Explain why the bat is not a bird.

19. The diagram below shows a classification key for some animals.
<image_placeholder> id: Q19-fig1 type: diagram linked_question: Q19 description: Dichotomous key flowchart: Start → Does it have feathers? → Yes → Bird / No → Does it have hair/fur? → Yes → Mammal / No → Does it have scales and live in water? → Yes → Fish / No → Does it have moist skin and live both on land and in water? → Yes → Amphibian / No → Does it have dry scales and lay eggs on land? → Yes → Reptile / No → Insect (6 legs, 3 body parts). labels: Decision nodes with questions, terminal groups: Bird, Mammal, Fish, Amphibian, Reptile, Insect values: none must_show: Clear branching logic, all major vertebrate groups + insects covered </image_placeholder>
Use the key to identify the animal group for each description below.

(a) An animal that has feathers and lays eggs.

(b) An animal that has hair, gives birth to young alive, and feeds its young with milk.

(c) An animal that has moist skin, lays eggs in water, and its young live in water before living on land.

(d) An animal that has six legs and three body parts.

(e) An animal that has dry scales, lays eggs on land, and breathes with lungs.

20. Scientists discovered a new organism in a deep-sea environment. It has the following characteristics:

  • It is made of a single cell.
  • It does not have a nucleus.
  • It reproduces by dividing into two.
  • It obtains food by absorbing nutrients from its surroundings.

(a) Is this organism a plant, an animal, a fungus, or a bacterium?

(b) Give two reasons for your answer in (a).

(c) State one way in which this organism is useful to humans.

(d) State one way in which this organism can be harmful to humans.

(e) Why can this organism not be seen with the naked eye?

End of Quiz

Answers

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Primary 4 Science Quiz - Diversity (Answer Key)

Total Marks: 40

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. C
Explanation: Roots absorb water and minerals from the soil. The stem transports water and food, leaves make food, and flowers are for reproduction.

3. B
Explanation: Table, chair, and pencil are all man-made non-living things. The other groups contain living things (animals or plants).

4. D
Explanation: Fungi and bacteria are decomposers. They break down dead organisms and waste materials to obtain nutrients. They do not make their own food (A is incorrect), do not reproduce by seeds (B is incorrect), and some fungi (like mushrooms) can be seen with the naked eye (C is incorrect).

5. B
Explanation: The mimosa plant responding to touch by closing its leaves shows that living things respond to changes in their environment.

6. D
Explanation: The adult butterfly (Stage D) lays eggs to start the life cycle again.

7. C
Explanation: Grasshoppers undergo incomplete metamorphosis (three stages: egg → nymph → adult). Butterflies, mosquitoes, and beetles undergo complete metamorphosis (four stages: egg → larva → pupa → adult).

8. A
Explanation: Bats have hair/fur (mammals), while penguins, ostriches, and eagles have feathers (birds). This grouping is based on outer covering.

9. A
Explanation: Organism W has hair and gives birth to young alive — these are characteristics of mammals. Organism X has feathers and lays eggs (bird). Organisms Y and Z lay eggs but lack other defining features shown.

10. B
Explanation: Microorganisms are too small to be seen with the naked eye and require a microscope. Not all are harmful (some are useful, e.g., yeast in bread-making). They do reproduce (C is incorrect). Yeast is a fungus and a microorganism (D is incorrect).

Section B: Short-Answer Questions (5 × 2 marks = 10 marks)

11. (2 marks — 1 mark per valid difference)
Acceptable answers (any two):

  • Living things need air, food, and water; non-living things do not.
  • Living things grow; non-living things do not grow.
  • Living things respond to changes; non-living things do not respond.
  • Living things reproduce; non-living things do not reproduce.
  • Living things can move on their own (animals); non-living things cannot move on their own.
  • Living things die; non-living things do not die.

12. (a) No (1 mark)
(b) Mushrooms are fungi, not plants. They do not make their own food (no chlorophyll) and obtain food by decomposing dead matter. (1 mark)
Key concept: Fungi lack chlorophyll and are decomposers; plants are producers.

13. (a) Young frog or Froglet (1 mark)
Acceptable: "Young frog", "Froglet", "Tadpole with four legs (tail almost gone)"
(b) The young frog has a short tail (or tail almost gone) while the adult frog has no tail. (1 mark)
Other acceptable differences: Young frog is smaller; young frog may not be fully mature for reproduction.

14. (a) Any flowering plant (e.g., Hibiscus, Bougainvillea, Rose, Sunflower, Mango tree) (1 mark)
(b) Any amphibian (e.g., Frog, Toad, Salamander, Newt) (1 mark)

15. (a) P (1 mark)
(b) Insects have six legs and three body parts. Organism P has wings and six legs (implied by "has six legs" row), while Q has feathers (bird) and R has wings but no six legs shown. (1 mark)
More precise reasoning: Only P shows "Has six legs" with a tick. Insects are defined by having six legs and three body parts.

Section C: Structured / Open-Ended Questions (4 × 5 marks = 20 marks)

16. (a) Living thing (1 mark)
(b) Any two from:

  • It grows taller over time (living things grow).
  • It produces seeds (living things reproduce).
  • It is green (contains chlorophyll, can make food — characteristic of plants).
    (2 marks — 1 mark per reason)
    (c) Plants (or Flowering plants) (1 mark)
    (d) Seeds grow into new plants / for reproduction / to disperse and grow into new plants. (1 mark)

17. (a) Complete metamorphosis (1 mark)
(b) Incomplete metamorphosis (1 mark)
(c) Both life cycles start from an egg. (1 mark)
Other acceptable: Both have an adult stage; both involve growth and development.
(d) Any two from: (2 marks — 1 mark per difference)

  • Butterfly has 4 stages (egg, larva, pupa, adult); grasshopper has 3 stages (egg, nymph, adult).
  • Butterfly has a pupa stage; grasshopper does not have a pupa stage.
  • Butterfly young (larva/caterpillar) looks very different from adult; grasshopper young (nymph) resembles the adult but is smaller and wingless.
  • Butterfly undergoes complete metamorphosis; grasshopper undergoes incomplete metamorphosis.
    (e) The nymph moults (sheds its outer covering) several times as it grows, and develops wings to become an adult. (1 mark)
    Key concept: Incomplete metamorphosis involves moulting; nymphs gradually develop into adults.

18. (a) Group A: Mammals (1 mark)
Group B: Fish (1 mark)
(b) They breathe with lungs / have hair or fur / give birth to young alive / feed young with milk / are warm-blooded. (1 mark)
(c) They live in water / breathe with gills / have scales / lay eggs (mostly) / have fins / are cold-blooded. (1 mark)
(d) Whales are mammals: they breathe air with lungs (not gills), give birth to live young, feed young with milk, and have hair (though very little). Fish breathe with gills and lay eggs. (2 marks — 1 mark for identifying whale as mammal, 1 mark for correct contrasting characteristic)
(e) Bats are mammals: they have hair/fur (not feathers), give birth to live young, and feed young with milk. Birds have feathers, lay eggs, and do not produce milk. (2 marks — 1 mark for identifying bat as mammal, 1 mark for correct contrasting characteristic)

19. (a) Bird (1 mark)
(b) Mammal (1 mark)
(c) Amphibian (1 mark)
(d) Insect (1 mark)
(e) Reptile (1 mark)
Each answer follows the dichotomous key logic provided in the diagram.

20. (a) Bacterium (1 mark)
(b) Any two from: (2 marks — 1 mark per reason)

  • It is made of a single cell (unicellular).
  • It does not have a nucleus (prokaryotic).
  • It reproduces by dividing into two (binary fission).
  • It absorbs nutrients from surroundings (decomposer/absorptive nutrition).
    These are characteristics of bacteria (prokaryotes). Plants and animals are multicellular with nuclei (eukaryotes). Fungi are eukaryotes (have nuclei) and mostly multicellular (yeast is unicellular but has a nucleus).
    (c) Any one from: (1 mark)
  • Used in making yoghurt, cheese, antibiotics (e.g., penicillin).
  • Decompose waste / recycle nutrients in environment.
  • Help in digestion (gut bacteria).
  • Used in biotechnology / genetic engineering.
    (d) Any one from: (1 mark)
  • Cause diseases (e.g., food poisoning, tuberculosis, cholera).
  • Cause food spoilage / decay.
  • Cause infections.
    (e) It is microscopic / too small (single-celled) to be seen without a microscope. (1 mark)
    Key concept: Bacteria are unicellular prokaryotes, typically 1–5 micrometres in size.

Marking Notes for Teachers

  • Section A: Award 1 mark per correct option. No half marks.
  • Section B: Award marks as indicated. Accept scientifically accurate alternatives.
  • Section C:
    • Q16: Part (b) requires reasons from the observations given. Do not accept general characteristics not mentioned (e.g., "needs water" was not observed).
    • Q17: Part (d) differences must be comparative (mention both butterfly and grasshopper).
    • Q18: Parts (d) and (e) require explaining why the animal is not in the other group, not just stating its group.
    • Q19: Answers must match the key provided in the diagram.
    • Q20: Part (b) reasons must link to the given characteristics. Part (c) and (d) accept any valid use/harm.

Common Mistakes to Watch For:

  • Confusing fungi with plants (Q12).
  • Thinking nymph = larva (Q17).
  • Classifying whale/bat by habitat/ability instead of biological characteristics (Q18).
  • Not using the dichotomous key provided (Q19).
  • Confusing bacteria (prokaryotes) with yeast (fungi, eukaryotes) (Q20).