Plants

27 Grade 4 Integrated Science questions on Plants, with worked marking schemes. 27 questions are available on this topic in full.

1. Question 1

   1 mark

   Which part of a plant is brightly coloured and often has a sweet smell to attract insects such as bees?

   A. Stem

   B. Flower

   C. Bark

   D. Root

   (1 mark)

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2. Question 2

   1 mark

   Water absorbed by the roots is carried upwards to the leaves through which part of the plant?

   A. Root hair

   B. Stem

   C. Fruit

   D. Petal

   (1 mark)

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3. Question 3

   5 marks

   Learners want to find out whether leaves need light to stay healthy. They place one potted plant in a sunny place and an identical potted plant inside a dark cupboard for two weeks, watering both.

   (a) What are they trying to find out?

   (b) Predict what will happen to the plant kept in the dark.

   (c) Give a reason for your prediction.

   (5 marks)

   Marking scheme

   (a) Whether leaves/plants need light (sunlight) to stay healthy/make food - 1 mark. (b) The plant in the dark will become weak, its leaves will turn pale/yellow and it may wither/die - 2 marks. (c) Because without light the leaves cannot make (enough) food for the plant - 2 marks.

4. Question 4

   1 mark

   The stem of a plant helps to

   A. produce seeds

   B. transport water and support the plant

   C. absorb water

   D. attract insects

   (1 mark)

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5. Question 5

   1 mark

   Which of the following is a characteristic of plants as living things?

   A. They talk

   B. They run

   C. They grow

   D. They fly

   (1 mark)

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6. Question 6

   1 mark

   A pupil in Machakos uproots a young bean plant from the garden and notices thread-like structures covered in soil at the bottom. Which part of the plant holds it firmly in the soil and takes in water?

   A. Leaves

   B. Stem

   C. Flower

   D. Roots

   (1 mark)

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7. Question 7

   1 mark

   Which of the following best explains why leaves are usually green?

   A. They reflect the colour of the sky

   B. They are always wet with water

   C. They are covered with green soil

   D. They contain a green colouring that helps make food

   (1 mark)

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8. Question 8

   1 mark

   A plant that has wilted needs

   A. wind

   B. darkness

   C. water

   D. more soil

   (1 mark)

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9. Question 9

   1 mark

   The part of a plant that absorbs water and nutrients from the soil is the

   A. flower

   B. leaf

   C. stem

   D. root

   (1 mark)

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10. Question 10

    4 marks

    Plants can be grouped into flowering and non-flowering plants.

    (a) Give one difference between flowering and non-flowering plants.

    (b) Give one example of a flowering plant and one example of a non-flowering plant.

    (4 marks)

    Marking scheme

    (a) Flowering plants produce/bear flowers while non-flowering plants do not produce flowers - 2 marks. (b) Flowering example: any of mango, bean, maize, hibiscus, rose - 1 mark. Non-flowering example: any of fern, moss, algae - 1 mark.

11. Question 11

    1 mark

    A pupil places a potted plant near a window for two weeks. The leaves and stem bend towards the window. This shows that plants respond to:

    A. Light

    B. Sound

    C. Wind only

    D. Soil colour

    (1 mark)

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12. Question 12

    1 mark

    After a mango tree is pollinated, which part develops into the fruit that carries seeds?

    A. Stem

    B. Flower

    C. Leaf

    D. Root

    (1 mark)

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13. Question 13

    4 marks

    A pupil collects the following plants during a science lesson: mango, fern, hibiscus and moss. Group them into flowering plants and non-flowering plants.

    (4 marks)

    Marking scheme

    Flowering plants: mango and hibiscus - 2 marks (1 each). Non-flowering plants: fern and moss - 2 marks (1 each).

14. Question 14

    1 mark

    Which of the following is NOT a function of roots?

    A. Anchoring the plant

    B. Absorbing water

    C. Making food

    D. Storing food

    (1 mark)

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15. Question 15

    1 mark

    Plants need sunlight, water, and carbon dioxide to make

    A. roots

    B. food

    C. flowers

    D. seeds

    (1 mark)

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16. Question 16

    1 mark

    Which part of a plant develops into a fruit?

    A. Leaf

    B. Root

    C. Stem

    D. Flower

    (1 mark)

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17. Question 17

    1 mark

    A farmer says a certain crop is useful because we eat its underground part. Which of these plants is grown mainly for its edible root or underground part?

    A. Cassava

    B. Sunflower

    C. Napier grass

    D. Fern

    (1 mark)

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18. Question 18

    1 mark

    Which one of the following is a flowering plant?

    A. Bean plant

    B. Fern

    C. Moss

    D. Algae

    (1 mark)

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19. Question 19

    4 marks

    A gardener in Nyeri notices that a plant whose roots were damaged when weeding starts to wilt (dry up) even when there is water in the soil.

    (a) Explain why the plant wilts.

    (b) State why healthy roots are important to a plant.

    (4 marks)

    Marking scheme

    (a) The damaged roots cannot absorb/take in enough water from the soil, so the plant lacks water and begins to wilt/dry up - 2 marks. (b) Healthy roots hold/anchor the plant firmly AND absorb water and mineral salts needed by the plant - 2 marks (1 mark each function).

20. Question 20

    1 mark

    Leaves are important to a plant because they

    A. produce seeds

    B. make food for the plant

    C. support the plant

    D. absorb water from soil

    (1 mark)

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21. Question 21

    1 mark

    During a nature walk, learners observe that the green, flat parts of a plant face the sun. Which part of a plant traps sunlight to make food?

    A. Fruit

    B. Roots

    C. Leaves

    D. Stem

    (1 mark)

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22. Question 22

    1 mark

    Which of the following is a non-flowering plant?

    A. Rose

    B. Fern

    C. Maize

    D. Hibiscus

    (1 mark)

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23. Question 23

    3 marks

    Study the parts of a plant.

    (a) Name the part of a plant that makes food for the plant.

    (b) State the work of the roots.

    (c) State the work of the stem.

    (3 marks)

    Marking scheme

    (a) Leaves - 1 mark. (b) Roots hold/anchor the plant firmly in the soil and absorb (take in) water and mineral salts - 1 mark. (c) The stem holds up the plant and carries/transports water and food to other parts of the plant - 1 mark.

24. Question 24

    1 mark

    Which set below shows only parts of a plant found ABOVE the ground?

    A. Roots, stem, leaves

    B. Stem, leaves, flower

    C. Roots, fruit, stem

    D. Roots, root hairs, flower

    (1 mark)

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25. Question 25

    1 mark

    A learner groups plants by whether they bear flowers. Under which group should a maize plant be placed?

    A. Plants with no roots

    B. Flowering plants

    C. Water plants only

    D. Non-flowering plants

    (1 mark)

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26. Question 26

    3 marks

    Plants are useful to people in many ways. State THREE uses of plants to human beings.

    (3 marks)

    Marking scheme

    Any three, 1 mark each: source of food (fruits, vegetables, grains); source of medicine (herbs); provide timber/wood for building and furniture; give shade; provide firewood/fuel; used for decoration/beauty; give us clean air/oxygen; source of income when sold. (Max 3 marks)

27. Question 27

    3 marks

    Name the part of a flowering plant described in each case:

    (a) The part that produces seeds.

    (b) The part that is usually brightly coloured and attracts insects.

    (c) The part that grows underground and takes in water.

    (3 marks)

    Marking scheme

    (a) Flower (accept fruit for holding/containing seeds) - 1 mark. (b) Flower/petals - 1 mark. (c) Roots - 1 mark.

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