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Science questions, unit 4
Nama / NameKelas / ClassTarikh / Date

Plants

35 marks. Use Practice to check each answer as you go, or Exam to answer everything first and then check.

Section A: objective questions

8 marks
Choose the best answer for each question.
1

Question 1

Which of these is a stimulus for plants?
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A
Plants respond to water, gravity, light and touch. Starch, oxygen and glucose are not stimuli.
For the teacher: Remembering, low difficulty, standard 4.1.1
Textbook p. 70
2

Question 2

Which part of a plant grows towards water?
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B
Roots respond to water and grow towards it.
For the teacher: Remembering, low difficulty, standard 4.1.2
Textbook p. 70
3

Question 3

A pupil touches a Mimosa pudica. What happens to its leaves?
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D
Leaves of Mimosa pudica respond to touch by drooping and folding inwards.
For the teacher: Understanding, low difficulty, standard 4.1.2
Textbook p. 71
4

Question 4

Diagram 1 shows a shoot before and after some days in the sunlight. Which stimulus makes the shoot bend like this?
A shoot in a pot bends towards the sun on the right
Diagram 1
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C
Shoots grow towards light, so the shoot bends towards the sun.
For the teacher: Understanding, low difficulty, standard 4.1.2
Textbook p. 74
5

Question 5

Which gas do plants take in for photosynthesis?
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B
Carbon dioxide from the air enters the leaves and is used in photosynthesis.
For the teacher: Remembering, low difficulty, standard 4.2.2
Textbook p. 77
6

Question 6

Which of these are the products of photosynthesis?
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A
Photosynthesis produces glucose (stored as starch) and oxygen.
For the teacher: Understanding, low difficulty, standard 4.2.3
Textbook p. 78
7

Question 7

A plant has red leaves. Can it carry out photosynthesis?
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B
Non-green plants can still carry out photosynthesis if they have chlorophyll.
For the teacher: Applying, medium difficulty, standard 4.2.2
Textbook p. 77
8

Question 8

Which is a reason why plants are important for the balance of gases in the air?
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D
Plants absorb carbon dioxide and release oxygen, which keeps the gases in the air balanced.
For the teacher: Applying, medium difficulty, standard 4.2.4
Textbook p. 81

Section B: structured questions

27 marks
Answer all questions. Write your answers in the spaces provided.
9

Question 9

Choose the correct answer.
[1 mark] (a)Roots respond to water and ______.
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gravity
[1 mark] (b)Shoots respond to ______.
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light
[1 mark] (c)Leaves of some plants respond to ______.
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touch
For the teacher: Remembering, low difficulty, standard 4.1.2
Textbook p. 85
10

Question 10

Hana sets up a petri dish with cotton on the left (A) and the right (B). Water is added to A only. Green bean seedlings are placed in the middle.
[1 mark] (a)In which direction will the roots grow?
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Tick each point you got.
[1 mark] (b)What is the conclusion?
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 4.1.3
Textbook p. 72
11

Question 11

Two chilli plants are placed in shoe boxes. Box A has a hole on the left side. Box B has a hole on the right side. Both boxes are placed in the sunlight for a week.
[1 mark] (a)In which direction does the shoot in box A grow?
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Tick each point you got.
[1 mark] (b)Give a reason for your answer.
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[1 mark] (c)State the conclusion of this investigation.
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For the teacher: Applying, medium difficulty, standard 4.1.3
Textbook p. 74
12

Question 12

Aiman touches the leaves, a flower and the stem of a Mimosa pudica.
[1 mark] (a)Which part responds to touch?
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Leaves
Only the leaves of Mimosa pudica droop and fold inwards when touched.
[1 mark] (b)Name another plant that responds to touch.
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 4.1.2
Textbook p. 75
13

Question 13

Name the four needs of photosynthesis.
[4 marks] (a)Write the four needs.
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For the teacher: Remembering, low difficulty, standard 4.2.2
Textbook p. 77
14

Question 14

Diagram 2 shows a plant carrying out photosynthesis.
A tomato plant showing the food made and the gas released through the leaves
Diagram 2
[1 mark] (a)What is photosynthesis?
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Tick each point you got.
[1 mark] (b)Name the gas released into the air.
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[1 mark] (c)In what form is glucose stored in the plant?
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Starch
Glucose is combined to form starch, which is stored in the plant.
For the teacher: Understanding, low difficulty, standard 4.2.3
Textbook p. 78
15

Question 15

Diagram 3 shows plants M and N. Both are given the same amount of water. M is in the sunlight. N is covered by a black box.
Plant M in the sunlight and plant N inside a black box, both in pots
Diagram 3
[1 mark] (a)What need for photosynthesis is different between M and N?
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Tick each point you got.
[2 marks] (b)Predict the condition of plant N after three days. Give a reason.
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[1 mark] (c)Plant M is not given water for five days. Predict its condition.
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Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 4.2.2
Textbook p. 86
16

Question 16

A village wants to cut down all the trees near the padi field to make a car park.
[2 marks] (a)Give two reasons why the trees are important to living things.
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[2 marks] (b)Write the word equation for photosynthesis.
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For the teacher: Evaluating, high difficulty, standard 4.2.4
Textbook p. 81
17

Question 17

Ali wants a houseplant to grow straight, but it keeps leaning towards the window.
[1 mark] (a)Which stimulus makes the plant lean?
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Light
Shoots grow towards light.
[1 mark] (b)Suggest what Ali can do so the plant grows straight.
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Tick each point you got.
For the teacher: Creating, medium difficulty, standard 4.1.2
Textbook p. 71