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Science questions, unit 9
Nama / NameKelas / ClassTarikh / Date

Earth

34 marks. Use Practice to check each answer as you go, or Exam to answer everything first. Ask a grown-up to help you mark the written answers.

Section A: objective questions

10 marks
Choose the best answer for each question.
1

Question 1

Diagram 1 shows children tossing a ball up. What pulls the ball back to the ground?
Children playing in a park with a disc, a ball and a hoop
Diagram 1
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B
Gravitational pull of Earth pulls all objects towards the centre of Earth.
For the teacher: Remembering, low difficulty, standard 9.1.1
Textbook p. 156
2

Question 2

Gravitational pull on Earth pulls objects towards the
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C
Objects are pulled towards the centre of Earth.
For the teacher: Remembering, low difficulty, standard 9.1.1
Textbook p. 156
3

Question 3

What would happen to the objects in a room if Earth had no gravitational pull?
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B
Without gravitational pull, objects would float in the air.
For the teacher: Understanding, low difficulty, standard 9.1.3
Textbook p. 159
4

Question 4

What are the two movements of Earth?
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A
Earth rotates on its axis and revolves around the Sun.
For the teacher: Remembering, low difficulty, standard 9.2.1
Textbook p. 160
5

Question 5

How long does Earth take to complete one rotation on its axis?
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D
One rotation takes 24 hours, which is one day.
For the teacher: Remembering, low difficulty, standard 9.2.4
Textbook p. 162
6

Question 6

Earth revolves around the Sun once in
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D
One complete revolution takes one year, or 365¼ days.
For the teacher: Remembering, low difficulty, standard 9.2.4
Textbook p. 162
7

Question 7

Diagram 2 shows Earth rotating on its axis. In which direction does Earth rotate?
Earth rotating from west to east and moving anticlockwise around the Sun
Diagram 2
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C
Earth rotates from west to east, in an anticlockwise direction.
For the teacher: Understanding, medium difficulty, standard 9.2.2
Textbook p. 161
8

Question 8

Which is an effect of the rotation of Earth on its axis?
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B
Day and night happen because Earth rotates. The other effects are due to gravity or revolution.
For the teacher: Understanding, medium difficulty, standard 9.2.3
Textbook p. 163
9

Question 9

At which time of the day is the shadow of a flagpole the shortest?
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C
At noon the Sun is highest, so the shadow is shortest.
For the teacher: Applying, medium difficulty, standard 9.2.3
Textbook p. 163
10

Question 10

Farid says, "The Sun moves across the sky from the east to the west." Which statement explains why the Sun seems to move?
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A
The Sun seems to change position because Earth rotates on its axis.
For the teacher: Analysing, high difficulty, standard 9.2.3
Textbook p. 163

Section B: structured questions

24 marks
Answer all questions. Circle the answer or write it in the space.
11

Question 11

Aina sticks small paper models of objects on a globe with adhesive clay and turns the globe slowly.
A globe with paper models stuck on it
Diagram 3
[1 mark] (a)The models stay in position on the globe. What does the globe represent?
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Tick each point you got.
[1 mark] (b)What does this activity show about gravitational pull on Earth?
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 9.1.2
Textbook p. 158
12

Question 12

Hakim drops a bean bag from the top of a chair. He then tosses another bean bag upward.
[1 mark] (a)In which direction does the bean bag move when it is released, and when it falls back after being tossed up?
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Downward
[1 mark] (b)Name the force that makes the bean bag move in that direction.
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Tick each point you got.
[1 mark] (c)Towards which place is the bean bag pulled?
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 9.1.1
Textbook p. 157
13

Question 13

Read the sentences about gravitational pull on Earth.
[1 mark] (a)"Objects stay in their positions on Earth because of gravitational pull."
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True
[1 mark] (b)"If Earth had no gravitational pull, water in a glass would stay in the glass."
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False
Without gravitational pull, water would float out of the glass.
[1 mark] (c)Give one thing that would happen to people and objects if Earth had no gravitational pull.
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Any 1 points
Tick each point you got.
For the teacher: Applying, medium difficulty, standard 9.1.3
Textbook p. 159
14

Question 14

Answer the questions about the movements of Earth.
[1 mark] (a)The movement of Earth around the Sun is called ______.
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revolution
[1 mark] (b)The movement of Earth on its axis is called ______.
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rotation
[1 mark] (c)How long does one complete revolution take?
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Tick each point you got.
[1 mark] (d)What is the direction of the revolution of Earth around the Sun?
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Tick each point you got.
For the teacher: Remembering, low difficulty, standard 9.2.2
Textbook p. 162
15

Question 15

Diagram 4 shows Earth and four places, P, Q, R and S. The Sun shines from the left.
Earth with places P and Q on the side facing the Sun and R and S on the far side
Diagram 4
[1 mark] (a)Which two places are having day time?
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P and Q
P and Q face the Sun, so they have day time.
[1 mark] (b)Place R is having night time. Explain why.
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Tick each point you got.
[1 mark] (c)Earth keeps rotating. How long does Earth take to make one full turn, bringing place Q back to the same position?
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Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 9.2.3
Textbook p. 163
16

Question 16

Murni puts a pole upright in the sunlight and measures its shadow every two hours. Diagram 5 shows her results.
Bar chart of shadow length: 8 a.m. 14 cm, 10 a.m. 7 cm, 12 noon 3 cm, 2 p.m. 8 cm, 4 p.m. 15 cm
Diagram 5
[1 mark] (a)At what time is the shadow the shortest?
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Tick each point you got.
[1 mark] (b)What is the length of the shadow at 4 p.m.?
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Tick each point you got.
[1 mark] (c)How much longer is the shadow at 4 p.m. than at 12 noon?
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Tick each point you got.
[2 marks] (d)Why does the length of the shadow change during the day?
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Tick each point you got.
For the teacher: Applying, low difficulty, standard 9.2.3
Textbook p. 165
17

Question 17

Daniel says, "Earth moves around the Sun, so Earth must be rotating once every year."
[1 mark] (a)Is Daniel correct?
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No
[2 marks] (b)Explain what is wrong with Daniel's statement.
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Tick each point you got.
[1 mark] (c)Give one effect of the rotation of Earth on its axis.
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Tick each point you got.
For the teacher: Evaluating, high difficulty, standard 9.2.1
Textbook p. 160