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

Phases of the Moon and constellations

40 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

Why can we see the Moon at night?
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B
The Moon does not give out its own light. It reflects the light from the Sun.
For the teacher: Remembering, low difficulty, standard 9.1.1
Textbook p. 200
2

Question 2

Which pair shows the two movements of the Moon?
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D
The Moon rotates on its own axis and revolves around the Earth.
For the teacher: Remembering, low difficulty, standard 9.1.2
Textbook p. 201
3

Question 3

We always see the same surface of the Moon from the Earth. Why?
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A
Both movements take 27 days, so the same surface always faces the Earth. The Moon does rotate, and both movements are anticlockwise.
For the teacher: Understanding, medium difficulty, standard 9.1.2
Textbook p. 202
4

Question 4

Diagram 1 shows the Moon on one night. What is this phase called?
A dark Moon with a thin bright curved edge on the left
Diagram 1
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C
Only a small, thin part of the lit surface faces the Earth, so it is a crescent moon.
For the teacher: Remembering, low difficulty, standard 9.1.3
Textbook p. 204
5

Question 5

We cannot see the Moon at the new moon phase. Why?
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D
At the new moon the lit side faces away from the Earth and the dark side faces the Earth (textbook p. 204).
For the teacher: Understanding, low difficulty, standard 9.1.3
Textbook p. 204
6

Question 6

What phase of the Moon is seen on the 5th day of a lunar month?
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B
The 5th day is between the 3rd and the 6th day, when the crescent moon is seen.
For the teacher: Applying, low difficulty, standard 9.1.3
Textbook p. 206
7

Question 7

What is a constellation?
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A
A constellation is a group of stars which appears to form a certain pattern in the sky that can be seen at night.
For the teacher: Remembering, low difficulty, standard 9.2.1
Textbook p. 209
8

Question 8

A traveller in the southern hemisphere is lost at night. Which constellation can help to find the direction south?
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C
The Southern Cross always points to the south. The Big Dipper (part of the Great Bear) points to the north.
For the teacher: Applying, low difficulty, standard 9.2.2
Textbook p. 211
9

Question 9

Aina sees a half-moon on the 8th day of a lunar month. She looks at the Moon again 14 days later. What phase will she see?
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A
8 + 14 = 22nd day. The 21st to 24th days are the half-moon phase. A full moon is on days 14 to 16.
For the teacher: Analysing, medium difficulty, standard 9.1.3
Textbook p. 206
10

Question 10

Which statement correctly explains the phases of the Moon?
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C
The Moon does not give out its own light and its rotation time does not change. The phases happen because its position changes as it revolves around the Earth, so we see different parts of the part lit by the Sun.
For the teacher: Evaluating, high difficulty, standard 9.1.3
Textbook p. 204

Section B: structured questions

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

Question 11

Ana and Melia observe the Moon. Their teacher uses a mirror and a torch to show how the Moon shines.
[1 mark] (a)Does the Moon give out its own light?
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No
[1 mark] (b)In the activity, what does the torch represent?
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The Sun
The mirror represents the Moon and the light from the torch represents the light from the Sun.
[1 mark] (c)What does the Moon do to the light from the Sun?
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Tick each point you got.
For the teacher: Remembering, low difficulty, standard 9.1.1
Textbook p. 200
12

Question 12

Diagram 2 shows the Moon moving around the Earth. Are these statements true or false?
The Earth in the middle with an oval orbit and the Moon at three places on it; labels say the rotation period and the revolution period are both 27 and one third days
Diagram 2
[1 mark] (a)The Moon revolves around the Earth.
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True
[1 mark] (b)The Moon takes a longer time to rotate once than to revolve once.
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False
Both take 27 days.
[1 mark] (c)The Moon rotates and revolves in the same direction.
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True
Both are anticlockwise.
For the teacher: Understanding, low difficulty, standard 9.1.2
Textbook p. 202
13

Question 13

The Moon takes 27 days to rotate once on its axis.
[1 mark] (a)How long does the Moon take to revolve once around the Earth?
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27 days
[1 mark] (b)Which surface of the Moon faces the Earth all the time?
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The same surface
[1 mark] (c)Explain your answer to (b).
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Tick each point you got.
For the teacher: Understanding, low difficulty, standard 9.1.2
Textbook p. 202
14

Question 14

Diagram 3 shows the Moon at eight positions, P to W, as it revolves around the Earth. The side of the Moon facing the Sun is always lit.
The Sun on the left, the Earth in the middle and the Moon at eight positions around it. R is between the Earth and the Sun, S is on the far side of the Earth from the Sun, and P and V are the positions at the bottom and the top.
Diagram 3
[1 mark] (a)At which position is the new moon seen?
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R
At R the Moon is between the Earth and the Sun, so the dark side faces the Earth.
[1 mark] (b)At which position is the full moon seen?
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S
At S the Moon is on the opposite side of the Earth from the Sun, so the whole lit surface faces the Earth.
[1 mark] (c)What phase of the Moon is seen at P?
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P is a quarter of the way round the orbit, so half of the lit surface faces the Earth.
Tick each point you got.
For the teacher: Applying, medium difficulty, standard 9.1.3
Textbook p. 205
15

Question 15

Diagram 4 shows four phases of the Moon, W, X, Y and Z. They are not in order.
Four Moons: W is a large bright part with a thin dark edge on the left, X is a thin bright crescent on the right, Y is a full bright circle and Z is a bright right half
Diagram 4
[2 marks] (a)Arrange the phases in the order they are seen after the new moon.
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X, Z, W, Y
Crescent, half-moon, gibbous, then full moon: more of the lit surface is seen each night.
Tick each point you got.
[1 mark] (b)Name the phase of the Moon shown by W.
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Tick each point you got.
For the teacher: Applying, medium difficulty, standard 9.1.3
Textbook p. 204
16

Question 16

1 Muharam 1442H was on 20 August 2020. The new moon had fully appeared on that day.
[1 mark] (a)What phase of the Moon is seen on 9 Muharam?
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Half-moon
The 7th to 10th days are the half-moon phase.
[2 marks] (b)On which date in the Gregorian calendar was 15 Muharam? Show how you find it.
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3 September 2020
August has 31 days, so day 34 of August is 3 September.
Tick each point you got.
For the teacher: Applying, medium difficulty, standard 9.1.3
Textbook p. 206
17

Question 17

Hafiz uses a lamp and a polystyrene ball on a pencil to study the phases of the Moon, as in Diagram 5. He turns his body to the left to see each phase.
Photographs of a pupil holding a polystyrene ball in front of a lamp in a dark room and turning to the left
Diagram 5
[1 mark] (a)What does the lamp represent?
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The Sun
[1 mark] (b)At what angle of turning does Hafiz see the full moon?
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180°
At 180° the ball is directly opposite the lamp.
[1 mark] (c)Why must this activity be done in a dark room?
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Tick each point you got.
For the teacher: Applying, low difficulty, standard 9.1.4
Textbook p. 207
18

Question 18

Diagram 6 shows two constellations, X and Y.
Two groups of stars joined by lines. X has seven stars like a scoop. Y has four stars in a cross shape.
Diagram 6
[1 mark] (a)Name constellation X.
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Big Dipper
The Big Dipper has seven stars that look like a water dipper or scoop.
[1 mark] (b)Name constellation Y.
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Southern Cross
The Southern Cross is the smallest constellation. It has four stars joined in a cross shape, which the textbook compares with a kite.
[1 mark] (c)In which hemisphere is constellation Y seen?
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Southern hemisphere
For the teacher: Understanding, low difficulty, standard 9.2.1
Textbook p. 210
19

Question 19

Long ago, before calendars were invented, farmers in the northern hemisphere used constellations to plan their work.
[1 mark] (a)Which constellation told farmers that it was time to start planting?
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Big Dipper
[1 mark] (b)What did the appearance of the Scorpion constellation tell farmers?
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Tick each point you got.
[1 mark] (c)Name one other use of constellations.
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Tick each point you got.
For the teacher: Applying, low difficulty, standard 9.2.2
Textbook p. 212
20

Question 20

A radio announcer says: "In two weeks, Malaysians will celebrate Hari Raya Aidilfitri." Hari Raya Aidilfitri is on 1 Syawal.
[1 mark] (a)What phase of the Moon is seen on 1 Syawal?
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New moon
The first day of each lunar month is when the new moon has appeared.
[2 marks] (b)What phase of the Moon was seen when the announcement was made? Explain your answer.
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Full moon. The full moon appears in the middle of the lunar month, about two weeks before 1 Syawal.
Tick each point you got.
For the teacher: Evaluating, high difficulty, standard 9.1.3
Textbook p. 216