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Science questions, unit 10
Nama / NameKelas / ClassTarikh / Date

Eclipse

44 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

When does an eclipse of the Moon occur?
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B
Earth blocks sunlight from the Moon, so Earth's shadow falls on the Moon.
For the teacher: Remembering, low difficulty, standard 10.1.1
Textbook p. 166
2

Question 2

An eclipse of the Moon can only occur during which phase of the Moon?
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C
Earth is between the Sun and the Moon only at full moon.
For the teacher: Remembering, low difficulty, standard 10.1.1
Textbook p. 166
3

Question 3

An eclipse of the Sun can only occur during which phase of the Moon?
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A
The Moon is between the Sun and Earth at new moon.
For the teacher: Remembering, low difficulty, standard 10.1.2
Textbook p. 168
4

Question 4

Why does an eclipse of the Moon not happen at every full moon?
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D
The Moon's orbit is tilted about 5 degrees from Earth's orbit.
For the teacher: Understanding, medium difficulty, standard 10.1.1
Textbook p. 167
5

Question 5

Diagram 1 shows the shadow of Earth and three positions of the Moon. What is seen when the Moon is at position C?
Earth's shadow with a dark umbra and a light penumbra; the Moon at A in the penumbra, B at the edge of the umbra and C inside the umbra
Diagram 1
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C
C is completely inside the umbra of Earth's shadow, so a total eclipse of the Moon is seen.
For the teacher: Applying, low difficulty, standard 10.1.3
Textbook p. 171
6

Question 6

Which is a safe way to watch an eclipse of the Sun?
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C
A pinhole camera makes an image on a card, so you never look at the Sun. Sunglasses and unfiltered telescopes still damage the eyes.
For the teacher: Understanding, low difficulty, standard 10.1.3
Textbook p. 173
7

Question 7

From which region on Earth can a total eclipse of the Sun be seen?
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A
Only inside the umbra does the Moon block the whole Sun. In the penumbra only a partial eclipse is seen.
For the teacher: Understanding, low difficulty, standard 10.1.3
Textbook p. 172
8

Question 8

What happens to the temperature of the surroundings during a total eclipse of the Sun?
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B
Less sunlight reaches Earth, so the surroundings become darker and cooler.
For the teacher: Remembering, low difficulty, standard 10.1.4
Textbook p. 174
9

Question 9

What colour does the Moon often look during a total eclipse of the Moon?
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D
Sunlight bends through Earth's atmosphere and reaches the Moon, giving it a reddish-brown colour.
For the teacher: Remembering, low difficulty, standard 10.1.3
Textbook p. 171
10

Question 10

Earth and the Moon form shadows because they are ______ objects.
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B
Light cannot pass through opaque objects, so a shadow forms behind them.
For the teacher: Understanding, medium difficulty, standard 10.1.3
Textbook p. 171

Section B: structured questions

34 marks
Answer all questions.
11

Question 11

Diagram 2 shows the Sun, Earth and the Moon in a straight line.
Sun, Earth and Moon in a straight line, with Earth's shadow on the Moon
Diagram 2
[1 mark] (a)What eclipse is shown?
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Eclipse of the Moon
[1 mark] (b)Which phase of the Moon is it?
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Full moon
[1 mark] (c)Why does a shadow form on the Moon?
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Any 1 points
Tick each point you got.
For the teacher: Understanding, low difficulty, standard 10.1.1
Textbook p. 166
12

Question 12

Diagram 3 shows three positions of the Moon in the shadow of Earth.
Earth's shadow with the Moon at positions A, B and C
Diagram 3
[1 mark] (a)What type of eclipse is seen when the Moon is at C?
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Total eclipse of the Moon
[1 mark] (b)What type of eclipse is seen when the Moon is at B, only part of it inside the umbra?
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Partial eclipse of the Moon
[1 mark] (c)At which position is the Moon only in the penumbra?
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Tick each point you got.
For the teacher: Applying, low difficulty, standard 10.1.3
Textbook p. 171
13

Question 13

Diagram 4 shows an eclipse of the Sun. P and Q are two places on Earth.
The Moon's shadow reaching Earth; regions A and B in the shadow; places P in the umbra and Q in the penumbra on Earth
Diagram 4
[2 marks] (a)Name shadow A and shadow B.
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Tick each point you got.
[1 mark] (b)What is seen at P?
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Tick each point you got.
[1 mark] (c)What is seen at Q?
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Tick each point you got.
[2 marks] (d)State two properties of sunlight that explain the shadows.
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Tick each point you got.
For the teacher: Analysing, medium difficulty, standard 10.1.3
Textbook p. 172
14

Question 14

Say whether each statement about eclipses is true or false.
[1 mark] (a)An eclipse of the Sun can be seen at night.
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False
It only occurs in the daytime.
[1 mark] (b)An eclipse of the Sun occurs at new moon.
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True
[1 mark] (c)In an eclipse of the Moon, the Moon is between the Sun and Earth.
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False
Earth is between the Sun and the Moon.
[1 mark] (d)It is safe to see an eclipse of the Moon with the naked eye.
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True
For the teacher: Understanding, low difficulty, standard 10.1.2
Textbook p. 168
15

Question 15

Diagram 5 shows the Moon's orbit and Earth's orbit, side view.
The Moon's orbit tilted from Earth's orbit, with the Moon above the shadow of Earth
Diagram 5
[1 mark] (a)About how many degrees is the Moon's orbit tilted from Earth's orbit?
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Tick each point you got.
[2 marks] (b)Explain why an eclipse does not happen at every new moon or full moon.
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Tick each point you got.
[1 mark] (c)About how many times a year can one kind of eclipse occur?
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Tick each point you got.
For the teacher: Analysing, high difficulty, standard 10.1.2
Textbook p. 169
16

Question 16

Aina says, "I will look at the eclipse of the Sun with my naked eyes, just for a second."
[1 mark] (a)Is Aina's plan safe?
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No
[1 mark] (b)Give a reason.
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Tick each point you got.
[2 marks] (c)State two safe ways to observe an eclipse of the Sun.
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Any 2 points
Tick each point you got.
For the teacher: Understanding, low difficulty, standard 10.1.3
Textbook p. 173
17

Question 17

Predict the conditions on Earth during these events.
[2 marks] (a)During a total eclipse of the Sun, what happens to the brightness and the temperature of the surroundings?
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Tick each point you got.
[1 mark] (b)Birds see the darkness during a total eclipse of the Sun. What do they do?
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Tick each point you got.
[1 mark] (c)What happens to the level of the sea tide during an eclipse of the Moon?
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Tick each point you got.
For the teacher: Applying, medium difficulty, standard 10.1.4
Textbook p. 174
18

Question 18

Pupils make an eclipse model with a torch, a ball of modelling clay and a pin on the edge of a plastic circle.
[1 mark] (a)What does the torch represent?
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Sun
[1 mark] (b)What does the ball of modelling clay represent?
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Earth
[1 mark] (c)What does the pin represent?
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Moon
For the teacher: Applying, low difficulty, standard 10.1.5
Textbook p. 170
19

Question 19

Plan how to use a torch, a ball and a white card in a dark room to show an eclipse of the Sun to your class.
[2 marks] (a)Where would you put the ball, the torch and the card?
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Tick each point you got.
[1 mark] (b)What will you see on the card?
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Tick each point you got.
For the teacher: Creating, medium difficulty, standard 10.1.5
Textbook p. 173