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Physics for IGCSE & O level - The Earth In Space (Section 12)

1
Which of the following is the smallest?
Answer
(D)
A planet
2
What is the name of the natural satellite of Earth?
Answer
(C)
Moon
3
Which planet has the highest surface temperature?
Answer
(B)
Venus
4
What is the name given to a group of stars, dust, and gas held together by gravity?
Answer
(B)
Galaxy
5
What is found in the Solar System?
Answer
A
B
C
6
Which term describes the force that causes objects to orbit one another?
Answer
(B)
Gravity
7
What happens to the core of a star at the end of its life?
Answer
(C)
It becomes a white dwarf.
8
What is the process that causes the expansion of the universe?
Answer
(B)
Dark energy
9
What is a light-year?
Answer
(B)
The distance light travels in a year
10
What does the Hubble constant help to determine?
Answer
(A)
The age of the Universe
11
Which of the following are the outer planets?
Answer
(D)
Neptune
12
What is a supernova?
Answer
(B)
An exploding star.
13
What is the distance light travels in a year called?
Answer
(C)
Light-year
14
Which of the following is the most massive type of star?
Answer
(D)
Supergiant
15
What are the main factors that cause seasons?
Answer
(B)
The tilt of Earth's axis and its orbit around the Sun
16
What is the source of energy released during nuclear fusion in the Sun?
Answer
(C)
Mass conversion
17
What is a major cause for the change of seasons?
Answer
(B)
The Earth's axial tilt
18
What does the Earth's rotation cause?
Answer
(B)
Day and night
19
Which planet is closest to the Sun?
Answer
(C)
Mercury
20
What is the name of the process that supplies the sun with its energy?
Answer
(C)
Nuclear fusion
21
What is the Earth's atmospheric composition primarily made of?
Answer
(C)
Nitrogen and oxygen
22
What are the components of a star's life cycle?
Answer
A
B
C
D
23
Which of the following are inner planets?
Answer
A
C
24
What are the two main elements that make up the Sun?
Answer
(C)
Hydrogen and helium
25
What is the name of the galaxy closest to ours?
Answer
(C)
Andromeda Galaxy
26
What term describes the expansion of the universe?
Answer
(C)
Expansion
27
What is a 'light year'?
Answer
(B)
The distance light travels in one year
28
What kind of a star is the sun?
Answer
(C)
A main sequence star
29
What is an example of a natural satellite?
Answer
(C)
The Moon
30
What causes the Earth to have seasons?
Answer
(B)
The tilt of Earth's axis
31
What are the main components of the Sun?
Answer
(B)
Helium and hydrogen
32
What is the name of our galaxy?
Answer
(B)
Milky Way
33
What does the inverse square law describe in relation to gravitation?
Answer
(C)
The gravitational force decreases with the square of the distance
34
Which of these are outer planets?
Answer
A
C
35
What is a natural satellite?
Answer
(C)
A moon
36
What causes the seasons on Earth?
Answer
(B)
The tilt of the Earth's axis of rotation
37
Which type of orbit do comets usually have?
Answer
(B)
Elliptical
38
What is the approximate age of the universe?
Answer
(C)
13.8 billion years
39
Which planet is known for its prominent ring system?
Answer
(B)
Saturn
40
What does the Earth's movement around the Sun create?
Answer
(B)
Seasons
41
How are galaxies described in relation to an expanding universe?
Answer
(A)
They are expanding away from each other.
42
What is formed when the core of the most massive stars collapse?
Answer
(D)
Neutron star or Black hole
43
In the Sun, what two elements combine to form Helium?
Answer
(C)
Two Hydrogen nuclei
44
Which is the hottest planet in our Solar System?
Answer
(B)
Venus
45
What is the significance of red shift in light from distant galaxies?
Answer
(B)
It indicates the galaxies are moving away from us.
46
What are the rings of Saturn primarily made of?
Answer
(B)
Ice and rock
47
What is a light-year?
Answer
(B)
The distance light travels in a year
48
How does the Sun's energy reach us?
Answer
(C)
Through radiation
49
What causes day and night?
Answer
(C)
The Earth rotating on its axis
50
Which of the following is a key idea discussed in the context of the Earth and the Universe?
Answer
(D)
All of the above