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Physics for IGCSE & O level - The Earth In Space (Section 11)

1
What happens to the star when it runs out of hydrogen?
Answer
(C)
It cools and becomes a red giant.
2
How is energy transported from the core of the sun?
Answer
(C)
By radiation and convection
3
What is the approximate diameter of the Sun?
Answer
(A)
1,000,000 km
4
What do scientists use to estimate the age of the Universe?
Answer
(D)
All of the above
5
What type of energy is released by nuclear reactions in the sun?
Answer
(C)
Nuclear
6
What causes the Earth to have seasons?
Answer
(C)
The tilt of Earth on its axis
7
What is the Earth's axis?
Answer
(A)
An imaginary line through the center of the Earth
8
Where does the sun produce most of its energy?
Answer
(B)
Core
9
Which of the following is a characteristic of a black hole?
Answer
(B)
The result of a supernova explosion
10
What is the shape of the Earth's orbit around the Sun?
Answer
(C)
Elliptical
11
Which of these objects are examples of satellites?
Answer
A
B
12
What causes the phases of the moon?
Answer
(C)
The sun's light reflecting off the Moon as it orbits Earth
13
What is the name of the force that initially causes a nebula to collapse?
Answer
(C)
Gravitational force
14
What happens to the core of a massive star during a supernova?
Answer
(B)
It collapses to form a neutron star or black hole
15
What is the name of the most massive stars?
Answer
(C)
Supergiants
16
How long does it take for the Moon to orbit Earth?
Answer
(A)
About 27 days
17
In the lifecycle of a star, what follows the main sequence?
Answer
(C)
Red giant
18
What causes the seasons on Earth?
Answer
(C)
The tilt of Earth's axis
19
Which element is the Sun using for nuclear fuel?
Answer
(B)
Hydrogen
20
Which of the following is an example of a natural satellite?
Answer
(B)
The Moon
21
What is the name of the largest planet in our solar system?
Answer
(B)
Jupiter
22
What causes the phases of the moon?
Answer
(C)
Changing angles of sunlight on the moon
23
What are meteors?
Answer
(C)
Small pieces of space debris burning up in Earth's atmosphere
24
The Earth is at its lowest average temperature in which month?
Answer
(B)
December
25
What is the period of the orbit of a satellite?
Answer
(A)
The time it takes to orbit the Earth.
26
What is the speed of light, in kilometers per second?
Answer
(A)
300,000 km/s
27
What is the distance of Earth from the Sun?
Answer
(B)
150 million km
28
What type of orbit do comets have?
Answer
(A)
Elliptical
29
Which planet is the brightest object in the night sky after the Moon?
Answer
(B)
Venus
30
Which planet has a large red spot?
Answer
(B)
Jupiter
31
What is the Earth's largest natural satellite?
Answer
(C)
The Moon
32
What is the approximate diameter of Earth?
Answer
(B)
12,000 km
33
What are the days and nights caused by?
Answer
(C)
The Earth spinning on its axis
34
What type of orbit do most satellites have?
Answer
(A)
Circular
35
What type of object is the Moon?
Answer
(C)
A natural satellite
36
What is the Earth's rotation period?
Answer
(A)
24 hours
37
What is the process by which a star fuses lighter elements into heavier ones?
Answer
(B)
Fusion
38
What element will remain in the core after a star runs out of hydrogen fuel?
Answer
(B)
Helium
39
What is the correct order of some planets outward from the sun?
Answer
(A)
Mercury, Venus, Earth, Mars, Jupiter
40
What is the force that keeps objects in orbit around each other?
Answer
(B)
Gravity
41
Which planet is closest to the Earth?
Answer
(B)
Venus
42
How do you measure the distance of a galaxy moving away from Earth?
Answer
(D)
Using the redshift
43
How many days does it take for the Earth to orbit the Sun?
Answer
(B)
365 days
44
What is the time it takes for Earth to make a full rotation?
Answer
(C)
24 hours
45
What is the name of our galaxy?
Answer
(B)
Milky Way
46
Which of the following planets is an inner planet?
Answer
(C)
Earth
47
What is the approximate distance from the Sun to Earth?
Answer
(B)
150 million km
48
Which planet has a distinctive ring system?
Answer
(B)
Saturn
49
What is the name of the galaxy that the sun is located in?
Answer
(C)
Milky Way
50
What is the approximate time it takes for the Moon to orbit Earth?
Answer
(B)
27 days