CAIE IGCSE Physics 6.1.1 The Earth Topic Practice

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Covered syllabus points

6.1.1.1—Earth rotates on its tilted axis once6.1.1.2—Earth orbits the Sun once in6.1.1.3—It takes approximately one month for6.1.1.4—Average orbital speed

Question 1

[Maximum number: 3]

Question (a)

(a)

State the equation that defines the average orbital speed v of a planet. State the meaning of any symbols you use.

[ 2 ]

Question (b)

(b)

Suggest why countries that are a significant distance from the Equator experience significant temperature variation throughout the year.

[ 1 ]

Question 2

[Maximum number: 6]

Question (a)

(a)

Fig. 10.1 represents different positions A-H of the Moon as it rotates around the Earth.

Fig. 10.1

Fig. 10.1

[ 3 ]

Question (i)

(i)

State a position of the Moon where an observer on Earth sees:
1. there is a quarter Moon
2. there is a full Moon

[ 2 ]

Question (ii)

(ii)

State the approximate time taken for the Moon to orbit the Earth.

time =..........................................................
[ 1 ]

Question (b)

(b)

The average distance of the Earth from the Sun is 1.5×108 km1.5 \times 10^{8} \mathrm{~km}.

[ 3 ]

Question (i)

(i)

Calculate the average orbital speed of the Earth in km / h.
average orbital speed = km/h [3]

[ 3 ]

Question 3

[Maximum number: 1]

It is summer in the northern hemisphere of the Earth in June.
Which statement explains why?

A

The Earth is closer to the Sun in June.

B

The Earth spins on its axis in the opposite direction to that in which it rotates around the Sun.

C

The Moon is full in June.

D

The north pole of the axis of the Earth's rotation is tilted towards the Sun in June.

Question 4

[Maximum number: 1]

Suggest why countries that are a significant distance from the Equator experience significant temperature variation throughout the year.

Question 5

[Maximum number: 3]

The average distance of the Earth from the Sun is 1.5×108 km1.5 \times 10^{8} \mathrm{~km}.

Calculate the average orbital speed of the Earth in km / h.
average orbital speed = km/h [3]

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