Motions of the Earth

Motion of the earth on its axis in about 24 hours is called

• revolution

• rotation

• both (a) and (b)

• none of these

Motion of the earth around the sun is known as

• revolution

• rotation

• both (a) and (b)

• none of these

What is orbital plane?

• Plane formed by the axis

• Plane formed by the orbit

• Both (a) and (b)

• None of these

Which one of the following is the source of light on the earth?

• The moon

• The sun

• The satellite

• The space

The circle that divides the globe into day and night is called

• circle of darkness

• circle of day and night

• circle of illumination

• none of these

The period of one rotation of the earth is known as

• the sun day

• the moon day

• the earth day

• none of these

What would have happened if the earth did not rotate?

• Cold conditions on earth’s half portion

• Warm conditions on earth’s another half portion

• No life possible in such extreme conditions

• All of these

A year with 366 days is called

• leap year

• normal year

• both (a) and (b)

• none of these

Why do seasons change on the earth?

• Due to change in the position of the earth around the sun

• Due to no change in the earth’s position

• Both (a) and (b)

• none of the above

When do the longest day and the shortest night occur in the northern hemisphere?

• June 21

• September 23

• December 22

• March 21