The movement of the Earth around the sun is known as

1

(a)

Rotation

(b)

Revolution

(c)

inclination

How much time the Earth takes about to complete one rotation around its axis.

1

(a)

24 hours

(b)

25 hours

(c)

365 days

(d)

21 days

We consider a year as consisting of how many days?

1

(a)

366 days

(b)

365 days

(c)

365 days and 6 hours

(d)

364 days

On 22nd December, which of the following receives direct rays of the sun?

1

(a)

Tropic of Cancer

(b)

Tropic of Capricorn

(c)

North Pole

(d)

South Pole

On 23rd September, what season will be in Northern and Southern hemisphere respectively?

1

(a)

Spring and winter

(b)

Winter and summer

(c)

Autumn and summer

(d)

Autumn and spring

The motion of the planets around the sun is called __________.

1

(a)

revolution

The Earth receives light from ____________.

1

(a)

sun

The axis of the Earth is an ___________ line.

1

(a)

imaginary

Earth has two motions, one is ___________ and ___________.

1

(a)

rotation, revolution

The Earth takes about ____________ hours to complete one rotation.

1

(a)

24

Days and night are changed because of revolution.

1

(a) True

(b) False

There are five seasons on the Earth mainly.

1

(a) True

(b) False

When there is summer in Northern hemisphere, there is winter in Southern hemisphere.

1

(a) False

(b) True

The axis of the Earth makes an angle of 23.5° with its orbital plane.

1

(a) True

(b) False

Life is possible in extreme conditions.

1

(a) True

(b) False

What is orbital plane?

1

(a)

The Plane formed by the orbit is known as orbital plane.

Why do areas near pole receive less heat?

1

(a)

The areas near pole receive less heat because the sun rays are slanting at poles.

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

1

(a)

The shortest night and longest day occur in the Northern hemisphere on 21st June.

On which two days the sun rays fall direct on the equator?

1

(a)

On 21st March and 23rd September, direct rays of the sun fall on the equator.

On which day the tropic of Capricorn receives direct sun rays?

1

(a)

On 22nd December, the tropic of Capricorn receives direct sun rays.

Explain the importance of leap year.

3

(a)

Why does the whole Earth not get day at the same time?

3

(a)

Compare between axis and orbit.

3

(a)

Define and discuss the significance of rotation and revolution of the Earth.

3

(a)

Why does the circle of illumination not coincide with the axis of the Earth?

3

(a)

The rotation of the Earth is responsible for causing day and night. Explain with the proper example?

5

(a)

Make a drawing to show the inclination of the earth.

5

(a)