# NCERT Solutions for Class 6 Geography Chapter 3 Motions of the Earth Social Science

Here you will get NCERT Solutions for Class 6 Geography Chapter 3 Motions of the Earth will help in building a strong foundation of concepts from the very beginning thus students will be given an easy and straightforward learning path. You must understand the basics of the subjects if you want to do well in your exams. This will be a beneficial tool because it can be used to recall various questions at any time.

## Chapter 3 Motions of the Earth NCERT Solutions for Class 6 Geography

1. Answer the following questions briefly.

(a) What is the angle of inclination of the earth’s axis with its orbital plane?

Solution

The angle of inclination of the earth’s axis with its orbital plane is 66 ½Âº.

(b) Define rotation and revolution.

Solution

Rotation is the movement of the earth on its axis.
Revolution is the movement of the earth around the sun in a fixed path or orbit.

(c) What is a leap year?

Solution

We consider one year to be made up of 365 days. The six hours that are ignored make one day (24 hours) over a period of four years. This one day is added to that year in the month of February. Therefore, after every four years February has 29 days and that year is known as a leap year.

(d) Differentiate between the Summer and Winter Solstice.

Solution

Summer Solstice Winter Solstice
It is the position of the Earth when the rays of the sun fall directly on the tropic of cancer. It is the position of the Earth when the rays of the sun fall directly on the tropic of Capricorn.
In this position, the North pole is tilted towards the sun. In this position, the North pole is tilted away from the sun.
Due to large portion of the Northern hemisphere gets light from sun, it is summer in Northern Hemisphere. Due to large portion of the Southern hemisphere gets light from sun, it is winter in Northern Hemisphere.
During this period in Northern hemisphere, days are longer than nights During this period in Northern hemisphere, nights are longer than days

(e) What is an equinox?

Solution

Equinox is the position of the earth when direct rays of the sun fall on the equator. At this position, neither of the poles is tilted towards the sun so, people on earth experience equal days and equal night.

(f) Why does the Southern Hemisphere experience Winter and Summer Solstice in different times than that of the Northern Hemisphere?

Solution

The Southern Hemisphere experiences Winter and Summer in different seasons than the Northern Hemisphere because:

• When the North Pole is tilted towards the Sun, during Summer Solstice, the Northern Hemisphere experiences warmer weather and longer days. At this time, since the South Pole is tilted away from the Sun, during Winter Solstice, the Southern Hemisphere experiences colder weather and shorter days.

• When the North Pole is tilted away from the Sun, the Northern Hemisphere experiences Winter Solstice. At this time, given that the South Pole is tilted towards the Sun, the Southern Hemisphere experiences Summer Solstice.

(g) Why do the poles experience about six months day and six months night?

Solution

The axis of the earth is tilted, due to which the sun continuously either shines or cannot be seen for a long time here. Although the earth rotates and day changes into night and night into day at other places, but the poles remain under the same stage for a much longer time due to the tilt.

(a) The movement of the earth around the sun is known as
(i) Rotation
(ii) Revolution
(iii) Inclination
Solution (ii) Revolution

(b) Direct rays of the sun fall on the equator on
(i) 21 March
(ii) 21 June
(iii) 22 December
Solution (i) 21 March

(c) Christmas is celebrated in summer in
(i) Japan
(ii) India
(iii) Australia
Solution (iii) Australia

(d) Cycle of the seasons is caused due to
(i) Rotation
(ii) Revolution
(iii) Gravitation
Solution (ii) Revolution

3. Fill in the blanks.

(a) A leap year has ____ number of days.
Solution 366

(b) The daily motion of the earth is _____.
Solution rotational

(c) The earth travels around the sun in ____ orbit.
Solution elliptical

(d) The sun’s rays fall vertically on the Tropic of ___ on 21 st June.
Solution Cancer

(e) Days are shorter during ___ season.
Solution winter