Class 6 geography Chapter 3 Motions of the Earth Ncert Solutions are provided here. NCERT Intext and End Exercise questions of Class 6 Geography Chapter 3 Motions of the Earth.
Class 6 Geography Chapter 3 : Motions of the Earth
Motions of the Earth is the third chapter of NCERT Text book of Class 6 Geography. The end exercise and intext questions are comprised of the topics – Rotation, Revolutions, Circle of illumination, leap year, elliptical orbit, Equinox, etc
Chapter 3 : Motions of the Earth ( Ncert Solutions)
|Chapter||Chapter 3 : Motions of the Earth|
|Class||6th – ( Class VI )|
|Study Material||NCERT intext and End Exercise Solutions|
|Total Questions||3 Questions|
|Text Book||The Earth : Our Habitat|
[ NCERT Text Book in Geography for Class VI ]
NCERT Solutions Class 6 Geography Chapter 3 : Motions of the Earth
Ques. 1 : . Answer the following questions briefly.
(a) What is the angle of inclination of the earth’s axis with its orbital plane?
The angle of inclination of Earth’s Axis with its orbital plane is 66.5°.
(b) Define rotation and revolution.
Ans. Rotation is the movement of the Earth on its Axis. Earth complete one rotation in 24 hours ( one day ).
Revolution is the movement of the Earth around the sun in a fixed orbit. Earth complete its one revolution around the sun in 365 days ( one year ) .
(c) What is a leap year?
Ans. We known that the earth takes 365 days and 6 hours to complete its one revolution around the sun. For the our convenience we take one year of 365 days and ignore the 6 hours.
These saved six hours makes 24 hours in four times . That is , six hours saved every four years makes 24 hour in four year which is equal to one day.
This surplus day added in the month of February and the number of days become 29 in february in that year. This year has a total of 366 days.
Therefore the year with 366 days is called as a leap year. A leap year occurs once in every four year.
(d) Differentiate between the Summer and Winter Solstice.
Ans. Summer Solstice : On the 21st June the northern hemisphere of the earth is tilted towards the Sun . And During this day all the rays and heat from sun falls directly over the tropic of cancer. This position of earth is known as Summer Solstice.
The 21st June is the longest day and shortest night in the northern hemisphere. Summer occurs in the Northern Hemisphere while winter occurs in southern hemisphere.
Winter Solstice : On 2nd December, the southern hemisphere is tilted towards the sun . And during this day all the rays and heat from sun falls directly over the tropic of Capricorn. This position of earth is known as Winter Solstice.
The 22nd December is the longest day and shortest night in the southern hemisphere. Summer occurs in the Southern Hemisphere while winter in northern hemisphere.
(e) What is an equinox?
Ans. The position of earth when all the rays of the sun directly fall on the equator is known as Equinox. At this position, neither of pole is tilted towards the sun. So the whole earth experience equal days and equal nights.
(f) Why does the Southern Hemisphere experience Winter and Summer Solstice in different times than that of the Northern Hemisphere?
Ans. The southern hemisphere experience winter solstice and summer solstice in deferent times than that of the northern hemisphere because of the following reason-
- When the north pole is tilted towards the Sun, the northern hemisphere experience summer solstice. And during this time , the south pole is tilted away from the , therefore the southern hemisphere experience the winter solstice.
- When North Pole is tilted away from the sun , the northern hemisphere experience winter solstice. And during this time, the south pole is tilted towards the sun and therefore the southern hemisphere experiences summer solstice.
(g) Why do the poles experience about six months day and six months night ?
Ans. The north pole remains inclined towards the sun for almost 6 months. Therefore the places beyond the arctic circle experience continuous daylight for about six month.
At the same time, the south pole is tilted away from the sun for about six months. Therefore the places on the south pole experiences night for about six months.
The same condition is reversed for the next six month when the south pole is inclined towards the sun. During this time the North Pole experiences night and south pole experience day for about six months.
So due to these reasons, pole experience about six months day and six months nights.
Ques. 2 : Tick the correct answers.
(a) The movement of the earth around the sun is known as
The movement of the earth around the sun is known as revolution.
(b) Direct rays of the sun fall on the equator on
(i) 21 March
(ii) 21 June
(iii) 22 December
Ans. 21 March
Direct rays of the sun fall on the equator on 21st March
(c) Christmas is celebrated in summer in
Christmas is celebrated in summer in Australia.
(d) Cycle of the seasons is caused due to
Cycle of the seasons is caused due to Revolution.
Ques. 3 : Fill in the blanks.
(a) A leap year has _____________ number of days.
A leap year has 366 number of days
(b) The daily motion of the earth is ________________.
The daily motion of the earth is Rotation.
(c) The earth travels around the sun in __________ orbit.
The earth travels around the sun in elliptical orbit
(d) The sun’s rays fall vertically on the Tropic of ___________ on 21st June.
The sun’s rays fall vertically on the Tropic of Cancer on 21st June.
(e) Days are shorter during ____________ season.
Days are shorter during winter season.
Motions of the Earth FAQs
Q. What is Rotation of Earth ?
Ans. Rotation is the movement/motion of earth on its axis.
Q. What is Revolution of Earth ?
Ans. The movement of the earth around sun in a fixed path or orbit is known as revolution of earth.
Q. What is Equinox ?
Ans. On 21st March and September 23rd, direct rays of the sun fall on the equator. At this position, neither of the poles is tilted towards the sun; so, the whole earth experiences equal days and equal nights. This is called an equinox