NCERT Solutions Class 6 Social Science (Geography)
The NCERT Solutions in English Language for Class 6 Social Science (Geography) Chapter – 3 (Motions of the Earth) has been provided here to help the students in solving the questions from this exercise.
Chapter – 3 (Motions of the Earth)
1. Answer the following questions briefly.
(a) What is the angle of inclination of the earth’s axis with its orbital plane?
Answer – The angle of inclination of the earth’s axis with its orbital plane is 66½°.
(b) Define rotation and revolution.
Answer –
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?
Answer – The year in which February is of 29 days instead of 28 days is called a leap year. Thus a leap year is of 366 days instead of 365 days.
(d) Differentiate between the Summer and Winter Solstice.
Answer –
Summer Solstice: It occurs on 21st June and is also known as the longest day of the year in the Northern Hemisphere. This is due to the position of the earth when there is summer in the Northern Hemisphere and winter in the Southern Hemisphere.
Winter Solstice: Winter Solstice occurs on 22nd December, which is also known as the shortest day of the year. At this time, the earth’s North Pole is tilted farthest from the sun. It is summer in the Southern Hemisphere and winter in the Northern Hemisphere.
(e) What is an equinox?
Answer –Equinox is the position of the Earth when the rays of the Sun fall directly on the Equator. At this position, neither of the Poles is tilted towards the Sun. As a result, the entire Earth has equal days and equal nights.
(f) Why does the Southern Hemisphere experience Winter and Summer Solstice at different times than that of the Northern Hemisphere?
Answer – Due to the revolution of the earth on its axis, the Southern hemisphere receives direct sunlight in the month of December and the Northern Hemisphere is away and receives less sunlight. Since a large portion of the Southern Hemisphere faces the sun, it experiences Summer Solstice while the other half away from the sun experiences Winter Solstice.
(g) Why do the poles experience about six months day and six months night?
Answer – Due to the angle of inclination of the earth, both the poles experience day for 6 months and night for 6 months. The pole that is tilted towards the sun receives sunlight continuously for 6 months and the pole away from the sun experiences night for 6 months.
2. Tick the correct answers.
(a) The movement of the earth around the sun is known as
(i) Rotation
(ii) Revolution
(iii) Inclination
(b) Direct rays of the sun fall on the equator on
(i) 21 March
(ii) 21 June
(iii) 22 December
(c) Christmas is celebrated in summer in
(i) Japan
(ii) India
(iii) Australia
(d) Cycle of the seasons is caused due to
(i) Rotation
(ii) Revolution
(iii) Gravitation
Answer –
(a) The movement of the earth around the sun is known as – (ii) Revolution
(b) Direct rays of the sun fall on the equator on – (i) 21 March
(c) Christmas is celebrated in summer in – (iii) Australia
(d) Cycle of the seasons is caused due to – (ii) Revolution
3. Fill in the blanks.
(a) A leap year has _______________ number of days.
(b) The daily motion of the earth is _______________.
(c) The earth travels around the sun in ______________ orbit.
(d) The sun’s rays fall vertically on the Tropic of ___________ on 21st June.
(e) Days are shorter during ___________ season.
Answer –
(a) A leap year has 366 number of days.
(b) The daily motion of the earth is rotation.
(c) The earth travels around the sun in an elliptical orbit.
(d) The sun’s rays fall vertically on the Tropic of Cancer on 21st June.
(e) Days are shorter during winter season.
NCERT Class 6 – Geography (The Earth: Our Habitat)
- Chapter 1 – The Earth in the Solar System
- Chapter 2 – Globe: Latitudes and Longitudes
- Chapter 4 – Maps
- Chapter 5 – Major Domains of the Earth
- Chapter 6 – Major Landforms of the Earth
- Chapter 7 – Our Country – India
- Chapter 8 – India Climate Vegetation and Wildlife
