NCERT Solutions for Class 6 Social Science Geography Chapter 3 Motions of the Earth are part of NCERT Solutions for Class 6 Social Science. Here we have given NCERT Solutions for Class 6 Social Science Geography Chapter 3 Motions of the Earth.
| Board | CBSE |
| Textbook | NCERT |
| Class | Class 6 |
| Subject | Social Science Geography |
| Chapter | Chapter 3 |
| Chapter Name | Motions of the Earth |
| Number of Questions Solved | 5 |
| Category | NCERT Solutions |
Class 6 SST Geography Chapter 3 Motions of the Earth Questions And Answers CBSE
Geography Class 6th Chapter 3 Question Answer
NCERT TEXTBOOK EXERCISE (Pages 21-22)
1. Answer the following questions briefly.
(a) What is the angle of inclination of the earth’s axis with its orbital plane?
(b) Define rotation and revolution.
(c) What is a leap year?
(d) Differentiate between the summer solstice and winter solstice.
(e) What is an equinox?
(f) Why does the Southern Hemisphere experience winter and summer solstice in different times than that of the Northern Hemisphere?
(g) Why do the poles experience about six months’ day and six months’ night?
Answers:
(a) The angle of inclination of the earth’s axis with its orbital plane is 66 1/2.
(b) The movement of the earth on its axis is known as rotation.
‘ Revolution. The movement of the earth around the sun in a fixed path or orbit is known as revolution.
(c) 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) Difference between the summer solstice and winter solstice
(e) Equinox is the position of the Earth on 21st March and 23rd September. Both the hemispheres experience equal days and nights.
- On 21st March in the Northern hemisphere, this position is the spring equinox. Autumn equinox is in the Southern hemisphere.
- In the Northern hemisphere on 23rd September the position of the Earth is Autumn equinox and in the Southern hemisphere, it is the Spring equinox.
(f) The Southern hemisphere experiences winter and summer solstice in different times than, that of the Northern hemisphere because of the following reasons:
- The southern hemisphere is tilted towards the Sun on 22nd December, hence summer solstice is there in the Southern hemisphere. At that time winter solstice is in the Northern hemisphere when it is away from the Sun.
- On the contrary, on 21 June the Northern hemisphere is tilted towards the Sun.
Hence summer solstice is in the Northern hemisphere and winter solstice is in the Southern hemisphere.
(g) The poles experience six months’ day and six months’ night because of the following reasons:
- When the Northern hemisphere is tilted towards the Sun, the North Pole remains in the light for the whole of the day (24 hours). This position remains for six months (from 21st March to 23rd September).
- On the contrary in the Southern hemisphere, the South Pole does not get light during these six months. Hence it experiences night for six months (from 23rd September to 21st March).
- When the Southern hemisphere is tilted towards the sun, the South Pole remains in light for 24 hours for six months from 23rd September to 21st March. The reverse is the conditions at the North Pole-six months’ night.
Question 2.
Tick the correct answers.
(a) The movement of the Earth around the Sun is known as:
(i) Rotation
(ii) Revolution
(iii) Inclination
Answer:
(ii) Revolution
(b) Direct rays of the Sun fall on the equator on:
(i) 21 March
(ii) 21 June
(iii) 22 December
Answer:
(ii) 21 June
(c) Christmas is celebrated in summer in:
(i) Japan
(ii) India
(iii) Australia
Answer:
(iii) Australia
(d) Cycle of the seasons is caused due to:
(i) Rotation
(ii) Revolution
(iii) Gravitation
Answer:
(ii) Revolution
Question 3.
Fill in the blanks.
- A leap year has ………. a number of days.
- The daily motion of the earth is ………
- The earth travels around the sun in ……….. orbit.
- The sun’s rays fall vertically on the Tropic of ………… on 21st June.
- Days are shorter during …………. season.
Answer:
- 366
- Rotation
- Elliptical
- Cancer
- Winter
INTEXT QUESTIONS
Question 1.
What would happen if the Earth did not rotate?
Answer:
If the earth did not rotate,
- The portion before the sun would have remained the same and continued to experience day regularly.
- On the other hand, the portion of the Earth away from the sun would have experienced night continuously.
- Life would have not been possible on the Earth in such a situation.
Question 2.
Do you know in Australia Christmas is celebrated in the summer season?
Answer:
Yes, we know that in Australia Christmas is celebrated in the summer season, i.e., 25th December when there is summer in Australia (the Southern Hemisphere).
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Class 6 Social Science Geography Questions and Answers
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