NCERT Class 6 Geography Chapter 3 Question Answers cover the book exercise in a simplified and precise way. NCERT Class 6 Geography Chapter 3 Question Answers are easy to understand and learn for exams.
#Motions of the Earth
NCERT Class 6 Geography Chapter 3 Question Answers
(a) What is the angle of inclination of the earth’s axis with its orbital plane?
Answer: 66.5 degrees
(b) Define rotation and revolution.
Answer: Rotation is the spinning motion of the Earth about its axis.
Revolution is the motion of the Earth around the Sun in a fixed path called the orbit.
(c) What is a leap year?
Answer: Any year that has a total of 366 days is called a leap year. In a leap year, February month has 29 days.
(d) Differentiate between the summer solstice and winter solstice.
Answer:
| Summer Solstice | Winter Solstice |
|---|---|
| Position of the Earth in orbit when the hemisphere having the summer season experiences the longest day and the shortest night. | Position of the Earth in the orbit when the hemisphere having the winter season experiences the longest night and the shortest day. |
| Northern Hemisphere experiences the Summer Solstice on 21 June and Winter Solstice on 22 December every year. | Southern Hemisphere experiences the Summer Solstice on 22 December and Winter Solstice o 21 June every year. |
(e) What is an equinox?
Answer: Equinox is the position of the Earth in the orbit in such a way that the sun rays fall directly on the Equator and both the hemispheres receive an equal amount of heat and light. Hence the length of days and nights will be equal.
On 21 March and 23 September, the Earth experiences the equinox. At this position, the poles are neither titled away from the Sun nor towards the Sun.
(f) Why does the Southern Hemisphere experience Winter and summer solstice at different times than that of the Northern Hemisphere?
Answer:
Both hemispheres experience seasons opposite to one another because of the tilt of the Earth. Hence the summer and winter solstice occurs at different times for both hemispheres.
When the Southern Hemisphere experiences the summer season and summer solstice, the Northern Hemisphere will experience the winter season and winter solstice and vice-versa.
(g) Why do the poles experience about six months of day and six months of night?
Answer: Because of the tilt of the Earth, one pole will be away from the sun and the other will be towards the sun. One pole continuously experiences sunlight and the other experiences continuous for six months.
When the North Pole is tilted towards the sun, it experiences brightness for 6 months and in the same period, the South Pole experiences 6 months of darkness.
NCERT Class 6 Geography Chapter 3 Question Answers – MCQs
The movement of the earth around the sun is known as
(A) Rotation
(B) Revolution
(C) Inclination
Direct rays of the sun fall on the equator on
(A) 21 March
(B) 21 June
(C) 22 December
Christmas is celebrated in summer in
(A) Japan
(B) India
(C) Australia
The cycle of the seasons is caused due to
(A) Rotation
(B) Revolution
(C) Gravitation
Fill in the Blanks
1. A leap year has 366 days.
2. The daily motion of the earth is rotation.
3. The earth travels around the sun in an elliptical orbit.
4. The sun’s rays fall vertically on the Tropic of Cancer on 21st June.
5. Days are shorter during the winter season.