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

Rajasthan Board RBSE Solutions for Class 6 Social Science Geography Chapter 3 Motions of the Earth Textbook Exercise Questions and Answers.

RBSE Class 6 Social Science Solutions Geography Chapter 3 Motions of the Earth

RBSE Class 6 Social Science Motions of the Earth Textbook Questions and Answer

Question 1. 
Answer the following ques¬tions briefly:
(a) What is the angle of incli¬nation of the Earth’s axis with its orbital plane?
Answer: 
The angle of inclination of the Earth’s axis with its orbital plane is \(66 \frac{1}{2}^{\circ}\)

(b) Define rotation and revolution?
Answer:
Rotation is the spinning of the Earth on its axis. It takes about 24 hours in completing one rotation. Revolution is the movement of the Earth around the Sun in a fixed path or orbit. It completes in 365 days or 1 year.
 
(c) What is a leap year?
Answer: 
Earth takes \(365 \frac{1}{4}\) days to revolve
around the Sun. However, for the sake of convenience, we consider a year as consisting of 365 days. The six hours that are ignored make one day over a span of four years. This surplus day is added to the month of February. Thus every fourth year, the extra day is the 29th February. So such year (with 366 days) is known as a Leap Year.

(d) Differentiate between the Summer Solstice and Winter Solsitce.
Answer: 
Difference between Summer Solstice and Winter Solstice is:

(e) What is an Equinox?
Answer: 
An 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. On 23rd September, autumn Equinox occurs in Northern Hemsphere. On 21st March, Spring Equinox occurs in Northern Hemisphere.

(f) Why does the Southern Hemi¬sphere experience Winter and Summer solstice in different times than that of the Northern Hemisphere?
Answer: 
The portion of Earth which is closer, tilted towards the Sun, receives more heat and thus, experiences warmer season. So, when Northern Hemisphere is tilted towards the Sun, it experiences Summer solstice and Southern Hemisphere experiences Winter solstice. The reverse happens when Southern Hemisphere is tilted towards the Sun; it experiences summer solstice and Northern Hemisphere experiences winter season as it receives less heat.

(g) Why do the poles experience about six months day and six months night?
Answer: 
The poles experience about six months day and six months night because of the tilt of the Earth on its axis. Because of this tilt, each pole is tilted away from the Sim for about six months each. When the North pole is tilted towards the Sim, it experiences continuous daylight for six months. It is night for the same time period at the South pole. These conditions are reversed when the South is tilted towards the Sun.

Question 2. 
Tick the correct answer:
(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: 
(i) 21 March 

(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) A leap year has number of days.
Answer: 
366

(b) The daily motion of the Earth is 
Answer: 
rotation

(c) The earth travels around the. Sun in orbit.
Answer: 
ellpitical

(d) The sun's rays fall vertically on the Tropic of. on 21st June.
Answer: 
Cancer

(e) Days are shorter during season.
Answer: 
winter.