CBSE Class 6 Social Science Motions Of The Earth Worksheet

Question. The movement of the Earth around the Sun is known as
i. Inclination
ii. Revolution
iii. Rotation

Answer : B

Question. Christmas is celebrated in summer in
i. Japan
ii. India
iii. Australia

Answer : C

Question. Cycle of seasons is caused due to
i. Revolution
ii. Rotation
iii. Gravitation

Answer : A

Question. Direct rays of the sun fall on the equator on
i. 22 June
ii. 21 March
iii. 22 December

Answer : B

Fill in the blanks :

Question. The daily motion of the Earth is _________.

Answer : Rotational.

Question. The Sun’s rays fall vertically on the Tropic of _________ on 21st June.

Answer : Cancer

Question. A leap year has ________ number of days.

Answer : 366

Question. Days are shorter during _________ season

Answer : Winter

Question. The Earth travels around the Sun in _________ orbit.

Answer : A fixed elliptical

Very Short Answer Type Questions :

Question. Why do the areas near the poles receive less heat?
Answer : It is because the rays of the sun are slanting on the poles.

Question. In which Hemisphere does Australia lie?
Answer : Australia lies in the Southern Hemisphere.

Question. Define circle of illumination.
Answer : The circle that divides the day from night on the globe is known as circle of illumination.

Question. Why do seasons change?
Answer : Seasons change due to the change in the position of the Earth around the sun

Short Answer Type Questions :

Question. 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. This phenomenon occurs on 21st March and 23rd September.

Question. Define rotation and revolution.
Answer : Rotation: Rotation is the movement of the Earth on its axis. A single rotation of the Earth takes about 24 hours or one day.
Revolution: The movement of the Earth around the sun in a fixed path or orbit is called Revolution. It takes the Earth 365 days to complete it’s revolution around the sun.

Question. What is the angle of inclination of the Earth’s axis with its orbital plane?
Answer : The angle of inclination is the angle made by the axis of the Earth which is an imaginary line, with its orbital plane. The angle of inclination of the Earth’s axis with its orbital plane is 66.5o.

Question. What is a leap year?
Answer : i. Earth takes 365¼ days to revolve around the Sun. However, for the sake of convenience, we consider an year as consisting of 365 days.
ii. The six hours (¼ th of 24 hours) that are ignored over a span of four years make one day (24 hours).
iii. This surplus day is added to the month of February. Thus, every fourth year, February has 29 days, and such an year (with 366 days) is known as a leap year.

Long Short Answer Type Questions :

Question. Write the difference between the summer and Winter Solstice.
Answer :

Question. Draw the diagram in plain paper :
Answer :

Motions of the Earth

A. Answer the following questions in brief:

Q1. What is rotation of Earth?
Ans. Earth rotates on its axis. It completes its round in 24 hours. This is called Rotation of the earth.

Q2. What is meant by “Inclination of the Earth’s axis”?
Ans. The axis of the Earth is an imaginary line that passes through its centre. This axis is inclined to the plane of the earth’s orbit, at an angle of 66½o.

Q3. What causes the cycles of season?
Ans. 1. The revolvation of the earth around the Sun.
2. The inclinations of the earth’s axis at an angle 66½0 to the plane of its orbit.

Q4. Where do the vertical rays of the Sun fall on June 21st?
Ans. On the Tropic of Cancer.

Q5. On September 23rd, which seasons are experienced in the Northern Hemisphere and Southern Hemisphere?
Ans. Northern Hemisphere- Autumn
Southern Hemisphere- Spring

Q6. When is the Winter Solstice?
Ans. On 22nd December.

B. Distinguish between the following:

Q7. Summer Solstice and Winter Solstice.
Ans.
Summer Solstice - On 21st June, when the Sun shines vertically on the Tropic of Cancer, is called the Summer Solstice.
Winter Solstice - On 22nd December, when the Sun shines vertically on the Tropic of Capricorn, it is called the Winter Solstice.

Q8. Spring Equinox and Autumn Equinox.
Ans.
Spring Equinox - On 21st March, it is spring in the Northern Hemisphere. It is called the Spring Equinox.
Autumn Equinox - On 23rd September, it is autumn in the Northern Hemisphere, It is called Autumn Equinox.

Q9. Rotation and Revolvation.
Ans.
Rotation                                                                      Revolvation
1. In this motion, the Earth rotates on its axis.            1. In this motion, the Earth revolves around the Sun.
2. It completes a round along its axis in 24 hours.      2. It completes its cycle in 365¼ days.
3. It causes days and nights.                                      3. It causes different seasons.

C. Give Reasons:

Q 10.The Sun rises in the east and sets in the west.
Ans. The Earth rotates from West to East. It is because of the earth’s rotation that the Sun seems to be rising in the East and setting in the West.

Q 11. Days and nights are not always equal.
Ans. The axis of the Earth is inclined to the plane of it’s orbit, at an angle of 66½o. For half of the year, Northern pole is inclined and for half of the year Southern pole is inclined towards the Sun. That’s why days and nights are not always equal.

Q 12. On June 21st, the South Pole is in continuous darkness.
Ans. On June 21st, North Pole is inclined towards the Sun and the South Pole is away from Sun rays. That’s why it is continuous darkness on South Pole.

Q 13. Why do the Sun, the Moon and the stars appear moving round the Earth, from East to West?
Ans. The Earth rotates from West to East. It is because of the Earth’s rotation that the Sun, the Moon and the stars appear moving round the Earth, from East to West.

D. Fill in the blanks:
1. The Earth rotates from West to East.
2. The axis is the line around which the earth turns.
3. The path along which Earth travels around the Sun is called the Planetary Path.
4. The polar areas experience six months long day and six months long night.

FILL IN THE BLANKS:-

1. A leap year has .................. number of days.

2. .................. are caused due to the revolution of the earth.

3. The circle that divides the day and night on the globe is called the ..................

4. The period of rotation is known as ..................

5. The longest day and shortest night in the northern hemisphere occurs on ..................

6. The earth travels around the sun in .................. orbit.

7. Days are longer with shorter nights in the .................. season.

8. The daily motion of the earth is known as ..................

9. The earth takes .................. days to revolve around the sun.

10. Days are shorter in .................. season.

11. Christmas is celebrated in summer in ..................

II ANSWER THE FOLLOWING:-

1. Name the two motions of the earth.

2. What is Rotation?

3. What is Revolution?

4. What is Circle of Illumination?

5. Name the different seasons on the Earth.

6. What is Equinox?

7. What time does the Earth takes to complete one Rotation? What is it also called?

8. What will happen if the Earth did not rotate?

9. What is Leap Year?

10. What is Summer Solstice & What is Winter Solstice?

Q1. Define the following::

Rotation, revolution, orbital plane, circle of illumination, leap year, earth day

Q2. Name two motions of the earth?

Q3. How much time earth takes to complete one rotation?

Q4. Which part of earth has day and which part has night while rotating? Explain with the help of diagram.

Q5 Why does leap year come after four years?

Q6.Explain with the help of diagram _____ summer solstice, winter solstice, equinox.

Q7 Fill in blanks:-

A)The model showing accurate shape of the earth is called__________.

B) Northern tip of the axis is called________.

C) Southern tip of the axis is called_______.

D) Earth rotates from ___________.

E) Leap year is counted after every ____ years.

F) The days and nights are caused by________.

Q8. Suppose you and your family want to visit Australia around 21 June for a week. Make a list of things that you have to pack for the trip.

I.Fill in the blanks-

1. The earth takes ______ days to complete one revolution around the sun.

2. The rays of the sun are vertical over the _________ during the summer solstice.

3. On _______ and ________ days and nights are equal duration throughout the year.

4. The longest day and shortest night occur on ________ in the southern hemisphere.

5._________ was the first astronomer to say that the earth only appeared to be stationary.

6. The Earth has _____ types of motions.

7. Rotation is also called the _______ of the earth.

8. The direction of the rotation of the earth is _______ at the North Pole.

9. The ___________ is an imaginary line which separates the lighted part of the earth from dark one.

10. ________ discovered three moons of Jupiter.

Fill in the blanks.

1. A leap year has __________ number of days.
Answer : 366

2. __________________ are caused due to the revolution of the earth.
Answer : Seasons

3. The circle that divides the day and night on the globe is called the _____________________
.Answer : Circle of illuminator

4. The period of rotation is known as ________________
Answer : Earth day

5. The longest day and shortest night in the northern hemisphere occurs on _______________
Answer : June 21^st

6. The earth travels around the sun in ________________ orbit.
Answer : Elliptical

7. Days are longer with shorter nights in the _____________________ season.
Answer : Summer

8. The daily motion of the earth is known as ____________________.
Answer : Rotation

9. The earth takes ________________ days to revolve around the sun.
Answer : 365(1⁰/4)E

10. Days are shorter in _________________ season.
Answer : Winter

11. Christmas is celebrated in summer in _________________
Answer : Australia