Ch-2 Question and answer

2. Ans 1:
Rotation of the Earth is
depicted in this picture.
Ans 2:
Rotation is the movement
of the Earth on its axis from
west to east. This rotation
is continuous and is
responsible for continuous
cycles of day and night.

4. west east
Equator
Northern
Orbit
September 23.
summer

5. 1. True
2. False
3. False
4. False
5. False

6. Ans: The movement of Earth on its axis is known as rotation of
the Earth.
Ans: We have continuous cycle of days and nights because of the
following reason:
The Earth rotates on its axis continously.
When it rotates the part of the Earth faces the sun.
The other part does not.
The part that faces the sun has days.
The other part has nights.

7. Ans: The structure of the Earth can be described in following
ways:
The structure of the Earth is divided into three parts.
They are crust, mantle and core.
The outer solid layer of the earth is known as crust.
The highly sticky layer is known as mantle.
The deep inner part of the Earth is known as core.
Ans: The movement of the Earth around the sun is called revolution of
the Earth.

8. Ans:
Ans: When the sun is in northern hemisphere we have
summer in northern hemisphere.
1. Days and nights are equal on the Earth on March 21
because on this day sun rays fall in the vertical direction
towards the equator.
2. This supplies the equal light distribution from pole to pole
which makes the day and night duration same.

9. 1) The movement of the Earth on
its axis is known as Rotation of
the Earth.
2) The Earth takes 24 hours to
complete one rotation.
3) Day and night takes place due
to rotation.
1) The movement of the Earth
around the sun is called
Revolution of the Earth.
2) It takes 1 year (365days
and one fourth days) to
complete one revolution
3) Different seasons happens
due to revolution.

10. Axis Orbit
1. Axis is an imaginary line on it
a body rotates.
2. The movement on axis takes
lesser time to complete a
rotation.
3. In relation to the Earth the
movement on axis is known
as rotation.
1. Whereas Orbit is a course
or track on which a
heavenly body moves.
2. But movement on Orbit
takes longer time to
complete a revolution.
3. And the movement on
orbit is known as
revolution.
We can distinguish axis and orbit in the following ways