Table of contents |
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Rotation of Earth |
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Revolution of Earth |
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Leap Year |
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Summer and Winter Solstice |
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Frequently Asked Questions |
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The Earth has two types of motions namely, rotation and revolution.
Rotation is the movement of the earth on its axis.
Rotation and revolution of earth
The portion of the earth facing the sun would always experience day, thus bringing continuous warmth to the region. The other half would remain in darkness and be freezing cold all the time. Life would not have been possible in such extreme conditions.
The second motion of the earth around the sun in its orbit is called revolution.
Revolution of Earth and change of seasons
Q.1: Define rotation and revolution of the Earth.
Ans: Rotation: Movement of the Earth on its axis in nearly 24 hours is termed as rotation. It is also called the daily movement of the earth.
Revolution: Movement of the earth around the Sun on a fixed path or orbit is called revolution.
Q.2: What is the circle of illumination? Why does it not coincide with the axis of the Earth?
Ans: The circle which separates day from night is called the circle of illumination. This circle does not coincide with the axis because of the inclination of the axis by 2314° towards east.
Q.3: Distinguish between rotation and revolution.
Ans: The distinction between rotation and revolution is as under:
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