Question

What are the effects of rotation and revolution?

Answer 1

Rotation:

• The rotation of the earth causes day and night. 
• As the earth is spherical in shape, only one half of it is illuminated by the sun at a time. The other half remains dark.
• The illuminated portion of the earth experiences day and the other part of the earth experiences night.

Revolution:

• The movement of the earth around the sun is called revolution.
• The revolution of the earth causes seasons. 
• The revolution of the earth gives the impression that the sun is moving north and south of the equator.
• The equator faces the Sun directly on March 21 and September 23.
• During these two days the day and night are equal throughout the earth. These two days are called Equinoxes.
• On June 21, the Tropic of Cancer faces the sun. This is known as summer solstice. It is the longest day in the
• Northern Hemisphere and longest night in the Southern hemisphere.