Question

Why does the northern hemisphere experience summer 21st March to 21st September?

Answer 1

Answer:

The rotation of earth is the reason for seasons. During its rotation, the south pole of the earth moves away from the sun while the north pole comes near to the sun. The arrival of the summer season in the northern hemisphere is called summer solicited.

At this time the earth's orbit is closest to the sun and rays directly hit on the surface of the earth. It begins in March when the earth keeps on rotating on its orbit, the south pole gradually moves away and the north pole comes in front of the sun. Therefore the northern hemisphere becomes hot and intense from March to September.