Question

what causes seasons on earth ? Also,even while the earth is rotating how can there be 2 different seasons in 2 different hemispheres ?

Answer 1

The seasons on earth are a result of the tilt of the Earth's rotational Axis.

There are two different seasons in two different hemisphere while rotating because of the change in the position of the hemisphere. When one hemisphere leans towards the sun it is summer here winter on the other. Similarly, while one is away from the sun its winter here and summer on the other.