Explain the phenomenon of seasons with the help of a diagram?
Solution- 
The reasons behind occurence of seasons are rotation of earth surrounding its axis, revolution of earth around sun , inclination of earth .
The earth moves in elliptical orbit and completes one revolution in 365 1/4 days.The axis of the earth is tilted along the orbital plane and this tilt causes season.Because of this tilt different sections of earth recieves different amount of sunlight at different times of year and hence experience changes in season.When axis faces sun the respective hemisphere experience summer. When axis faces away from summer than the respective hemisphere experiences winter.
The reasons behind occurence of seasons are rotation of earth surrounding its axis, revolution of earth around sun , inclination of earth .
The earth moves in elliptical orbit and completes one revolution in 365 1/4 days.The axis of the earth is tilted along the orbital plane and this tilt causes season.Because of this tilt different sections of earth recieves different amount of sunlight at different times of year and hence experience changes in season.When axis faces sun the respective hemisphere experience summer. When axis faces away from summer than the respective hemisphere experiences winter.