summerizing the gizmo

Seasons are caused by revolution and the earths tilt. the earth revolves around the sun 1 time. this is called a year.during this time, different parts of the earth are getting the suns direct sunlight. this results in season. while the norther hemishper is experiancing summer, the southern is experiancing winter. while southern hemishper is experiancing summer we experiance winter. when its summer, the days are longer. when its winter the days are shorter.