The earth turns on its axis every day; it orbits the sun, just like all the other planets in our Solar System. When viewed from space, it turns counter-clockwise.
Because it rotates around the earth at the exact same speed as it rotates around its own axis, so that the same side of the moon is constantly facing the surface of the earth.
Tilt of the earth on its axis is responsible for season formation. The amount of sunlight obtained by various regions on earth surface is regulated by tilt. The places of earth that are facing the Sun and get direct sunlight experiences summers while the others which are facing away from the Sun experience winter season.
