The different angles of sunlight striking the Earth's surface creates temperature differences. Earth's tilted axis causes seasons as it rotates around the sun. Earth is tilted at an angle of 23.5 degrees
Solstices are when the sun is farthest north or south of the equator. Equinoxes are when day and nigh are each about 12 hours long everywhere on Earth. As the earth orbits around the sun and on its axis, different angles of sunlight hit different parts of the earth, creating seasons.