Rotation and Revolution What causes night and day? What causes the seasons to change? Adapted From: http://www.iteachbio.com/Earth_Science/Astronomy/RotationRevolution.ppt

Rotation What does Rotation mean? Rotation occurs when something is spinning around an axis. What are some examples of things that rotate? Tops, Ballerinas, Figure skaters, cyclones, Tornadoes, a merry-go-round What are some examples of Things that rotate in outer Space? The Earth and Moon Img Source: http://evolutionarypathwayves.files.wordpress.com/2008/10/earth_rotation.jpg

Night and Day What causes night and day? The rotation of the Earth The side of the Earth that is facing the sun has daylight, the side of the Earth away from the sun has night. 1 rotation of Earth = 24 hours

Revolution What does Revolution mean? Revolution occurs when something is spinning around another object. What are some examples of things that revolve? Race cars around a track What are some examples of things that revolve in outer space? The Earth, the Moon, and the planets

Summary What is the difference between rotation and revolution? Rotation occurs when an object spins around an axis. Revolution occurs when an object spins around another object. Give me an example of something that revolves, and something that rotates. What type of movement causes night and day? The Earth’s rotation