8th Grade Earth Science

There is order in the universe.

3. For 2000 years the earth was considered to be the center of the universe. Ptolemy, an Egyptian astronomer, devised an earth centered model in the second century AD. to explain the motions of the sun, moon, stars, and planets. In the 16th century a Polish astronomer named Copernicus proposed a sun-centered model which was rejected by nearly everyone at the time. About 100 years later the work of Galileo and Kepler supported the ideas of Copernicus. (AKSci - C.3, C.7, C.8)

Examples of What Students Should Be Able to Do:

• Participate in a mock trial of Galileo.