9th Grade Earth Science

There is order in the universe.

1. The stars differ from each other in size, temperature, and age, but they appear to be made up of the same elements that are found on the earth and to behave according to the same physical principles. Most stars are in systems of two or more stars orbiting around one another. (AKSci - A.3)

Examples of What Students Should Be Able to Do:

• Describe the sun's stage within the star cycle.
• Infer the steps in the evolution of our sun.
• Compare the Milky Way with other galaxies.