study guide-chapter 13
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Created by:
jahamilton310 on April 18, 2010
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7 terms
Terms | Definitions |
|---|---|
 Name the four types of galaxies. | spiral, barred spiral, elliptical, and irregular |
| Name the star colors. | blue, white, yellow, orange, and red |
| Which color of stars are the hottest? | blue |
| Which color of stars are the coolest? | red |
| What causes the seasons? | How the earth is tipped on it's axis. |
| What is a light year? | Measures how far light travels in a year. |
| Where does a star's energy come from? | Nuclear Fusion |
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