Science study guide-ch. 9
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Created by:
tweetybirdforszt on April 11, 2010
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Description:
Study guide for Chapter 9 Science test.
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15 terms
Terms | Definitions |
|---|---|
 hydrogen and helium | The sun is mostly composed of: |
| Mercury | closest to the sun |
| meteors | pieces of space rock that burn up |
| constellations | patterns formed by groups of stars |
| outer planets | planets beyond the asteroid belt |
| comets | dirty snowballs |
| gravity | force of attraction between objects |
| inner planets | planets closest to the sun |
| asteroid belt | region between Mars and Jupiter |
| inertia | tendency of object to keep moving in a straight line |
| planet | an object that travels around a star |
| solar system | the sun and the objects that travel around it |
| Mercury, Venus, Earth, Mars | the inner planets |
| star | a huge, hot ball of gas that gives off its own light |
| mass and distance | gravity depends on these |
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