quiz1 - Quiz 1 1)Roughly how many stars are in the Milky...

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Quiz 1 1)Roughly how many stars are in the Milky Way Galaxy? A)100 million * B)100 billion C)1 billion D)100 trillion E)10 billion 2)Suppose we imagine the Sun to be about the size of a grapefruit. How big an area would the orbits of the nine planets of the solar system cover? A)the size of a small city B)the size of a typical dorm room C)the size of a western state (e.g., Colorado) D)the size of a typical campus building * E)the size of a typical campus 3)What do we mean when we say that the universe is expanding? * A)Average distances are increasing between galaxies. B)Average distances are increasing between star systems within galaxies. C)Individual galaxies are gradually growing in size. D)Everything in the universe is gradually growing in size. E)The statement is not meant to be literal; rather, it means that our knowledge of the universe is growing. 4)How are galaxies important to our existence? * A)Galaxies recycle heavy elements produced in stars into future generations of stars.
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This document was uploaded on 01/19/2010.

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quiz1 - Quiz 1 1)Roughly how many stars are in the Milky...

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