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5 Cards in this Set
- Front
- Back
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When did our Solar System begin to form?
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5 billion years ago |
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What is a nebula?
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a large, diffuse cloud of dust and gas in space
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How did our Solar System begin to form?
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A large cloud of dust and gas began to contract under the force of gravity.
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Where did the energy of the Sun come from originally?
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thermal energy that was converted from the gravitational energy of the original nebula collapse
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The light areas of the moon were formed by
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small meteor impacts.
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