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| A star is a massive, luminous ball of plasma held together by gravity. |
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| A galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas dust. |
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| A mineral is a naturally occurring solid chemical substance that is formed through biogeochemical processes and that has a characteristic chemical composition, a highly ordered atomic structure, and specific physical properties. |
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| One Major Cause of dinosaur Extinction |
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| "Planet" that doesn't count anymore as a planet |
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| The Three Ages of Dinosaurs |
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| The Triassic, Jurassic, and Cretaceous Periods |
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| Type Of Dinosaurs That Live Today |
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| Most Common Kind Of Cloud |
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