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7 Cards in this Set
- Front
- Back
planet |
a large object that moves around the sun |
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gas |
a substance with no shape that spreads to fill any space that holds it |
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revolve |
to circle another object |
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core |
the inner part of a planet that is made of metal or rock |
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spacecraft |
a vehicle that travels or is used in space |
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surface |
the outside or outermost area of something |
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atmosphere |
the mixture of gases around the surface |
