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12 Cards in this Set
- Front
- Back
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Revolve |
go around the Sun |
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Orbit |
the path one space object takes around another |
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Rotates |
spins around it's axis |
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Axis |
the imaginary line that goes through Earth from pole to pole |
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Equinox |
in fall and spring; equal hours of day and night |
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Solstice |
in summer and winter; longest day and longest night |
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Seasons |
caused by the tilt of the Earth on its axis; winter, spring, summer, fall |
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Star |
made of helium and hydrogen; very hot; we call ours "the sun" of "sol" |
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Gravity |
the attraction between two objects; keeps the moon in orbit around the Earth and the Earth in orbit around the sun |
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Day |
when Earth is facing the sun |
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Night |
when Earth is facing away from the sun |
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Planet |
an object in space that moves around a star, has a round shape and has cleared its path of most debris |
