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14 Cards in this Set
- Front
- Back
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Gravity |
The force of attraction between any two objects. |
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Mass |
The amount of matter that any object contains. |
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Orbit |
The curved path that an object follows as it revolves around another object. |
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Revolution |
Movement of an orbiting object. |
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Phases of the moon |
Changes in the moon's appearance as it orbits the earth. |
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Full moon |
When the side of the moon facing the earth is completely lighted. |
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New moon |
When the sunlit side of the moon cannot be seen. |
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Lunar eclipse |
Shadow of the earth on the moon when the earth passes between the sun and the moon. |
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Solar eclipse |
Shadow of the moon on the earth when the moon passes between the sun and the earth. |
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Tides |
Regular rising and falling of the earth's major bodies of water. |
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Telescope |
Instrument that collects light, making faint objects easier to see and enlarging distant objects. |
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Maria |
Low, flat plains on the moon. |
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Crater |
A rimmed depression (low spot) caused by a meteorite hitting the moon. |
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Meteorite |
Piece of rock that hits the surface of a planet or moon after traveling through space. |
