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17 Cards in this Set
- Front
- Back
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Astronomy. |
The study of the moon stars and other objects in space. |
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Rotation. |
The spinning motion of a planet on its axis. |
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Revolution. |
The movement of an object around another object. |
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Solstice. |
The two days of the year on wich the sun reaches its greatest distance north or south of the equator. |
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Equinox. |
The two days of the year on wich neither hemisphere points toward or away from the sun. |
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Mass. |
The amount of matter in an object. |
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Weight. |
The force of gravity on an object. |
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Inertia. |
The tendency of an object to resist a change in motion. |
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Phases. |
The diffrent apparent shapes of the moon seen from earth. |
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Eclipse. |
The partial or total blocking of an object in space. |
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Solar eclipse. |
The blocking of sunlight to earth that occurs when the moon is directly between the sun and earth. |
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Umbra. |
The darkest part of a shadow. |
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Penumbra. |
The part of a shadow surrounding the darkest part. |
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Lunar eclipse. |
The blocking of sunlight to the moon that occurs when earth is directly between the sun and the moon. |
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Tide. |
The periodic rise and fall of the level of water in the ocean. |
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Spring tide. |
The tide from the greatest difference between consecutive low and high tides. |
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Neap tide |
The tide with the least difference between consecutive low and high tides. |
