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17 Cards in this Set
- Front
- Back
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astronomy |
The study of moon, stars, and other objects in space. |
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rotation |
The spinning motion of a planet on it's 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 which the sun reaches it's greatest distance north or south of the equator. |
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equinox |
The two days of the year on which neither hemisphere is tilted torward 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 |
One of the different apparent shapes of the moon as seen from Earth. |
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eclipse |
The partial or total blocking of one object in space by another. |
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solar eclipse |
The blocking of sunlight between 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 with the greatest difference between consecutive low and high tides. |
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neap tide |
The tide with the least difference bewteen consecutive low and high tides. |
