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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 |
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Axis |
The imaginary line that passes through Earths center and the North and South poles |
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Rotation |
The spinning of earth on its axis |
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Revolution |
The movement of one object around another |
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Orbit |
A path an object revolves around |
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Calendar |
A system of organizing time that defines the beginning, length, and divisions of a year |
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Solstice |
When the sun is farthest from the equator North or South |
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Equinox |
The two days of the year in which neither hemisphere is tilted toward or away from the sun |
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Phases |
The different shapes of the moon you see from earth |
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Eclipse |
The partial or total blocking of one object in one space by another |
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Solar eclipse |
When a new moon blocks the view of the sun |
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Umbra |
The very darkest part of the moon's shadow |
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Penumbra |
The larger, less dark part of the umbra |
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Lunar eclipse |
Occurs at a full moon when Earth is directly between the moon and the sun |
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Tides |
The rise and fall of the ocean |
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Spring tide |
Combined forces produce a tide with the greatest difference between consecutive high and low tides |
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Neap tides |
A tide with the least difference between consecutive low and high tides |
