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10 Cards in this Set
- Front
- Back
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Axis |
The imaginary line that goes through the North and South pole |
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Orbital Plane |
The plane of a planet and how it orbits |
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Period |
The time it takes for a planet to complete one revolution around the sun |
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Tropic of Cancer |
The lattitude line 23 degrees above the equator |
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Tropic of Capricorn |
The line 23 degrees south of the equator |
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Summer solstice |
The day with the most hours of daylight. On June 21 or 22 |
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Winter solstice |
The day with the least amount of hours of daylight. December 21 or 22 |
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Autumnal equinox |
The day where the day and night are equal. September 21 or 22 |
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Spring equinox |
The day and night are equal in hours. March 21 or 22 |
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Angle of incidence |
The angle at which the sun strikes the Earth's surface |
