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17 Cards in this Set
- Front
- Back
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rotation
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it takes 24 hours for the Earth to spin on its axis
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axis
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an imaginary line through the Earth from the North and South Poles
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equinox
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means equal night; the two times of year when day and night hours are equal.
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spring equinox
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March 21
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vernal equinox
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September 21
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summer solstice
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longest day of the year; June 21
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winter solstice
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shortest day of the year; December 21
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equinox
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means equal night; the two times of year when day and night hours are equal.
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spring equinox
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March 21
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vernal equinox
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September 21
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summer solstice
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longest day of the year; June 21
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winter solstice
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shortest day of the year; December 21
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hemisphere
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the top half or bottom half of the earth, separated by the equator
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solar angle
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the angle at which light strikes the earth
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tilt
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the angle of the Earth's axis; 23.5 degrees
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revolution
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the Earth's path around the sun; takes 365 days
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North Star
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also called Polaris; the Earth's axis always points this way
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