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16 Cards in this Set
- Front
- Back
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autumnal equinox
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the day and night are of equal lengths; the official beginning of fall
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winter solstice
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the shortest day and longest night of the year; the official beginning of winter
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vernal equinox
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the day and night are of equal lengths; the official beginning of spring
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summer solstice
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the longest day and shortest night of the year; the official beginning of summer
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axis
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the imaginary line running through the center of the earth from pole to pole
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plane of revolution about the sun
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the route that the earth follows around the sun
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causes the seasons
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the tilt of the earth's axis
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solar year
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365 1/4 days
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Polaris
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the north star
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parallels of latitude
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the imaginary lines circling the earth horizantally
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Tropic of Cancer
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the tropic located north of the equator
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Tropic of Capricorn
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the tropic located south of the equator
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band of twilight
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a narrow zone bordering the sunlit side of the earth
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tropics
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the regions lying near the equator between the Tropics of Cancer and Capricorn
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zenith
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the top of the sky
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"the land of the midnight sun"
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Arctic
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