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11 Cards in this Set
- Front
- Back
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solar system
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planets, along with their moons, asteroids, and other bodies, and the sun
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orbit
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specifice path each planet follows around the sun
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revolution
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one complete circuit around the sun, sweeping change
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leap year
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year with 366 days, which happens every fouth year to make calendars match the Earth's movement around the sun
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rotate
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to spin on an axis
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axis
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imaginary line that passes through the center of the Earth from the North Pole to the South Pole
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atmosphere
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layer of oxygen and other gasses that surrounds Earth
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summer solstice
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day that has the most daylight hours and the fewest hours of darkness
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winter solstice
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day of the year that has the fewest hours of sunlight and the most hours of darkness
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equinox
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either of the days in the spring and fall in which the noon sun is overhead at the Equator and the day and night are the same length
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Tropics
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are between the Tropic of Cancer and the Tropic of Capricorn, which has generally warm temperatures because it receives the direct ray of the sun for much of the year.
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