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22 Cards in this Set
- Front
- Back
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Revolution
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Movement of a planet or other body orbiting another body.
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Rotation
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Spinning of planet or other body on its axis.
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Axis
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Imaginary line through the center of a planet or other body around which that body spins.
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Solar noon
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Time of day when the Sun is hightest in the sky.
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Standard Time
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System whereby all places within a time zone all have the same time.
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International Date Line
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Boundry formed where the first and 24th time zones meet.
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Perihelion
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Point in a planet's orbit at which it is closet to the Sun.
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Aphelion
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Point in a planet's orbit at which it is farthest to the Sun.
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Solstice
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Day of the year the Sun reaches its highest or lowest point in the sky.
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Equinox
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Day the Sun shines directly on the equator.
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Apogee
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Point at which the Moon is farthest from the Earth.
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Perigee
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Point at which the Moon is closest to Earth.
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Spring tide
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Tide that is higher or lower than a normal tide.
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Neap tide
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Tide that is not as high or as low as a normal tide.
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Phases
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Changing shpaes of the Moon.
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Crescent
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Phase when less than half the Moon is visible.
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Gibbous
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Phase when more than half the Moon is visible.
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Umbra
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Center or dark part of a shadow.
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Penumbra
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Light part of a shadow.
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Lunar eclipse
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Passing of the Moon through Earth's shadow.
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Solar eclipse
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Passing of the Moon between Earth and Sun.
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Corona
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Outer layer of the Sun's atmostsphere.
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