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25 Cards in this Set
- Front
- Back
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Earth
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sphere that moves in 3 ways
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3 ways Earth moves
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1. Rotating
2. Revolving 3. Orbit |
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Direction Earth rotates
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Counterclockwise
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Equators are "fatter" because..
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iron in core becomes magnetized
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Kepler's Law of Motion
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First Law:
Second Law: Third Law: |
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Number of Time Zones
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24 Time Zones
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Distance of each Time Zone
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15 degrees wide
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Number of Time Zones in the United States
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4 Time Zones
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Names of Time Zones in USA
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- Pacific
- Central - Mountain - Eastern |
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Time of Revolution
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365.25 Days
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What type of orbit does Earth have around the sun
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- Perihelion - Jan. 3
- Aphelion - Beginning of July |
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Tilt of Earth's Axis
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23.5 degrees
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Tilt causes...
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Seasons
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Northern Hemisphere points toward sun.
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Summer Here.
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Southern Hemisphere points toward sun.
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Winter Here
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Vernal Equinox
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March 20-21 (Equal Day and Night)
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Autumnal Equinox
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Sept. 22-23 (Equal Day and Night)
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Summer Solstice
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June 20-21 (Days are longer, nights are shorter)
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Winter Solstice
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Dec. 21-22 (Shorter Days, longer nights)
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Earth travels...
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66,000 mph
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Tropics
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The regions closest to the equator; the hottest parts of the Earth where the Sun shines directly overhead
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Hemisphere
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Half of the Earth as divided by equator.
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Axis
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Imaginary line around Earth which spins that the Earth tilts and rotates on.
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Distance Earth Travels Each Year
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595 million miles
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Time Earth takes to turn on axis
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23.56 hours
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