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15 Cards in this Set
- Front
- Back
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What is Polaris?
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Northern Star that does not move across the sky. Is stationary
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How do stars move?
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As a single group and appear to move from the Eastern horizon to the western horizon.
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Circumpolar stars
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they circle Polaris without ever dipping below the horizon.
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geocentric model
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The earth is the center of the universe and every thing revolves around the earth.
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heliocentric model
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the sun is the center of the universe and everything revolves around the sun.
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Nicholas Copernicus
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proposed the heliocentric model.
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Ptolemy
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Proposed the geocentric model
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retrograde motion
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when planets reverse direction. Mars, jupiter and Saturn will wander through the stars from west to east and occasionally switch direction and go from east to west.
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celestrial sphere
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dome of the sky that circles the earth on which all objects appear.
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The earth revolves in a __________ motion.
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counterclockwise motion
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The earth moves at a rate of ____ degrees per hour.
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15 degrees
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rotation
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earth spinning on its axis from west to east at a rate of 15 degrees per hour for 24 hours.
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rovolution
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the earth takes 365 1/4 days to make one full completion on its orbit around the sun.
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Proof of rotation
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Foucault pendulum
Coriolis effect |
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Coriolis Effect
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a system of prevailing winds on Earth forms a series of symmetrical bands located north and south of the equator. It is a result of inertia acting on a rotating planet.
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