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38 Cards in this Set
- Front
- Back
where did aristarchus study?
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alexandria
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aristartcus calculated the distance between the moon___ and ___.
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moon and the earth
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name the 5 elements
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eather, earth, air, fire, water
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The earth is surrounded by_______.
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water
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What are the eight spheres?
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moon, sun, stars, planets
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Aristotle believed the seasons were caused by, what?
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when the sun was higher or lower in the sky
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what is a geocentric model
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Aristotle's idea about the earth as the center of the universe
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Who suggested a theory that the sun was the center of the universe?
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Arsitarchus
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The planets revolve around the ________.
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sun
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what is the heliocentric model?
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the theory that the sun is the center of the universe
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What did Aristarchus believe night and day were caused by?
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the earth's rotation on its axis
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Aristarchus believed the sun was ___ and _____ away than thought before.
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farther away and larger
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Who had similar ideas to Aristotle?
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Ptolemy
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Ptolemy belived the ______ moved around the earth
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sun
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Ptolemy belived the ______ moved around the earth
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sun
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what was hipparchus called?
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the greatest astronomer of antiquilty
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were did hipparchus build his observatory?
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Rhodes
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Anaxagoras said the moon had ____, ____, and _______.
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revines, mountains, and valleys
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What is astronomy?
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the study of the planets, stars, adn everything in space
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What is retrograde motion?
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when a planet aparently goes foreward then backwards then forwards again
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describe celestial
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of or relating to the sky or the heavens
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what is geocentric?
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the earth being the center of the universe
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what is heliocentric
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when the sun is the center of the universe and the earth goes around the sun
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describe astrolabe
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an instrument that was used to to determine the altitude of the sun and other celestial objects
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what is gnomon
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an object like a sundial that projects a shadow.
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what is rotation?
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the act or process of turning around
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describe revolution
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spinning on it's axis
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what is aparentmotion
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when an object apears to be moving because another object is moving
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Aristarchus said mars varies in ____ because sometimes it's closer to the earth.
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brightness
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say the lines on the planet in order from north to south.
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artic circle, tropic of cancer, equator, tropic of capricorn, and antartic circle
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how many days in one year
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365
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planets wander in and out of stars
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true
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the star patterns, or constellations, change shape from night to day
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false
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the moon is closer to the earth than the sun is
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true
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the only time you can see the moon is at night
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false
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we always see the same side of the ____.
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moon
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when is your shadow the shortest
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the first day of summer at noon
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each day the sun rises due east and sets due west
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false
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