Astronomy chapter 19 test
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- where did aristarchus study?
- alexandria
- aristartcus calculated the distance between the moon___ and ___.
- moon and the earth
- name the 5 elements
- eather, earth, air, fire, water
- The earth is surrounded by_______.
- water
- What are the eight spheres?
- moon, sun, stars, planets
- Aristotle believed the seasons were caused by, what?
- when the sun was higher or lower in the sky
- what is a geocentric model
- Aristotle's idea about the earth as the center of the universe
- Who suggested a theory that the sun was the center of the universe?
- Arsitarchus
- The planets revolve around the ________.
- sun
- what is the heliocentric model?
- the theory that the sun is the center of the universe
- What did Aristarchus believe night and day were caused by?
- the earth's rotation on its axis
- Aristarchus believed the sun was ___ and _____ away than thought before.
- farther away and larger
- Who had similar ideas to Aristotle?
- Ptolemy
- Ptolemy belived the ______ moved around the earth
- sun
- what was hipparchus called?
- the greatest astronomer of antiquilty
- were did hipparchus build his observatory?
- Rhodes
- Anaxagoras said the moon had ____, ____, and _______.
- revines, mountains, and valleys
- What is astronomy?
- the study of the planets, stars, adn everything in space
- What is retrograde motion?
- when a planet aparently goes foreward then backwards then forwards again
- describe celestial
- of or relating to the sky or the heavens
- what is geocentric?
- the earth being the center of the universe
- what is heliocentric
- when the sun is the center of the universe and the earth goes around the sun
- describe astrolabe
- an instrument that was used to to determine the altitude of the sun and other celestial objects
- what is gnomon
- an object like a sundial that projects a shadow.
- what is rotation?
- the act or process of turning around
- describe revolution
- spinning on it's axis
- what is aparentmotion
- when an object apears to be moving because another object is moving
- Aristarchus said mars varies in ____ because sometimes it's closer to the earth.
- brightness
- say the lines on the planet in order from north to south.
- artic circle, tropic of cancer, equator, tropic of capricorn, and antartic circle
- how many days in one year
- 365
- planets wander in and out of stars
- true
- the star patterns, or constellations, change shape from night to day
- false
- the moon is closer to the earth than the sun is
- true
- the only time you can see the moon is at night
- false
- we always see the same side of the ____.
- moon
- when is your shadow the shortest
- the first day of summer at noon
- each day the sun rises due east and sets due west
- false