Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key


Play button


Play button




Click to flip

15 Cards in this Set

  • Front
  • Back
What is Polaris?
Northern Star that does not move across the sky. Is stationary
How do stars move?
As a single group and appear to move from the Eastern horizon to the western horizon.
Circumpolar stars
they circle Polaris without ever dipping below the horizon.
geocentric model
The earth is the center of the universe and every thing revolves around the earth.
heliocentric model
the sun is the center of the universe and everything revolves around the sun.
Nicholas Copernicus
proposed the heliocentric model.
Proposed the geocentric model
retrograde motion
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.
celestrial sphere
dome of the sky that circles the earth on which all objects appear.
The earth revolves in a __________ motion.
counterclockwise motion
The earth moves at a rate of ____ degrees per hour.
15 degrees
earth spinning on its axis from west to east at a rate of 15 degrees per hour for 24 hours.
the earth takes 365 1/4 days to make one full completion on its orbit around the sun.
Proof of rotation
Foucault pendulum
Coriolis effect
Coriolis Effect
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.