Study

Earth's Motion

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  • What do we call the theory of astronomer Copernicus that stated that the Sun is at the center of the solar system?
    heliocentrism
  • One half of the Earth is called a ______
    hemisphere
  • When the Eastern hemisphere is facing the sun, the Western hemisphere is experiencing ______
    nightime
  • A sphere is _____
    a round, three-dimensional object like a beach ball
  • The Earth's axis is always pointed in which direction? (N, S, E or W)
    to the North (the North Star -- Polaris)
  • "Revolve" means __________
    to go around or orbit something
  • Is a spinning top an example of rotate or revolve?
    rotate
  • Heliocentrism is ____
    Copernicus' theory that the Sun is at the center of the solar system
  • In what direction does the Earth rotate?
    counterclockwise (left to right)
  • How long does it take the Earth to make one complete revolution around the Sun?
    365 days
  • An imaginary line that runs through the center of the Earth from the geographic North pole to the geographic South Pole is called ___
    axis
  • What is a round, three-dimensional object, like a beach ball called?
    a sphere
  • Is a tetherball going around a pole an example of rotate or revolve?
    revolve
  • Is a ballet dancer pirouetting (turning on pointed toe) an example of rotate or revolve?
    rotate
  • What is an axis?
    An imaginary line that runs through the center of the Earth from the North Pole to the South Pole
  • Is a horse on a merry-go-round an example of rotate or revolve?
    revolve
  • How long does it take Earth to complete one full spin or rotation?
    24 hours
  • Another word for revolve is _______
    orbit
  • What holds the Earth and the other planets in their orbits?
    the Sun's gravity
  • To spin on an axis is called __________
    rotation
  • Earth's axis is tilted _______ degrees in relation to the Sun.
    23.5
  • Name an object that is a sphere
    A globe, a beach ball, an orange
  • "Rotate" means ____________
    to spin on an axis
  • To go around or orbit something is called ______
    revolution