Answer the following questions. You will receive immediate feedback when you select your answer or when you click on the green check mark (). When you are finished, click the How Did I Do? button to see your score.

  1. Why does the moon affect the earth's tides?
  1. What happens to the tides when the moon, earth and sun are all in line?
  1. What is a tidal bore?

For questions 4 to 7, match the following terms to the correct definition.

  1. rotation


  2. revolution


  3. tilt


  4. solar energy


  1. the spinning of a planet on its axis
  2. the path an object makes as it orbits or circles another object
  3. the factor which causes different areas of the earth to receive different amounts of light
  4. the heat and light of the sun