1. Does the Earth revolve or rotate around the sun? REVOLVES How long does one revolution take? ~ 1 year Does the moon revolve or rotate around the Earth? REVOLVES How long does one revolution take? ~ 1 month

2. Approximately how much time passes between the phases of the moon? 1 month ~ 30 days There are 8 phases of the moon 30 divided by 8 ~ 3.8 days

3. How long does it take for the Earth to complete one rotation? 24 hours Approximately how many hours pass from sunrise to sunset? 12 hours

4. We ONLY see one side of the moon! True False WHY?

5. Which of the diagrams below illustrates a lunar eclipse? solar eclipse? SOLAR LUNAR

6. Which arrow is pointing to the penumbra? umbra?

7. http://www.teachertube.com/viewVideo.php?video_id=657&title=What_Causes_Seasons_on_Earth

10. If the sun were to just disappear someday, what would happen to the Earth?

11. What keeps the earth in orbit? GRAVITY What TWO factors affect the strength of a gravitational force? MASS & DISTANCE http://www.teachertube.com/viewVideo.php?video_id=539

12. Force of Gravity on the Rocket