1. Vocabulary 26. Waxing—The “lit” part of the moon is getting bigger!
(Darkside is on the left!)
27. Waning—The “lit”
is getting smaller!
(Darkside is on the right!)

2. Moon Phases
Draw and label these carefully! Pay attention to detail!
New Moon

3. Moon Phases
Waxing Crescent

4. Moon Phases
First Quarter

5. Moon Phases
Waxing Gibbous

6. Moon Phases
Full Moon

7. Moon Phases
Waning Gibbous

8. Moon Phases
Third Quarter

9. Moon Phases
Waning Crescent
What comes next - ????

10. Moon Phases
Waning Crescent
What comes next - ???? New moon!

12. Gibbous vs Crescent

13. Lunar Cycle:
Number of days for rotation - ???

14. Lunar Cycle:
Number of days for rotation
Number of days for revolution – ????

15. Lunar Cycle:
Number of days for rotation
Number of days for revolution – 29.5

16. Lunar Cycle:
Number of days for rotation
Number of days for revolution – 29.5
We always see the same side of the moon – T/F ???

17. Lunar Cycle:
Number of days for rotation
Number of days for revolution – 29.5
We always see the same side of the moon – True

18. Where did the moon come from?
Class read. Page 40.

19. Why does the Earth not spin around the moon.
If the moon pulls on the earth as strongly as the earth pulls on the moon,y doesn't the earth circle the moon?
They both do rotate around a central point. This point is 900 miles under the surface of the Earth called the barycenter.

20. Why does the Earth not spin around the moon cont.
According the Newton's third law, the Moon exerts a force on the Earth and the Earth exerts an equal and opposite force on the Moon. The Moon is more heavily influenced by that amount of force because it has a much smaller mass. As a result, the two spin around their center of mass, which is actually within the Earth.

21. Why does the Earth not spin around the moon cont.
The earth and moon revolve around their center of mass, so the answer to your inciteful question is...they do. Except it's not midway between them, since the earth is 4 times the diameter of the moon. If a 400 lb. man stood on one end of a plank, a 00 lb. man on the other end, the balancing point would be much closer to the heavy man.

22. Interesting Question
What keeps the moon in orbit? Why doesn’t the sun steal it?

23. Earthshine!
Why do we sometimes see the outline of the darkside of the moon?
Earthshine is the reflection of light off the Earth (from the sun) on to the moon.

24. Lunar Eclipse
Occurs when the Earth blocks the light from the sun from getting to the moon.

25. Solar Eclipse
Occurs when the moon blocks the light from the sun from getting to Earth