2. Why Do We Have Phases of the Moon?

3. Oh, by the way, what’s a phase?
Good question!
Oh, by the way, what’s a phase?

4. Phases
The changes in the appearance of the moon’s shape during a month, such as:

5. We’ve got that out of the way!
Good!
We’ve got that out of the way!

6. We have phases because the Moon revolves around the Earth.

7. Revolution
The circling of one object around another object in space. A planet revolves around the sun.  A moon revolves around a planet.

8. Earth revolves around the Sun. Moon revolves around the Earth.

9. Why does the Moon and Sun appear to move in the sky?

10. Rotation - When a planet or moon turns all the way around or spins on its axis one time.

11. As the Moon revolves around the Earth, we see different amounts of the Moon’s surface in sunlight.

12. For Example…

13. For Example…

14. For Example…

15. Let’s review the eight major phases of the Moon.

16. New Moon

17. New Moon

18. New Term Alert!
Waxing – The Moon appears to be getting larger; sunlight seen on the right-hand side.

19. Waxing Crescent

20. Waxing Crescent

21. First Quarter

22. First Quarter

23. Gibbous – Between half and full.
New Term Alert!
Gibbous – Between half and full.

24. Quick Review!
Click here for video.

25. Waxing Gibbous

26. Waxing Gibbous

27. Full Moon

28. Full Moon

29. New Term Alert!
Waning – The Moon appears to be getting smaller; sunlight seen on the left-hand side.

30. Quick Review!
Click here for video.

31. Waning Gibbous

32. Waning Gibbous

33. Last Quarter

34. Last Quarter

35. Waning Crescent

36. Waning Crescent

37. Quick Review!
Click here for video.

38. The Presentation Ends Here.