DO NOW: WHY DOES THE MOON APPEAR TO SHINE?

1. AIM 15: Why does the moon appear to look different to us on Earth every day? DO NOW: WHY DOES THE MOON APPEAR TO SHINE? HOMEWORK: Textbook pages 197-200. Read, take notes, answer questions 2,3 and 5 on pg 207

3. 1. What percentage of the moon is lit by the sun? ALWAYS 50%... HALF

4. The moon completes one revolutionAND one rotation in 27.3 days 2. Moon Motions What does this mean? the same side of the moon ALWAYS faces Earth

5. 3. What's a moon phase? Moon phases are 
the apparent 
change in size 
and shape of the 
moon

6. Moon Phases The moon shines because of 
reflected light from the Sun. As moon revolves we see 
different portions of its lighted 
side. Phase you see depends upon the 
positions of the moon, Earth, and 
Sun Moon Phases The moon shines because of 
reflected As moon revolves we see 
different portions of its lighted 
side. Phase you see depends upon the 
positions of the moon, Earth, andSun

7. The_Moon 4 min.asf

8. 4. Moon Cycle One complete cycle of moon 
phases takes approximately 
how long? One "moon"th. Oops 
one month. 29 1/2 days

9. 5. Identifying the Phases

10.  SUN Earth

11. NEW MOON

12. NEW MOON lighted half of the moon is facing the 
sun and the dark side faces Earth

13.  SUN Earth

14. Waxing Phases - the portion of the moon we see 
is getting larger; this 
happens after the New Moon Waning phases- the portion of the moon we see is 
getting smaller; this happens 
after a Full Moon

15. Waxing Crescent

16. First Quarter Moon We see half the lighted side (one quarter of the moons surface)

17. Waxing Gibbous

18. Full Moon all of the moon's 
surface that faces 
Earth is lit up

19.  SUN Earth

20. Waning Gibbous

21. Third Quarter

22. Waning Crescent

24. Moon phases Current Moon phase http://www.calculatorcat.com/moon_phases/phasenow.php Calendar of moon phases http://www.dacre.net/moon/moonphase.html Solar Eclipse http://micro.magnet.fsu.edu/primer/java/scienceopticsu/solar/index.html

25. Review: 1. It takes the moon approximately how long to go through a complete cycle of phases? 2. Why do we only ever see one side of the moon? 3. Why does the moon appear to change shapes throughout a moonth? (oops, month) 4. Explain the position of the sun, earth, and moon during a new moon, during a full moon

26.  SUN Earth

27.  SUN Earth

28.  SUN Earth

29. 3. 2. 4.  SUN 1. Earth 5. 8. 6. 7.

30. Moon pictures show moon seen from a person 
on Earth.

31. New Moon 1 Waxing Crescent 2 7 First Quarter 3 8 6 New Moon 1 Waxing Gibbous 4 Full Moon 5 5 1 Waning Gibbous 6 Third Quarter 7 2 4 Waning Crescent 8 3

32. Click here to download a worksheet for this activity. Click on the phases of the moon and place them 
in the correct order around the Earth.

33. First Quarter Waxing Gibbous Waxing Crescent New Moon 1 New Moon Full Moon Waning Crescent Waning Gibbous Third Quarter

34. Regents Questions: A cycle of moon phases can be observed from Earth because  (1) the moon's distance from the Earth changes  (2) the moon's axis is on a tilt  (3) the moon spin's on its axis  (4) the moon revolves around the Earth Why do we always see the same side of the moon?  (1) The moon does not rotate on its axis  (2) The periods of the moon's rotation and revolution are equal  (3) The moon does not revolve around the Earth  (4) The moon's revolutionary period is just half of the moon's   period of rotation If a full moon occurs on November 1st, the next full moon phase will 
occur about:  (1) November 22nd  (2) November 30th  (3) December 6th  (4) December 13th

35. Attachments The_Moon 4 min.asf moon phases worksheet.pdf