1. PHASES OF THE MOON

2. Why does the moon’s shape change?
It does not change.
We just can’t see all of the
lighted-up part all the time.

3. Watch the animation – make sure you see why the moon appears to change its shape.

4. Names of the phases
WAXING = GETTING BIGGER
WANING = GETTING SMALLER

5. The moon as a clock When the FULL MOON is rising, about
what time is it?
a. sunrise b. noon c. sunset d. midnight
(Think of the sun-earth-moon angle
when the moon is full – 180o )

6. The moon as a clock When the FULL MOON is rising, about
what time is it?
a. sunrise b. noon c. sunset d. midnight

7. The moon as a clock
When the QUARTER MOON is rising, about what time is it?
a. sunrise b. noon c. sunset d. midnight
(Think of the sun-earth-moon angle
when the moon is a quarter phase – 90o )

8. The moon as a clock
When the QUARTER MOON is rising, about what time is it?
b. noon or d. midnight
(depending on which quarter – first or last)

9. It takes 29.5 days for
the moon to go through
one complete cycle
(about 1 month).

10. Why can we sometimes see the
NON-LIGHTED part of the moon
during the crescent phase??

11. EARTHSHINE Why can we sometimes see the NON-LIGHTED part
of the moon during the crescent phase??
EARTHSHINE
Reflected light
From EARTH