1. The Sun-Earth-Moon System
Comparing planet size video link

2. The moon is thought to be created from a chunk of earth that flew off after a large collision billions of years ago when the earth was still hot!
Due to a lack of an atmosphere and running water on the moon, we see large amounts of impact craters on surface
The Earth and Moon

3. Why do we always see the same side of the moon?
The Moon’s Rotational Period is equal to the Revolution Period! (27.3 days- ESRT pg. 11)
Mare Tranquillitatus
(Sea of Tranquility)
Mare Imbrium
(Sea of Rains)
Kepler
Crater
Copernicus
Makes no sense without caption in book

4. Just like Earth, the orbit is elliptical
Apogee: When Moon is furthest from Earth
Perigee: When moon is closest to earth

5. What causes the phases of the moon?

7. Some tricks to remember the difference between Waxing/Waning
Waxing – growing brighter
“Light on Right, moon grows bright”
Wax-On!
Waning- growing dimmer
Light on Left
Wan-off!

8. Checkpoint Question d
4.) What would the moon phase look like to an observer on earth at position 2? a b c d

9. Which location would an observer view the moon phase located in diagram 2?

10. A full cycle takes 29.5 days (not 27.3 days/moons revolution). WHY?

11. click here for the lunar phase simulator animation!
Click here to watch an animation on why we always see the same side of the moon!

12. What is a Lunar Eclipse? When the moon passes into Earth’s shadow.
b/c the moon is tilted 5

13. What is a Solar Eclipse? When the Earth passes into the moons (smaller) shadow) solar eclipse clip Click here to see a solar eclipse animation!

14. When do Eclipses occur. Why do they not occur each month
When do Eclipses occur? Why do they not occur each month? Click here to see the inclined orbit of the moon!
When?
A solar eclipse occurs during: NEW MOON
A Lunar Eclipse occurs during: FULL MOON
Why?
Because the Moon’s orbit tilted 5˚, it’s rare we experience solar and lunar eclipses!

15. Only some portions on earth will pass in the moons penumbra, thus a total solar eclipse is VERY rare!

16. Tides: The gravitational pull between the moon and the earth causes the tides
This is a cyclic change and a predictable event, because the lunar cycle is cyclic and predictable!

17. As the Earth rotates (24 hours), location “x” will experience 2 low tides and 2 high tides each day
Locations in line with the moon experience high tides due to greater pull
Locations at right angles to the moon experience low tides due to lower pull.

18. Tidal Ranges (max-min. height) vary based upon the moon’s phase

19. Neap Tides have the lowest range due opposing pull from the sun and the moon

20. Identifying High and Low Tides

21. Predicting Next High and Low Tides
Approximately 1-2 a.m. , low: 7-8 a.m. (from high tide to the next high tide is considered one period)

22. Other facts about tides
In the Bay of Fundy the tides have a range of about 44 ½ feet!
The tidal effect is amplified anywhere in a bay or estuary
(more water forced
in/more water
drained out)

23. Class activity links Lunar Calendar Today's Moon Phase
Moon Phase (without names)