1. Aim: How can we describe the Moon
Rocky surface with:
Lunar highlands
Maria (smooth dark areas)
Many craters

2. Apollo missions 12 astronauts walked on The Moon
Neil Armstrong was the first

4. No water or atmosphere

5. Formation
Formed from the impact of the Earth and another large object (size of Mars)

6. Why does the moon look like it changes
Phases of the Moon
Caused because The Moon is revolving around the Earth and only half of the Moon is ever lit up by the Sun
Why does the moon look like it changes

7. What is the moon’s rotation and revolution?
Rotation = 27.3d
Revolution = 27.3d
What does this mean?
Only one side of the moon ever faces earth
BUT 29.5 days between full moons.
Why?
the Earth orbits around the sun, so the moon must travel through an extra distance to make one orbit with respect to the Sun.

8. Last Quarter
Waning Crescent
Waning Gibbous
New Moon
Full Moon
Waxing Crescent
Waxing Gibbous
First Quarter

9. Lunar Eclipse
A lunar eclipse occurs when the shadow of the Earth falls on the moon.
Moon
Sun
Earth

10. Lunar Eclipses can only happen during a FULL moon phase!!!

11. Umbra
Penumbra
Sun
Earth

12. Sunlight Uneclipsed Moon Penumbral Eclipse Total Lunar Eclipse
Partial Lunar Eclipse

13. (Note the ruddy scattered sunlight)
Total Lunar Eclipse
(Note the ruddy scattered sunlight)
Partial Lunar Eclipse

14. Solar Eclipses
A solar eclipse happens when the Moon blocks our view of the sun. This happens when the Moon is exactly between the Sun and the Earth.
Moon
Sun
Earth

15. Solar Eclipses can only happen during a NEW moon phase!!!!

16. Umbra
Sunlight
Penumbra
Moon
Earth

17. Total Eclipse
Total Eclipse

18. Tides Affected by The Moon’s and the Sun’s gravity
Difference between high tide and low tide is about 3 m

19. How does the moon affect tides?
Pulls the water towards it during high tide. The opposite side of the earth experiences low tide
2 high tides and 2 low tides every day. About 6 hours apart

20. How does the moon affect tides?
Spring tides occur when the moon is closest to the earth (perigee) and during new and full moons
Neap tides occur when the moon and sun are perpendicular during quarter moons

22. Sloshing of the oceans is causing the Earth to slow down in its rotation
1 Earth day a hundred million years ago was equivalent of 12 hrs today
1 Earth day in a hundred million years from now will be 42 present days long

23. The Moon experiences tides from the Earth as well
Creates frictional drag
The Moon has slowed its motion down to a 1:1 resonance with the Earth
This means that the rate of rotation is equal to the rate of revolution (the same side of The Moon always faces the Earth, hence the dark side of The Moon). This is called tidal locking.