1. The Moon A natural satellite orbiting the Earth
Chapter 6
The Moon
A natural satellite orbiting the Earth

2. No water, life or atmosphere Craters (impact holes)
Features
Barren ball of rock
Diameter ¼ of Earth
Mass 1/81 of Earth
No water, life or atmosphere
Craters (impact holes)
Marias (large dark areas)

3. Atmosphere of Earth protects it from many asteroids (friction)
Surface
Many impact craters
Atmosphere of Earth protects it from many asteroids (friction)

4. Began as molten allowing for differentiation
Age
4.5 Billion years
Began as molten allowing for differentiation
Hit by asteroids billions of years ago

6. Relative size resulting it faster cooling
Heat and the Moon
Relative size resulting it faster cooling
Contains less radioactive material which generates heat
Lacks atmosphere (greenhouse effect)

7. Apollo astronauts set up seismic detectors Mass determined by orbit
Studying composition
Apollo astronauts set up seismic detectors
Mass determined by orbit
Size determined by ancient Greeks
Less dense than Earth

8. Dramatic temperature swings Interior to cool to have volcanic activity
Lack of Atmosphere
No wind
Dramatic temperature swings
Interior to cool to have volcanic activity
Mass to small to hold gases by gravity

9. Moon does rotate but same side is always facing Earth
Moon rotation
Moon does rotate but same side is always facing Earth
Synchronous rotation

11. Origin of Moon
3 theories
Capture theory=Moon was a planet of the Sun captured by Earth’s gravitational field
Twin theory=Earth and Moon were twins forming next to each other

12. Fission theory=The Earth initially spun faster than now and a bulge formed on its surface from inertia. That bulge broke off (Moon)

13. New Hypothesis
After Apollo landing
Violent Birth=The moon formed from debris from a impact from a Mars size body

15. One astronomical body casts its shadow on another
Eclipses
One astronomical body casts its shadow on another
Moon and Sun share the same relative size

18. The Sun also has some effect
Tides
The regular change in the height of the ocean is mainly caused by the gravitational pull of the moon
The Sun also has some effect

19. Moon Lore
People claim moon triggers antisocial behavior (Lunatic) No scientific proof
Blue Moon (rare event)
Moon Landing Hoax

21. Van Allen Radiation Belt
Moon to Earth kilometers
Energetic charged particles held by Earth’s magnetic field
700km to 19,000km from Earth