1. Moon Impact Studies

2. What do We Know About the Moon?

3. How Did the Moon Form? Large asteroid the size of Mars smashed into Earth causing debris and a large chunk of Earth shaved off. The moon started to cool

4. What Are Craters? Craters are roughly circular, excavated holes made by impact events. The circular shape is due to material flying out in all directions as a result of the explosion upon impact, not a result of the impactor having a circular shape (almost no impactors are spherical).

5. Craters Cont… Craters are the most common surface features on many solid planets and moons— Mercury and our Moon are covered with craters.

6. Why Does the Moon Have So Many Craters? http://www.space.com/15035-moon- formation-theory-challenged.html http://www.space.com/15035-moon- formation-theory-challenged.html

7. Arizona Meteor Crater

8. Types of Craters Simple impact craters have bowl-shaped depressions, mostly with smooth walls. This type of crater generally has a diameter less than 9 miles (15 km). Their depth is about 20% of the diameter.

9. Simple Impact Crater

10. Simple Crater on the Moon

11. Complex Craters Complex impact craters have a single or multiple peaks in the middle of the crater. These craters have diameters between about 12 and 110 miles (20 and 175 km), and the central uplift is usually one or a few peaks. Craters with a diameter over 110 miles (175 km) can have more complex, ring- shaped uplifts within the crater.

13. Complex Crater on the Moon

14. Simple and Complex

15. Impact Basin A impact basin is an impact crater that has a rim diameter greater than 185 miles (300 km). There are over 40 impact basins on the Moon. These catastrophic impacts produce faulting and other crust deformations. Material ejected from impact basins is distributed over wide areas.

17. http://www.usatoday.com/video/index.htm?b ctid=1508060156001 http://www.usatoday.com/video/index.htm?b ctid=1508060156001 beginnings as a ball of magma

18. Why Does the Moon Have Dark Spots and Light Spots?

19. Maria on the Moon (Sea)

20. Ejecta on the Moon

21. Regolith Regolith is a layer of loose rock that covers the hard bedrock underneath Dust Soil Broken Rock Etc.

22. http://www.youtube.com/watch?v=avX3Ae9U WTE&feature=related http://www.youtube.com/watch?v=avX3Ae9U WTE&feature=related

23. http://www.lpi.usra.edu/education/explore/sh aping_the_planets/impact_cratering.shtml http://www.lpi.usra.edu/education/explore/sh aping_the_planets/impact_cratering.shtml