QUESTION 10 Chapter 4,.4.1. Why are most craters on the Moon round? O a Because

Question

QUESTION 10 Chapter 4,.4.1. Why are most craters on the Moon round? O a Because most asteroids hit the Moon from straight overhead o b. O c. o d. Because impacts happen at such great speeds that they behave like explosions Because oval craters tend to round themselves over time Most craters on the Moon are not round QUESTION 11 Chapter 4.4.1. 16. Which characterizes complex craters? O a. Terraces of slump blocks around the crater rims O D Bowl-shaped depressions that lack a central uplift O c. Craters that only form if the impact angle falls at an angle below 10 degrees O d. All of the above QUESTION 12 Chapter 4.4.1. What kind of craters are the Moon's Orientale and Callisto's Valhalla (the latter misspelled in the book)? O a Microcraters o b. O c. Simple craters Complex craters with peaks in the center O d Multi-ring basins

Explanation / Answer

10. The answer is b=bcause the impacts happen at such great speeds that they behave like explosions
Because before the impact they travel with tens of kilometers per second and at impact , they release huge kinetic energy.

11. The answer is a= terraces of slump blocks around rim
This is because the other two options are the characteristics of simple crater.

12.The answer is c=complex craters with paks in center
These are large and are called impact basins. 250 miles wide and have almost 6 inner concentric rings.

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