Today, an average lunar moonquake releases about as much energy ...

[theo]

Today, an average lunar moonquake releases about as much energy as
 
  A) an atomic bomb.
  B) a firecracker.
  C) a major U.S. city uses in 1 year.
  D) the Mount St. Helens eruption.
  E) the most powerful earthquake ever recorded.

Question 2

Briefly describe the two main lines of evidence for the modern theory of the moon's formation, wherein the Earth was hit by an approximately Mars-sized object.
 
  What will be an ideal response?

[jessofishing]

Answer to Question 1

B

Answer to Question 2

The moon's composition is similar to the light rocks from the Earth's upper layers, and it has a low amount of water (which would have been vaporized in the impact).