How are surfaces of Mercury and the Moon similar? Different? Why? ...

[bclement10]

How are surfaces of Mercury and the Moon similar? Different? Why?
 
  What will be an ideal response?

Question 2

What evidence tells us that quasars are the centers of distant galaxies?
 
  A) Rapid variations in quasar luminosity tell us that they must be quite small in size.
  B) Quasars are extremely luminous.
  C) All quasars have large redshifts.
  D) Images and spectra show quasars to be embedded at the centers of distant galaxies.

[shewald78]

Answer to Question 1

Both are airless worlds with many ancient impact craters. On our Moon, the tides of Earth drew out the mare on the Earth side, while Mercury's lava flows were much less extensive than the mare. But as its core cooled and shrank, Mercury's crust developed huge scarps, great wrinkles that run for hundreds of miles.

Answer to Question 2

D

[bclement10]

Thank you!

[shewald78]

Always glad to help...