The second stage of planetary evolution is _____.

The second stage of planetary evolution is _____.
 
  A) cratering and giant basin formation
  B) ozone layer formation
  C) differentiation
  D) slow surface evolution

Question 2

Which of the following is true of Venus?
 
  A) It has polar caps of solid water.
  B) It is 50 percent the size of planet Earth.
  C) It is the fourth largest planet of the Solar System.
  D) It has a thick cloudy atmosphere that hides its surface from view.

Question 3

Earth's magnetism demonstrates that:
 
  A) part of Earth's core must be a liquid metal.
  B) Earth's core is completely made of nickel.
  C) a large part of Earth's crust is made up of metal.
  D) Earth's crust is mainly composed of magnetic material.

Question 4

According to the _____, the Moon broke from a rapidly spinning proto-Earth.
 
  A) condensation hypothesis
  B) fission hypothesis
  C) capture hypothesis
  D) large-impact hypothesis