When is/was gravitational contraction an important ...

[Medesa]

When is/was gravitational contraction an important energy-generation mechanism for the Sun?
 
  A) only during solar minimum
  B) only during solar maximum
  C) when the Sun was being formed from a collapsing cloud of gas
  D) right after the Sun began fusing hydrogen in its core
  E) when the Sun transports radiation through the convection zone

Question 2

Why did the Moon's internal heat escape more rapidly than Earth's?
 
  What will be an ideal response?

[zogaridan]

Answer to Question 1

C

Answer to Question 2

Because of the Moon's small size, heat could escape more quickly. The Earth's rocky layers act as a layer of insulation, making it harder for the heat to escape.

[Medesa]

Excellent

[AISCAMPING]

Gracias!