The reason the rings of Saturn exist is because: A) the ring ...

[809779]

The reason the rings of Saturn exist is because:
 
  A) the ring material lies within the Roche limit of Saturn.
  B) the gravitational influence of Titan confines them to those orbits.
  C) the eruptions of Mimas' volcanoes are keeping them supplied with ice.
  D) there has not been sufficient time for the ring particles to form a moon.
  E) Saturn's rapid rotation is spinning material away from its equator, out into space.

Question 2

From Earth, due to their motions and the fact that the Sun lights only a portion of each surface, both Mercury and the Moon:
 
  A) always look full from Earth.
  B) appear to go through phases.
  C) pass through Earth's shadow.
  D) appear to be half-lit by the Sun.
  E) always have the same side facing Earth.

[Silverbeard98]

Answer to Question 1

A

Answer to Question 2

B

[809779]

Excellent

[adf223]

Gracias!