What can trigger the gravitational collapse of an interstellar ...

[HCHenry]

What can trigger the gravitational collapse of an interstellar gas cloud?
 
  A) a decrease in temperature
  B) an increase in density
  C) a rise in temperature
  D) A and B
  E) A and C

Question 2

Volcanism is more likely on a planet that
 
  A) doesn't have an atmosphere or oceans.
  B) has high internal temperatures.
  C) is closer to the Sun.
  D) is struck often by meteors and solar system debris.

[alexisweber49]

Answer to Question 1

D

Answer to Question 2

B

[HCHenry]

Wow, this really help

[scottmt]

Thanks for the timely response, appreciate it