What is meant by dark energy? A) the energy associated with ...

[nelaaney]

What is meant by dark energy?
 
  A) the energy associated with dark matter through E=mc2
  B) any unknown force that opposes gravity
  C) the repulsive agent causing the universal expansion to accelerate
  D) highly energetic particles that are believed to constitute dark matter
  E) the total energy in the Universe after the Big Bang but before the first stars

Question 2

If you were to take a voyage across the Milky Way, what kind of material would you spend most of your time in?
 
  A) empty spacea pure vacuum
  B) dusty molecular clouds
  C) star clusters
  D) warm, rarefied clouds of atomic hydrogen
  E) cool, dense clouds of atomic hydrogen

[fur]

Answer to Question 1

C

Answer to Question 2

D

[nelaaney]

Excellent

[Liddy]

Gracias!