The critical density of the universe is the ________. A) ...

[RYAN BANYAN]

The critical density of the universe is the ________.
 
  A) density of water
  B) average density the universe would need for gravity to someday halt the current expansion if dark energy did not exist
  C) actual average density of the universe
  D) density of dark matter in the universe

Question 2

The atmosphere of Titan is chiefly
 
  A) ammonia. B) nitrogen. C) oxygen. D) methane. E) hydrogen.

[jonathanballen97]

Answer to Question 1

B

Answer to Question 2

B

[RYAN BANYAN]

Gracias!

[helenmarkerine]

Thanks for the timely response, appreciate it