In the late 1990's, it was announced that the expansion of the Universe is accelerating. What does ...

In the late 1990's, it was announced that the expansion of the Universe is accelerating. What does this imply from the perspective of the big bang?
 
  a. A force exists that we knew nothing about that causes the acceleration.
  b. The Universe must be closed.
  c. The Universe is finite.
  d. The amount of dark matter must be greatly less than the amount of normal matter.
  e. The Universe must be infinitely old.

Question 2

A nova is a new star.
 
  a. True
  b. False
  Indicate whether the statement is true or false

Question 3

What was the temperature of the Universe when the recombination took place that produced the cosmic background radiation we observe today?
 
  a. about 2.7 K
  b. about 300 K
  c. about 3000 K
  d. about 3 million K
  e. about 3 billion K

Question 4

A white dwarf is not necessarily the color white.
 
  a. True
  b. False
  Indicate whether the statement is true or false