Deck 82: The Curvature and Expansion of Universes

Question 1

Einstein's original theory of general relativity predicted this, but Einstein could not believe it was true, and added the cosmological constant to his theory to prevent this prediction.

A) a static universe
B) the existence of dark matter
C) motion of the universe
D) creation of helium

Answer 1

motion of the universe

Question 2

The value of omega which gives you a recollapsing universe is ____.

A) >1
B) =1
C) <1
D) <0

Answer 2

>1

Question 3

In which type of universe would the angles of a triangle add up to more than 180 degrees?

A) Positive curvature and closed
B) Positive curvature and open
C) Negative curvature and closed
D) Negative curvature and open

Answer 3

Positive curvature and closed

Question 4

The factor needed to find out if the universe expands forever or recollapses is the ____.

A) critical density
B) supernova 1a
C) nuclear constant
D) gravitational constant

Question 5

Omega is the ________.

Question 6

A Big Crunch will occur if omega is _______________.

Question 7

If omega is greater than 1, then the universe is open.

Question 8

If omega is 1, then the universe is at critical density.