Evolution of the Universe

Question 1

What is the steady state model?

Answer 1

The theory that the universe is the same everywhere for all time. This means the matter would be created out of nothing to remain consistent.

Question 2

What disproved the steady state model?

Answer 2

Quasars: objects that indicate the universe was different in the past in comparison to today.

Question 3

What is the Big Bang theory?

Answer 3

1. Universe originated in one spot, where all matter and energy was condensed
2. There was an explosive expansion
3. The universe is continuing to expand

Question 4

What is evidence for the Big Bang?

Answer 4

1. Redshift: universe is expanding and must of had an origin
2. Abundance of Hydrogen and Helium: all other elements arose from hydrogen
3. Cosmic Microwave Background: It’s cooled and expanded radiation from the big bang

Question 5

What is Hubble’s law?

Answer 5

Galaxies recede at proportional distances and speeds (Hd = v)

Question 6

What are the limitations of stellar parallax?

Answer 6

1. Can only be used for very far distances
2. Only a small number of stars can be measured

Question 7

What is the limitation of cepheid variables?

Answer 7

1. The further away the more assumptions are made