Question

cosmology unit - extended review worksheet
name: oceaie jv092 period: __ date: __
part 1: multiple choice

1. what does the big bang theory explain?

a. the formation of stars
b. the origin and expansion of the universe
c. the life cycle of galaxies
d. the structure of solar systems
answer: ____

1. which of the following is not evidence for the big bang theory?

a. cosmic microwave background radiation
b. redshift of galaxies
c. star formation in nebulae
d. abundance of light elements
answer: ____

1. the universe is approximately how old?

a. 4.6 billion years
b. 13.8 billion years
c. 100 million years
d. 1 trillion years
answer: ____

1. what does redshift indicate about galaxies?

a. they are moving closer
b. they are stationary
c. they are moving away
d. they are changing color

Explanation:

1. The Big - Bang Theory is a scientific model that describes the origin and subsequent expansion of the universe.
2. Cosmic microwave background radiation, redshift of galaxies, and the abundance of light elements are key pieces of evidence for the Big - Bang Theory. Star formation in nebulae is a process within the universe and not direct evidence for the Big - Bang itself.
3. Current scientific consensus, based on various cosmological measurements such as the cosmic microwave background radiation and the expansion rate of the universe, places the age of the universe at approximately 13.8 billion years.
4. Redshift is a phenomenon where the light from a galaxy is shifted towards the red - end of the spectrum, which indicates that the galaxy is moving away from us due to the expansion of the universe.

Answer:

1. B. The origin and expansion of the universe
2. C. Star formation in nebulae
3. B. 13.8 billion years
4. C. They are moving away