Origin and Evolution of the Universe

Question 1

Which statement describes redshifts?

Revolt · Accepted Answer

Redshifts occur when the light source and observer move farther apart, and the light observed shifts to a longer wavelength.

Question 2

10–35 s:

Revolt · Accepted Answer

inflation occurs

Question 3

10–10 s:

Revolt · Accepted Answer

elementary particles form

Question 4

Which evidence supports the big bang theory?

Revolt · Accepted Answer

the existence of cosmic microwave background radiation

Question 5

0 s:

Revolt · Accepted Answer

big bang occurs

Question 6

Which happened after the electromagnetic and weak nuclear forces were separated from the unified force? Check all that apply.inflationbig bangrelease of first lightnucleosynthesisformation of stars and galaxiesformation of elementary particles

Revolt · Accepted Answer

release of first light; nucleosynthesis; formation of stars and galaxies; formation of elementary particles

Question 7

Isabela is an astronomer studying stars A and B. Star A is farther away from Isabela and yet when Isabela observes the stars, the stars appear to have the same brightness.Which would be the best explanation for this?

Revolt · Accepted Answer

Star A is more luminous than star B.

Question 8

Which stars have low temperatures and high luminosities?

Revolt · Accepted Answer

red giants

Origin and Evolution of the Universe Answers

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