Lesson 6.3 Origin and Evolution of the Universe

Question 1

Which does the big bang theory describe?

Revolt · Accepted Answer

the origin of the universe

Question 2

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 3

Which stars have low temperatures and high luminosities?

Revolt · Accepted Answer

red giants

Question 4

Which evidence supports the big bang theory?

Revolt · Accepted Answer

the existence of cosmic microwave background radiation

Question 5

Order the evolutionary events based on time.

Revolt · Accepted Answer

0 s:: big bang occurs; 10–35 s:: inflation occurs; 10–10 s:: elementary particles form

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.

Lesson 6.3 Origin and Evolution of the Universe Answers

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