Origin and Evolution of the Universe

Question 1

Which statements describe some of the original ideas proposed about the universe during the big bang? Check all that apply.

Revolt · Accepted Answer

B: The universe was opaque.; D: The universe was very hot and dense.; E: The universe expanded from a single point.

Question 2

Question 2

Revolt · Accepted Answer

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Question 3

When a high-mass main sequence star runs out of both hydrogen and helium in its core, the core begins to fuse . When nuclear fusion ends in a high-mass star, the heavy elements formed in the star’s core are released through a .

Revolt · Accepted Answer

Part 1: carbon; Part 2: supernova

Question 4

Which were predictions based on the big bang theory? Select all that apply.

Revolt · Accepted Answer

A: leftover radiation exists from the big bang; D: hydrogen and helium exist in abundance; E: the universe is still expanding

Question 5

Order the events to show the evolution of the universe after the big bang. Inflation: Nucleosynthesis: Formation of first stars: Formation of subatomic particles: Separation of last two fundamental forces:

Revolt · Accepted Answer

Selection 2: 4; Selection 3: 5; Selection 4: 3; Selection 5: 2

Question 6

Arcturus is a star whose surface temperature is 4290 K. What is most likely the color of Arcturus? What is most likely the mass of Arcturus? about solar masses

Revolt · Accepted Answer

Part 1: orange; Part 2: 0.8

Question 7

Question 7

Revolt · Accepted Answer

Three pieces of evidence that support the big bang theory are: 1) The redshift of distant galaxies, which shows that the universe is expanding. 2) The cosmic microwave background radiation (CMBR), which is the leftover heat/radiation from the initial explosion. 3) The abundance of light elements, specifically hydrogen and helium, which match the predicted composition of the early universe.

Question 8

A star is observed to have a temperature of 3000 K and a luminosity of 105. What is the color of the star? What group does the star belong to?

Revolt · Accepted Answer

Part 1: red; Part 2: supergiants

Question 9

Identify the type of star that goes through these steps in their life cycles. Formation of a protostar: Formation of a black hole: Formation of a white dwarf: Formation of a red giant star: Formation of a main sequence star:

Revolt · Accepted Answer

Selection 1: both low- and high-mass stars; Selection 2: high-mass stars; Selection 3: low-mass stars; Selection 4: low-mass stars; Selection 5: both low- and high-mass stars

Question 10

Question 10

Revolt · Accepted Answer

supernova

Origin and Evolution of the Universe Answers

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