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.The universe exploded.The universe was opaque.The universe was one second old.The universe was very hot and dense.The universe expanded from a single point.

Revolt · Accepted Answer

The universe was opaque.; The universe was very hot and dense.; The universe expanded from a single point.

Question 2

Sample Response: Hydrogen and helium nuclei were formed in the universe through a process called nucleosynthesis. Deuterium (a hydrogen isotope) nuclei were formed when protons and neutrons combined. Neutrons combined with deuterium nuclei to form tritium. A proton would then fuse with tritium to form helium nuclei. What did you include in your response? Check all that apply.A process called nucleosynthesis formed the first hydrogen and helium atoms in the universe.When the protons and neutrons

Revolt · Accepted Answer

A process called nucleosynthesis formed the first hydrogen and helium atoms in the universe.; When the protons and neutrons combined, hydrogen nuclei were formed.; Hydrogen nuclei fused with neutrons, forming nuclei of deuterium.; Protons combined with deuterium, forming helium nuclei.

Question 3

Arcturus is a star whose surface temperature is 4290 K.

Revolt · Accepted Answer

107570; 107571

Question 4

A star is observed to have a temperature of 3000 K and a luminosity of 105.

Revolt · Accepted Answer

107572; 107573

Question 5

Identify the type of star that goes through these steps in their life cycles.

Revolt · Accepted Answer

✔ both low- and high-mass stars; Formation of a protostar:: both low- and high-mass stars; Formation of a black hole:: high-mass stars; Formation of a white dwarf:: low-mass stars; Formation of a red giant star:: low-mass stars; Formation of a main sequence star:: both low- and high-mass stars

Question 6

Question 107601

Revolt · Accepted Answer

107562

Question 7

Question 107602

Revolt · Accepted Answer

107563; 107564

Question 8

Which were predictions based on the big bang theory? Select all that apply.leftover radiation exists from the big banglow-mass stars become white dwarfshigh-mass stars become neutron starshydrogen and helium exist in abundancethe universe is still expanding

Revolt · Accepted Answer

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

Question 9

Explain how hydrogen and helium nuclei were first formed in the universe.

Revolt · Accepted Answer

Hydrogen and helium nuclei were formed in the universe through a process called nucleosynthesis. As the universe cooled after the Big Bang, protons and neutrons combined to form deuterium, which is an isotope of hydrogen. Neutrons then combined with deuterium nuclei to form tritium. Finally, a proton fused with a tritium nucleus to form a helium nucleus.

Question 10

Inflation: [___]

Revolt · Accepted Answer

1; Inflation:: 1; Nucleosynthesis:: 4; Formation of first stars:: 5; Formation of subatomic particles:: 3; Separation of last two fundamental forces:: 2

Origin and Evolution of the Universe Answers

More from this Course

TRY EDGENUITY HACKS