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Origin and Evolution of the Universe Answers

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The presence of which element would indicate that a star is going through a high-mass star life cycle as opposed to a low-mass star life cycle?

A
hydrogen
B
carbon
C
helium
D
iron
2
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Victor drew a diagram to show the life cycle of a low-mass star.

Question illustration
A
red supergiant
B
black hole
C
white dwarf
D
supernova
3

The chart shows characteristics of stars.Sirius is a blue-white star with a surface temperature of about 9800 K.What is most likely the mass of Sirius?

Question illustration
A
1.0 solar mass
B
1.4 solar mass
C
2.0 solar mass
D
12 solar mass
4

Alana drew a diagram to compare the life cycles of low-mass and high-mass stars.

Question illustration
A
X: Nuclear fusion forms hydrogen in the main sequence star.Y: A white dwarf is part of the cycle.Z: A supernova is part of the cycle.
B
X: A white dwarf is part of the cycle.Y: Nuclear fusion forms hydrogen in the main sequence star.Z: A supernova is part of the cycle.
C
X: A protostar is part of the cycle.Y: It begins in a nebula.Z: nuclear fusion forms hydrogen in the main sequence star.
D
X: It begins in a nebula.Y: Nuclear fusion forms hydrogen in the main sequence star.Z: A protostar is part of the cycle.
5

After the supernova in a star’s life cycle, what else is formed in addition to a nebula?

A
red giant or protostar
B
neutron star or red giant
C
protostar or black hole
D
black hole or neutron star
6

Which of these forms as part of the life cycles of both low-mass and high-mass stars as a result of a star-forming nebula collapsing and spinning?

A
protostar
B
black hole
C
supernova
D
white dwarf
7

According to the big bang theory, which describes the universe before the actual big bang occurred?

A
multiple, cold, dense points, each larger than the Sun
B
multiple, hot, dense points, each smaller than an atom
C
single, cold, dense point larger than the Sun
D
single, hot, dense point smaller than an atom
8

What is the origin of all stars?

A
supernova
B
dwarfs
C
protostars
D
nebulae
9

Which describes redshifts? Check all that apply.

A
The light source and observer move closer together.
B
Observed light shifts to a longer wavelength.
C
They indicate receding galaxies.
D
Observed light shifts to a shorter wavelength.
E
The light source and observer move farther apart.
F
They indicate approaching galaxies.
10

Which best describes cosmic microwave background radiation?

A
radiation thought to exist but not yet measured
B
radiation predicted to exist in millions of years
C
radiation that existed before the big bang
D
leftover radiation from the big bang

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