Origin and Evolution of the Universe

Question 1

Bethany and Joquin are discussing theories about the universe. Bethany believes that since the beginning of the universe, galaxies have been moving, and will continue to move, toward Earth. Joquin argues that galaxies have been moving away from Earth.

Revolt · Accepted Answer

redshift

Question 2

A Hertzsprung-Russel diagram is shown.

Revolt · Accepted Answer

supergiants

Question 3

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

Revolt · Accepted Answer

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.

Question 4

Kathy drew a timeline to show some of the major events that occurred during the evolution of the universe.Which best describes Kathy’s error?

Revolt · Accepted Answer

Nebulae formed around 109 y after hydrogen and helium formed.

Question 5

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

Revolt · Accepted Answer

single, hot, dense point smaller than an atom

Question 6

Scientists discovered that stars in the universe are mostly composed of which elements?

Revolt · Accepted Answer

hydrogen and helium

Question 7

Which describes redshifts? Check all that apply.

Revolt · Accepted Answer

Observed light shifts to a longer wavelength.; They indicate receding galaxies.; The light source and observer move farther apart.

Question 8

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?

Revolt · Accepted Answer

iron

Question 9

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

Revolt · Accepted Answer

black hole or neutron star

Origin and Evolution of the Universe Answers

More from this Course

TRY EDGENUITY HACKS