Origin and Evolution of the Universe

Question 1

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 2

Which shows the correct order of events during the process of nucleosynthesis?

Revolt · Accepted Answer

hydrogen nucleus formed, isotope of hydrogen, tritium formed, helium nucleus formed

Question 3

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

Revolt · Accepted Answer

hydrogen and helium

Question 4

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

Question 5

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?

Revolt · Accepted Answer

2.0 solar mass

Question 6

The Hertzsprung-Russel diagram is used to show the relationship between which two characteristics of stars?

Revolt · Accepted Answer

luminosity and temperature

Question 7

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 8

Which best describes cosmic microwave background radiation?

Revolt · Accepted Answer

leftover radiation from the big bang

Question 9

A Hertzsprung-Russel diagram is shown.

Revolt · Accepted Answer

supergiants

Question 10

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.

Origin and Evolution of the Universe Answers

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