HELP, END OF SCHOOL YEAR, 30 POINTS Unit 9 lesson 15 astronomy unit test answers I ONLY HAVE ONE MORE DAY 1 As evidence supporting the Big Bang theory, what does the redshift of light from galaxies indicate?
The universe is mainly hydrogen.

The universe is 13.8 billion years old.

The universe is cooling off.

The universe is expanding.

2 Which evidence supports the idea that Cosmic Microwave Background radiation is a remnant of the Big Bang?(1 point)

Its temperature is uniform.

Its mass fluctuates greatly.

Its temperature fluctuates greatly.

Its mass is uniform.

3 Which of these items provide evidence supporting the Big Bang theory? Select the two correct items.(1 point)

rate of star formation

composition of matter in the universe

sizes and shapes of distant galaxies

cosmic background radiation

4 How does the change in the temperature of the universe provide evidence for universe expansion that supports the Big Bang Theory?(1 point)

The universe is warming which, according to the Big Bang Theory, is expected to happen as the cosmos disperses.

The universe is warming which, according to the Big Bang Theory, is expected to happen as the cosmos accumulates.

The universe is cooling which, according to the Big Bang Theory, is expected to happen as the cosmos accumulates.

The universe is cooling which, according to the Big Bang Theory, is expected to happen as the cosmos disperses.

5 How does weak background radiation coming from every direction in the sky support the Big Bang Theory?(1 point)

It provides evidence of the universe's increasing mass.

It provides evidence of universe expansion.

It provides evidence of universe contraction.

It provides evidence of the universe's decreasing mass.

6 Which statements describe ways that nuclear fission is different than nuclear fusion? Select the two correct answers.(1 point)

Nuclear fission is used to produce electricity at nuclear power plants.

Nuclear fission involves one large atom splitting into two smaller atoms.

Nuclear fission takes place in the nucleus of an atom.

Nuclear fission releases a huge amount of energy.

7 Blueshift is observed when(1 point)

a distant luminous object travels rapidly away from an observer.

a distant luminous object travels rapidly towards an observer.

a luminous object travels alongside an observer.

a luminous object is stationary compared to an observer.

8 Which statements about nuclear fusion are false? Select the two correct answers.(1 point)

The fuel for nuclear fusion is often uranium.

Nuclear fusion is used to generate electricity at nuclear power plants.

Nuclear fusion releases large amounts of energy.

Nuclear fusion takes place in the cores of stars.

9 Which of the following statements provide evidence to support the big bang theory? Select the two correct answers.

The ratios of hydrogen and helium in the universe match those of the early universe.

The universe began as a very high density singularity.

Dark matter makes up the majority of matter in the galaxy.

Small spiral galaxies become larger elliptical galaxies when they collide.

10 Which represents a correct match between ideas related to the formation of the universe? Select the two correct answers.(1 point)

accelerating expansion — dark energy

structures forming in the early universe — dark matter

greatest percent of mass of universe — dark matter

glowing nebulae — dark energy

11 How is dark energy related to the theory of the Big Bang?(1 point)

It causes the expansion of the universe to accelerate.

It causes the universe to expand.

It seeded the formation of galaxies and star clusters.

It causes the spinning of galaxies.