which statement accurately describes the origin and expansion of the universe?\nas the universe continues to…

which statement accurately describes the origin and expansion of the universe?\nas the universe continues to expand, it gradually gets warmer.\ngalaxies that are farther away are moving away more slowly.\ncosmic background radiation is leftover thermal energy from the big bang.\nstars and galaxies formed almost immediately after the big bang occurred.

which statement accurately describes the origin and expansion of the universe?\nas the universe continues to expand, it gradually gets warmer.\ngalaxies that are farther away are moving away more slowly.\ncosmic background radiation is leftover thermal energy from the big bang.\nstars and galaxies formed almost immediately after the big bang occurred.

Answer

Explanation:

Step1: Analyze the first option

According to the big - bang theory and the properties of the expanding universe, as the universe expands, it cools down, not warms up. So, the statement “As the universe continues to expand, it gradually gets warmer” is incorrect.

Step2: Analyze the second option

Based on Hubble's law (v = H_0d) (where (v) is the recessional velocity of a galaxy, (H_0) is the Hubble constant, and (d) is the distance of the galaxy from us), galaxies that are farther away are moving away faster. So, the statement “Galaxies that are farther away are moving away more slowly” is incorrect.

Step3: Analyze the third option

The cosmic microwave background (CMB) radiation is indeed leftover thermal energy from the early universe (the Big Bang). It was predicted by the Big - Bang theory and discovered in 1965.

Step4: Analyze the fourth option

After the Big Bang, the universe was too hot and dense for stars and galaxies to form immediately. It took hundreds of millions of years for the universe to cool down and for matter to clump together to form stars and galaxies.

Answer:

Cosmic background radiation is leftover thermal energy from the big bang.