Question

over time, the temperature of the universe ________.

• 1 point

○ increased and got warmer
○ decreased and got cooler

how old do scientists believe that the universe is according to the big bang theory?

• 1 point

○ 4.6 billion years old
○ 13.8 billion years old
○ 8 billion years old
○ 9.4 billion years old

Explanation:

First Question:

According to cosmological theories (Big Bang), as the universe expands, its temperature decreases (cooler) over time. So the correct option is the one stating "Decreased and got cooler".

The Big Bang Theory estimates the universe's age to be about 13.8 billion years old. 4.6 billion is Earth's age, others are incorrect.

Answer:

B. Decreased and got cooler (assuming the options are labeled A and B as first: A. Increased and got warmer, B. Decreased and got cooler)

Second Question: