Which is evidence of universe expansion that supports the Big Bang Theory?(1 point)
Responses
The temperature of the universe has cooled and warmed repeatedly over time.
The temperature of the universe has cooled and warmed repeatedly over time.
The temperature of the universe is the same as it was at the time of the Big Bang.
The temperature of the universe is the same as it was at the time of the Big Bang.
The temperature of the universe has cooled over time.
The temperature of the universe has cooled over time.
The temperature of the universe has warmed over time.
The temperature of the universe has cooled over time.
The evidence of universe expansion that supports the Big Bang Theory is that the temperature of the universe has cooled over time.
The correct answer is: The temperature of the universe has cooled over time.
To understand why this is evidence for the Big Bang Theory, we need to look at the concept of cosmic microwave background radiation. According to the Big Bang Theory, the universe originated from an incredibly hot and dense state about 13.8 billion years ago. As the universe expanded, it also cooled down.
The evidence for this cooling can be seen in the cosmic microwave background radiation (CMBR) that permeates the universe. CMBR is a faint radiation left over from the early stages of the universe's formation, specifically from about 380,000 years after the Big Bang. It is often referred to as the "afterglow" of the Big Bang.
Measurements of the CMBR show that it has a nearly uniform temperature of around 2.7 Kelvin throughout the observable universe. This indicates that the universe has indeed gone through a process of cooling over time.
Therefore, the fact that the temperature of the universe has cooled over time is consistent with the predictions of the Big Bang Theory, providing evidence for its validity.