Which is evidence of universe expansion that supports the Big Bang Theory
The temperature of the universe has cooled over time.
The temperature of the universe has cooled and warmed repeatedly over time.
The temperature of the universe has warmed over time.
The temperature of the universe is the same as it was at the time of the big bang
The correct answer is: 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. This observation is consistent with the idea that the universe has been expanding since its initial extremely hot and dense state during the Big Bang.
The evidence of universe expansion that supports the Big Bang Theory is that the temperature of the universe has cooled over time.
To understand how this supports the Big Bang Theory, we need to delve into the background. The Big Bang Theory states that the universe originated from an extremely hot and dense state, often referred to as the initial singularity. From this extremely energetic state, the universe began to expand and cool down.
One of the predictions of the Big Bang Theory is that as the universe expands, the temperature should decrease. This is because as the universe expands, the energy and radiation within it get spread out over larger distances, leading to a dilution of the heat.
To gather evidence for this, scientists have measured the cosmic microwave background radiation (CMB), which is the afterglow of the Big Bang that permeates throughout the universe. The CMB is a faint radiation that is spread evenly across the sky with a relatively uniform temperature. The temperature of this radiation has been measured, and it has been found that this radiation is at a temperature of only a few degrees above absolute zero (-273.15 degrees Celsius or -459.67 degrees Fahrenheit).
This observation aligns with the prediction of the Big Bang Theory, where the initial, extremely high temperatures have cooled down significantly over the course of billions of years. So, the fact that the temperature of the universe has cooled over time serves as evidence in support of the Big Bang Theory.