Which is evidence of universe expansion that supports the Big Bang Theory?(1 point)
Responses
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 warmed over time.
The temperature of the universe has warmed over time.
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 has cooled over time.
The temperature of the universe has cooled over time. This supports the Big Bang Theory as it suggests that the universe has been expanding and cooling since its initial hot and dense state during the Big Bang.
The correct response is: The temperature of the universe has cooled over time.
One piece of evidence supporting the Big Bang Theory is the observation that the temperature of the universe has cooled over time. This observation is based on the measurement of the Cosmic Microwave Background (CMB) radiation, which is the faint remnant of the thermal radiation that filled the early universe. The CMB was discovered in 1965 by Arno Penzias and Robert Wilson, and its properties support the Big Bang Theory.
To understand why the cooling temperature of the universe is evidence for the Big Bang Theory, we can look at the concept of cosmic expansion. According to the theory, the universe began as a hot and dense state around 13.8 billion years ago. As the universe expanded, it also cooled down. This process is known as cosmic cooling.
The cooling of the universe can be explained by the expansion of space itself. As space expands, the wavelengths of the photons in the universe also expand, causing them to lose energy and cool down. This is similar to the concept of redshift, where the wavelengths of light from distant objects are stretched towards the longer wavelength, or "red," end of the electromagnetic spectrum.
By measuring the temperature of the CMB radiation, scientists can determine the rate of cosmic cooling. Observations have shown that the CMB radiation has a temperature of approximately 2.7 Kelvin, which is very cold compared to the initial temperature of the universe at the time of the Big Bang.
Therefore, the cooling of the universe over time, as indicated by the temperature of the CMB radiation, is strong evidence in support of the Big Bang Theory.