Which provides evidence of universe expansion that supports the Big Bang Theory? Select the three correct answers.(2 points)
Responses
The temperature of the universe is increasing.
The temperature of the universe is increasing.
An enormous amount of weak cosmic background radiation has been detected in the universe.
An enormous amount of weak cosmic background radiation has been detected in the universe.
Galaxies are moving away from each other.
Galaxies are moving away from each other.
The temperature of the universe is decreasing.
The temperature of the universe is decreasing.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another.
The universe is undergoing a cycle of contraction and expansion.
An enormous amount of weak cosmic background radiation has been detected in the universe.
Galaxies are moving away from each other.
The temperature of Cosmic Microwave Background radiation varies widely from one part of the universe to another.
The three correct answers that provide evidence of universe expansion supporting the Big Bang Theory are:
1. An enormous amount of weak cosmic background radiation has been detected in the universe. This is known as the Cosmic Microwave Background (CMB) radiation, which is considered a remnant of the initial explosion of the Big Bang. Its discovery in 1965 by Arno Penzias and Robert Wilson confirmed a key prediction of the Big Bang Theory.
2. Galaxies are moving away from each other. The observation that galaxies in the universe are moving away from each other, as evidenced by the redshift of their light spectra, supports the idea of an expanding universe. This observation aligns with the concept that the universe started from a singular point in the past, as suggested by the Big Bang Theory.
3. The temperature of the universe is decreasing. According to the Big Bang Theory, as the universe expands, its temperature should decrease. This prediction is consistent with the observation that the average temperature of the universe is indeed cooling down over time. This is also supported by the detection of the CMB radiation, which has a temperature of only a few degrees above absolute zero.
The three correct answers that provide evidence of universe expansion supporting the Big Bang Theory are:
1. An enormous amount of weak cosmic background radiation has been detected in the universe.
Explanation: One of the key pieces of evidence for the Big Bang Theory is the discovery of cosmic microwave background radiation (CMB). This radiation is a remnant of the early universe, which was extremely hot and dense. As the universe expanded and cooled down, the radiation became stretched and now appears as a faint background radiation throughout space.
2. Galaxies are moving away from each other.
Explanation: Scientists have observed that galaxies in our universe are moving away from each other. This phenomenon, known as the redshift, indicates that the universe is expanding. The further away a galaxy is, the faster it appears to be moving away. This observation aligns with the predictions of the Big Bang Theory, where the universe originated from a singular, dense point and has been expanding ever since.
3. The temperature of the universe is decreasing.
Explanation: The temperature of the universe is decreasing as it expands. This cooling down of the universe is consistent with the predictions of the Big Bang Theory, where the initial explosion resulted in a hot and dense universe, which has been gradually cooling down as it expands.
Therefore, the three correct answers are:
- An enormous amount of weak cosmic background radiation has been detected in the universe.
- Galaxies are moving away from each other.
- The temperature of the universe is decreasing.