which provides evidence of the universe expansion that supports the big bang theory? select three correct answers
the universe in undergoing a cycle of contradiction and expansion
the temperature is increasing
the temperature is decreasing
galaxies are moving away from one another
the temp of CMB radiation varies widely from one part of the universe to the other
an enormous amount of weak cosmic background radiation has been detected in the universe
The three correct answers are:
1. Galaxies are moving away from one another. This observed phenomenon, known as the Hubble expansion, provides evidence for the expansion of the universe.
2. The temperature is decreasing. The observation that the temperature of the universe is gradually cooling down over time is consistent with the idea that it was once in a highly energetic and hot state during the Big Bang.
3. An enormous amount of weak cosmic background radiation has been detected in the universe. The discovery of the Cosmic Microwave Background (CMB) radiation, which is a remnant from the early stages of the universe, provides further evidence for the Big Bang theory.
The three correct answers that provide evidence of the universe expansion supporting the Big Bang theory are:
1. Galaxies are moving away from one another: The observation that galaxies are consistently moving away from each other in all directions is consistent with the idea that the universe is expanding.
2. The temperature is decreasing: The prediction of the Big Bang theory is that as the universe expands, the temperature should gradually decrease over time. Observations of the cosmic microwave background radiation (CMB) show that it has a relatively uniform temperature, which indicates a cooling trend consistent with the expansion.
3. An enormous amount of weak cosmic background radiation has been detected in the universe: The discovery of the cosmic microwave background radiation (CMB) in the 1960s was a key piece of evidence for the Big Bang theory. This radiation is uniform in all directions and is considered to be leftover radiation from the early stages of the universe's expansion.
Therefore, the correct answers are: Galaxies are moving away from one another, the temperature is decreasing, and an enormous amount of weak cosmic background radiation has been detected in the universe.
Three correct answers that provide evidence of the universe expansion supporting the big bang theory are:
1. Galaxies are moving away from one another: One piece of evidence for the expansion of the universe is the observation that distant galaxies are moving away from us, and the farther away they are, the faster they are moving. This observation supports the idea that the universe is continuously expanding.
2. The temperature is decreasing: Another piece of evidence is the observation of the cosmic microwave background (CMB) radiation. This radiation is leftover thermal energy from the early universe. It has been observed that the CMB radiation is "stretched" or redshifted, which means its wavelengths are getting longer. This redshift indicates that the universe has been continuously expanding since the time of the big bang, and therefore, the temperature has been decreasing over time.
3. An enormous amount of weak cosmic background radiation has been detected in the universe: The discovery of the cosmic microwave background radiation itself is a significant piece of evidence supporting the big bang theory. In 1965, the detection of this radiation by Arno Penzias and Robert Wilson provided strong support for the idea that the universe began in a hot, dense state and has since been expanding.