Which provides evidence of universe expansion that supports the the Big Bang Theory? select three corrcet ansewers
1) Redshift of distant galaxies: The observation of redshift in the light emitted by distant galaxies suggests that the universe is expanding. This is consistent with the Big Bang Theory, which proposes that the universe had a singular starting point and has been expanding ever since.
2) Cosmic Microwave Background Radiation (CMB): The detection of CMB radiation, which is a faint glow present throughout the universe, provides strong evidence for the Big Bang Theory. This radiation is considered to be the afterglow of the early stages of the universe, when it was incredibly hot and dense.
3) Abundance of light elements: The observed abundances of light elements in the universe, such as hydrogen and helium, are consistent with the predictions of the Big Bang Theory. These elements were formed during the early stages of the universe, shortly after the Big Bang, and their observed abundances provide further support for this theory.
There are several lines of evidence that support the Big Bang Theory and the expansion of the universe. Here are three correct answers:
1. Redshift of galaxies: Edwin Hubble observed that distant galaxies appear to be moving away from us, and this is evident from the redshift of their light. The redshift indicates that the galaxies are moving away from us at speeds proportional to their distance. This observation is consistent with the expanding universe predicted by the Big Bang Theory.
2. Cosmic microwave background radiation (CMB): The discovery of the CMB is considered one of the strongest pieces of evidence for the Big Bang Theory. The CMB is residual radiation from the early stages of the universe, and its discovery in 1964 by Arno Penzias and Robert Wilson provided strong support for the idea that the universe had a hot, dense beginning.
3. Abundance of light elements: The Big Bang Theory predicts the formation of light elements such as hydrogen and helium in the early universe. Observations of the abundances of these elements in the universe are in agreement with the predictions of the theory. The ratio of hydrogen to helium observed in stars and in the cosmic abundance of elements strongly supports the idea of a hot, dense beginning of the universe.
To find three pieces of evidence that support the Big Bang Theory and the expansion of the universe, you can refer to the following:
1. Cosmic Microwave Background Radiation: One of the most significant pieces of evidence is the detection of cosmic microwave background radiation (CMB). In the 1960s, Arno Penzias and Robert Wilson discovered a low-level, uniform microwave radiation coming from space. This radiation is a remnant of the early stages of the universe, about 380,000 years after the Big Bang. The detection of CMB provides strong support for the theory of cosmic expansion.
2. Redshift of Galaxies: Another piece of evidence for the expansion of the universe is the observation of redshift in the light coming from distant galaxies. When an object moves away from an observer, the light waves it emits get stretched, causing a shift towards longer wavelengths (redshift). Astronomers have found that the light from distant galaxies shows a consistent redshift, indicating that they are moving away from us and each other. This observation supports the idea that the universe is expanding.
3. Hubble's Law: Edwin Hubble's observations in the 1920s led to the development of Hubble's Law, which states that the velocity at which a galaxy is moving away from us is directly proportional to its distance from us. This relationship implies that all galaxies are moving apart from each other, providing evidence for the expansion of the universe. Hubble's Law supports the Big Bang Theory by showing that the universe is not static but in a state of continuous expansion.
By understanding these three pieces of evidence – the cosmic microwave background radiation, redshift of galaxies, and Hubble's Law – you can confidently conclude that they support the Big Bang Theory and the concept of an expanding universe.