What type of evidence does cosmic background radiation provide about the origins of the universe?(1 point) Responses It pinpoints the size of the original universe. It pinpoints the size of the original universe. It proves that the universe is expanding. It proves that the universe is expanding. It supports predictions of the composition of the early universe. It supports predictions of the composition of the early universe. It verifies that the early universe was once extremely hot.
All three statements are supported by cosmic background radiation evidence.
1. It pinpoints the size of the original universe: Cosmic background radiation is considered the afterglow of the Big Bang and is present uniformly in all directions. The observed temperature and the distribution of this radiation provide valuable information about the size of the early universe.
2. It proves that the universe is expanding: The discovery of cosmic background radiation in 1965 by Arno Penzias and Robert Wilson provided strong evidence for the Big Bang theory. The observed redshift of the radiation indicates that the universe is expanding, consistent with the theory.
3. It supports predictions of the composition of the early universe: The measured properties of cosmic background radiation, such as its temperature and spectrum, match the predictions made by the Big Bang theory regarding the composition of the early universe. The radiation's uniformity and isotropy provide further support for these predictions.
Additionally, cosmic background radiation is also considered a form of evidence that verifies that the early universe was once extremely hot. The observed radiation is at a temperature of about 2.7 Kelvin, which is significantly cooler than the initial extremely high temperatures of the early universe. This cooling and the subsequent discovery of the radiation support the hypothesis that the early universe was indeed hot and underwent expansion.
The cosmic background radiation provides several pieces of evidence about the origins of the universe:
1. It pinpoints the size of the original universe.
2. It proves that the universe is expanding.
3. It supports predictions of the composition of the early universe.
4. It verifies that the early universe was once extremely hot.
So, the correct answer would be:
The cosmic background radiation provides evidence in the form of pinpointing the size of the original universe, proving that the universe is expanding, supporting predictions of the composition of the early universe, and verifying that the early universe was once extremely hot.
The cosmic background radiation provides several pieces of evidence about the origins of the universe. Here are three key points regarding the evidence it provides:
1. It supports predictions of the composition of the early universe: The cosmic background radiation is often referred to as the "afterglow" of the Big Bang. It is a faint radiation that permeates the entire universe and is detectable from all directions. The composition of this radiation matches the predictions made by the Big Bang theory regarding the elements that were present in the early universe, such as hydrogen and helium. This agreement supports the idea that the Big Bang theory is a valid explanation for the origins of the universe.
2. It verifies that the early universe was once extremely hot: The cosmic background radiation is observed to have a relatively uniform temperature of around 2.7 Kelvin. This uniformity indicates that at one point in time, the entire universe was in a state of extreme heat. The uniformity also suggests that the early universe was very homogeneous on large scales, which aligns with the predictions of the Big Bang theory.
3. It proves that the universe is expanding: The cosmic background radiation provides evidence for the expansion of the universe. The observed radiation is redshifted, meaning that the wavelengths of the radiation have been stretched as the universe expanded over time. This redshift is a direct consequence of the expansion of space itself. The presence of cosmic background radiation with a redshift supports the idea that the universe has been expanding since the Big Bang.
In summary, the cosmic background radiation supports predictions about the composition and temperature of the early universe, as well as provides evidence for the expansion of the universe.