What does the evidence supporting the Big Bang theory assume about the universe when it began? select two correct answers
1) The evidence assumes that the universe was in a state of extreme density and temperature at the beginning.
2) The evidence assumes that the universe was expanding and continues to expand.
To answer this question, we need to understand the Big Bang theory and the evidence supporting it. The Big Bang theory is the prevailing cosmological model that explains the origin and evolution of the universe.
According to the Big Bang theory, the universe began as a singularity – an infinitely dense and hot point – approximately 13.8 billion years ago. The theory is supported by several lines of evidence, including:
1. Cosmic Microwave Background Radiation (CMB): The CMB is a faint radiation that permeates the entire universe. It is considered as the afterglow of the Big Bang. The evidence from the CMB supports the assumption that the early universe was incredibly hot and dense at its beginning.
2. Hubble's Law and the Observable Expansion of the Universe: Astronomer Edwin Hubble observed that distant galaxies are moving away from Earth, and the farther they are, the faster they're moving away. This observation implies that the universe is expanding. Extrapolating this backwards leads to the assumption that the universe must have started from a single point, supporting the Big Bang theory.
Therefore, the evidence supporting the Big Bang theory assumes the following about the universe when it began:
1. The universe was incredibly hot and dense.
2. The universe started from a singularity or a single point.
So, the correct answers are:
- The universe was incredibly hot and dense.
- The universe started from a singularity or a single point.
The evidence supporting the Big Bang theory assumes the following about the universe when it began:
1. The universe was much hotter and denser than it is today.
2. The universe was expanding and continues to expand.