The Big Bang Theory Quiz

Big Bang Theory Overview

• Describes the origin of the universe as a massive expansion from an extremely hot and dense state.
• It suggests the universe has been expanding since its inception.

Evidence Supporting the Big Bang Theory

• Cosmic Microwave Background Radiation (CMBR) serves as a primary evidence, representing thermal radiation from the early universe.

Cosmic Microwave Background (CMB)

• CMB is the leftover radiation from the hot early universe, now cooled and uniformly spread throughout space.
• It provides insights into the conditions shortly after the Big Bang.

Recombination Process

• Recombination occurred when the universe cooled enough for protons and electrons to combine and form neutral hydrogen atoms.
• This process marked the transition from an opaque universe to a transparent one, allowing photons to travel freely.

Hydrogen to Helium Mass Ratio

• The H to He mass ratio in stars and interstellar matter is approximately 3 to 1, indicative of the primordial composition from the Big Bang.

True/False Statements

• False: The Big Bang was not an explosion; it did not carry matter outward from a specific point but involved the expansion of space itself.
• True: Red shifts of distant galaxies indicate that the universe is expanding, showing that galaxies are moving away from us.
• True: The cosmic microwave background represents energy left as a result of the recombination process during the Big Bang.
• True: Atoms became neutral due to the binding of nuclei and electrons during the Big Bang, leading to the formation of neutral matter.
• True: The mass ratio of hydrogen to helium in stars and interstellar matter is 3 to 1.