Why the Big Bang Definitely Happened

What was the initial reaction to the Big Bang Theory when it was first proposed?

• It was widely accepted by both scientists and religious groups.

• It was met with skepticism and considered controversial.

• It was immediately proven with strong evidence.

• It was ignored by the scientific community.

What does the redshift of light from distant galaxies indicate?

• Galaxies are moving closer to us.

• The universe is expanding.

• Galaxies are stationary.

• The universe is contracting.

What is the significance of the cosmic microwave background (CMB)?

• It shows that the universe is cooling down.

• It proves the universe is static.

• It provides evidence for a universe that was once smaller, hotter, and denser.

• It indicates that galaxies are evenly distributed.

What is the term for the sound wave ripples seen in the CMB?

• Gravitational waves

• Baryon acoustic oscillations

• Electromagnetic waves

• Quantum fluctuations

What does the Big Bang Theory predict about the early universe's composition?

• It was composed mostly of heavy elements.

• It was a mix of gases and liquids.

• It was a plasma of protons and electrons.

• It was entirely made of dark matter.

What process occurred during the first few seconds of the universe that involved nuclear fusion?

• Stellar nucleosynthesis

• Primordial nucleosynthesis

• Galactic formation

• Cosmic inflation

Why can't we test our understanding of physics before 10^-32 seconds after the Big Bang?

• There is no interest in studying that period.

• The energies required to test those conditions are beyond our current capabilities.

• The universe was too cold to study.

• We lack the technology to observe that far back.