Question

lesson 3 : evidence for the big bang theory
why does each piece of evidence provide evidence for the big bang theory?
red shift
cosmi microwave
background
radiation
relative abundance
of elements in the
universe
lc - 2 review:

1. which process occurs within the core of stars to produce heat and light?

Explanation:

• Red Shift: When an object moves away from an observer, the light it emits is stretched, causing a shift towards the red end of the spectrum. This shows that galaxies are moving away from each other, indicating an expanding universe, which is a key aspect of the Big Bang Theory.
• Cosmic Microwave Background Radiation: This is the afterglow of the Big Bang. It is a faint glow of light that fills the universe and is consistent with the predictions of the Big Bang Theory about the early, hot universe cooling over time.
• Relative Abundance of Elements in the Universe: The Big Bang Theory predicts the relative amounts of light elements (like hydrogen and helium) that should have been formed in the early universe. Observations of the universe's elemental composition match these predictions.

Answer:

• Red Shift: Shows galaxies moving apart (expanding universe, a Big - Bang prediction).
• Cosmic Microwave Background Radiation: Afterglow of the Big Bang (matches early - universe cooling predictions).
• Relative Abundance of Elements in the Universe: Element ratios match Big - Bang predictions of early - universe nucleosynthesis.