Question

1. according to the, all the matter and energy in the universe was once condensed into a single, incredibly dense point, which then exploded and began to expand in all directions.

a. steady state theory
b. big bang theory
c. cosmology
d. hubbles law

1. explain how the universe formed and give 1 piece of evidence that supports the big bang theory.

Explanation:

• Question 1:
• The steady - state theory posits that the universe has no beginning or end and maintains a constant average density.
• Cosmology is the study of the origin, evolution, and large - scale structure of the universe, not a specific theory about its origin.
• Hubble's Law relates the recessional velocity of galaxies to their distance from us.
• The Big Bang theory states that all matter and energy in the universe was once condensed into a single, incredibly dense point (a singularity), which then exploded and began to expand.
• Question 2:
• According to the Big Bang Theory, the universe formed from a singularity. At \(t = 0\) (the Big Bang), the universe had infinite density and temperature. As it expanded, it cooled. In the first few minutes, light - elements like hydrogen and helium were formed. Over time, stars and galaxies formed from the gravitational aggregation of matter.
• One piece of evidence for the Big Bang Theory is the cosmic microwave background (CMB) radiation. It is a faint glow of light that fills the universe and is the remnant heat from the Big Bang. It has a nearly uniform temperature (\(T\approx2.725\) K) across the sky, which is consistent with the idea that the early universe was in a hot, dense, and nearly uniform state.

Answer:

1. B. big bang theory
2. The universe formed from a singularity. At the Big Bang (\(t = 0\)), the universe was hot and dense. It expanded and cooled. Light - elements formed in the first few minutes, and later stars and galaxies formed. Evidence: Cosmic microwave background (CMB) radiation, a remnant heat from the Big Bang with \(T\approx2.725\) K.