describing the universe during the big bang\n\nwhich statements describe some of the original ideas proposed…

describing the universe during the big bang\n\nwhich statements describe some of the original ideas proposed about the universe during the big bang? check all that apply.\n\n- the universe exploded.\n- the universe was opaque.\n- the universe was one second old.\n- the universe was very hot and dense.\n- the universe expanded from a single point.

describing the universe during the big bang\n\nwhich statements describe some of the original ideas proposed about the universe during the big bang? check all that apply.\n\n- the universe exploded.\n- the universe was opaque.\n- the universe was one second old.\n- the universe was very hot and dense.\n- the universe expanded from a single point.

Answer

Brief Explanations:

The Big Bang theory describes the early development of the universe based on several core concepts:

  1. The universe exploded: While often called an "explosion" in layman's terms, the original and fundamental idea is a rapid expansion of space itself.
  2. The universe was very hot and dense: According to the theory, the universe began in a state of extremely high temperature and density.
  3. The universe expanded from a single point: The theory posits that the observable universe originated from a gravitational singularity, a point of infinite density.
  4. The universe was opaque: In its earliest stages, the universe was a hot plasma of ionized matter that was opaque to radiation; it became transparent only after recombination (about 380,000 years later).
  5. The universe was one second old: This refers to a specific epoch (the Lepton epoch) within the Big Bang timeline, though the theory covers the universe from time $t = 0$.

Answer:

The universe exploded. The universe was opaque. The universe was one second old. The universe was very hot and dense. The universe expanded from a single point.