phy sci

this speculate idea suggests that our universe is just one of many universes that exist in a "multiverse".

• steady state theory

• inflation theory

• multiverse theory

• big bang theory

proposed as an extension of the big bang theory, it suggests that the universe underwent an extremely rapid expansion in the first moments after the big bang.

• steady state theory

• inflation theory

• multiverse theory

• big bang theory

In the early 20th century, scientists and astronomers realized that the universe was not static but was?

• expanding

• stretching

• closing

• shrinking

who proposed a model which the universe originated from a "primeval atom".

• Georges Lemaitre

• Robert Wilson

• Arno Penzias

• Edwin Hubble

during the _____, the temperature around the big bang was about 5.5 billion degrees celsius.

• eight seconds

• three seconds

• first second

• five seconds

the initial explosion contained all the necessary subatomic particles for atoms and molecules: neutrons, protons, and electrons.

• first second

• three seconds

• five seconds

• two seconds

They accidentally discovered the cosmic microwave background radiation.

• Robert Herman

• Georges Lemaitre

• Robert Wilson

• Arno Penzias

registered a signal in their radio telescope that could not be attributed to any precise source in the sky.

• cosmic microwave background

• cosmic oven background

• cosmic inflation background

• cosmic radiation background

A relationship between the distances of galaxies and their red shifts.

• Alpher's law

• Gamow's law

• Herman's law

• Hubble's law

named for the dominance of radiation

• emission era

• radiation era

• broadcast era

• diffraction era