The Beginning of Everything -- The Big Bang

How was the universe generally perceived by most scientists up to the middle of the 20th century?

• As constantly expanding and contracting.

• As infinite and ageless.

• As having a definite beginning and end.

• As a static, unchanging entity.

Which of the following discoveries provided significant observational evidence that led to the Big Bang becoming the accepted theory in science?

• The theory of relativity and the discovery of black holes.

• The expansion of galaxies and cosmic background radiation.

• The existence of dark matter and dark energy.

• The formation of the first stars and planets.

The Big Bang theory suggests that the universe began as a (a)   , extremely hot and dense point.

About (a)   billion years ago, the universe began expanding rapidly from that tiny, dense state.

As the universe cooled, particles combined to form the simplest atoms: (a)   and helium.

Over time, gravity pulled matter together to form (a)   , galaxies, and eventually planets.

What is the Big Bang described as?

• A massive explosion from a single point.

• The sudden appearance of matter from nothing.

• All space stretching everywhere at once.

• A collision of multiple universes.

What was the outcome of the interaction between matter and antimatter in the early universe?

• Equal amounts of matter and antimatter were formed.

• Antimatter completely annihilated all matter.

• Matter won over antimatter, leaving almost all matter and nearly no antimatter.

• They combined to form a new type of energy.

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Why was a period in the early universe referred to as the "Dark Age"?

• Because the universe was filled with dark matter.

• Because there were no stars and hydrogen gas blocked visible light.

• Because the temperature was too low for any light to exist.

• Because all light was absorbed by black holes.