Big Bang Theory Flashcards

Flashcards about the Big Bang Theory

What is the Big Bang Theory?

A cosmological model that explains the origin of the universe.

According to the Big Bang Theory, when did the universe start expanding?

Approximately 13.8 billion years ago.

In the bread-raisin model, what do the raisins represent, and are they expanding?

The galaxies are not expanding, but the distances between them increase due to the expansion of the universe.

What is a 'singularity' in the context of the Big Bang Theory?

An area predicted to be in the core of a black hole with very high temperature and density.

What is 'Nucleosynthesis'?

The formation of elements, such as Hydrogen and Helium.

What are the main pieces of evidence supporting the Big Bang Theory?

Expansion of the universe, abundance of light elements, and cosmic microwave background (CMB) radiation.

Who was the first proponent of the Big Bang Theory?

Georges Henri Joseph Edouard Lemaître.

What contribution did Edwin Powell Hubble make to the Big Bang Theory?

He established Hubble's Law, providing evidence that the universe is expanding

What did Arno Penzias and Robert Wilson discover that supports the Big Bang Theory?

They discovered cosmic microwave background radiation.

What is Hubble's Law?

The velocities of distant objects are directly proportional to their distance from Earth.

What are some drawbacks of the Big Bang Theory?

It does not explain the initial creation of the universe or the formation of galaxies.