How does the big bang theory account for the formation of the universe?

There's too much to explain, just follow the link or google it:

http://en.wikipedia.org/wiki/Big_Bang

Basically the Universe started out as a singularity of extreme heat and density and then rapidly expanded and became cooler and less dense.

Why is this in the geology section?

A scientific theory is a unifying concept that explains a large body of data. It is a hypothesis that has withstood the test of time and the challenge of opposing views. The Big Bang Theory is our best understanding of how the universe formed.

Six prominent facts supporting the Big Bang Theory are:

** The red shift of almost all galaxies, getting greater as their distance increases.

— This shows that the galaxies are flying away from each other, at greater speeds at greater distances.

** The cosmic microwave background radiation.

— This is a remnant of the radiation from the Big Bang, and has cooled over time to the exact temperature predicted.

** The variations in the cosmic microwave background radiation.

— These variations fit theoretical predictions, and were caused by quantum differences near the start of Big Bang.

** The proportions of the lightest elements and isotopes.

— This helps show that the calculations for nuclear interactions immediately following the Big Bang are correct.

** The changes in galaxies as we look further away (and thus back in time), with distant galaxies more primitive and having fewer heavy elements.

— This shows some of the changes in the universe since the Big Bang, and confirms the deep time of the universe.

** The change in the apparent speed of type 1a supernova as we look back in time, with distant supernova exploding more slowly.

— This shows that the light has been stretched out by the expansion of space over billions of years.

For more, watch the video at the 1st link - "A Universe From Nothing" by theoretical physicist Lawrence Krauss, read an interview with him (at the 2nd link), get his new book (at the 3rd link), or read an excerpt from his book (at the 4th link).

People can make answers. But not reason. (This is your so called freewill.)

God can make reason. But not answer. (This is your so called fate and chance.)