Big bang theory. Big bang theory. Big bang theory.?

That's not what happened. The big bang was an expansion, not an explosion. It was not made up of 'two particles'. It was a singularity, mostly energy. We don't know where it came from - the big bang stared our universe, so whatever caused it happened outside our universe, and we can't see outside our universe. We have some ideas, but unless it happens again we might never know for sure.

No matter cannot be created from nothing, it must be created from something.

The current theory goes, the universe is expanding due to the big bang, but slowing down. Eventually it will stop expanding and the gravity of the matter will cause it to gather together. The univers will contract and eventually all the matter in the universe will all be attracted by gravity back to the same spot.

This is the big crunch.

Then after this big crunch the mass and density of all the matter in the universe crushing in on top of each other will cause another big bang.

Many scientists believe this cycle may have happened many times, this may not be the first ever universe and probably wont be the last.

The big bang DID NOT start from completely nothing according to scientists. Rather it was just a sea of endless particles in a space that probably didn't share the same laws and properties of physics that we have. The long mathmatical answer can be found on the web somewhere and if your interested look it up. According to string-membrane theory we are just one of many universes in a sea of endless particles. A good analogy would be an lots of enclosed goldfish bowls around a very messy room. these bowls would represent the many universes.

There are a lot of ideas about what caused the big bang. Most cosmologists and astronomers just agree that it happened, not what caused it to happen. Scientists cannot make matter from nothing, and the idea that nothing can come from nothing has actually led some scientists to reject the big bang because of the theological implications. (If nothing can come from nothing, then something or someone must have caused the big bang.) Whereas if the universe had no beginning, then it needs no beginner.

It's now called the big bounce theory. The theory goes that the universe started from a particle that they think to be the size of an atom (nobody knows for sure) and it exploded (I cant remember why) and the universe started to grow and eventually it got so big that is started to shrink back to that particle and it goes on forever and ever. But that question does bring science to a religion. What created the big bounce? I do believe in science but I also believe that god created the big bounce.

No,that's why God is real.It makes so much more sense that everything was created within 7 days by an eternal and complex being rather than nothing into matter and then from matter came evolution,which is about simple things becoming more complex over time when our whole lives are based upon existence and down hill from there.How can decrease come out of a system of complexity?

You lack the basic knowledge required to grasp the answer.Take a basic astronomy course.It should at least cover the basics of cosmology.

This will require an open mind.If you lack that you'll never gain true knowledge.

You aren't knowledgeable enough to understand the answer. Wait until you get to college and then take a course in cosmology.

Nobody know about that.