Mass Movement (Soil Creep)

Soil creep is soil moving down a hill very slowly, usually less than an inch a year, because the ground is freezing, and then thawing out. When it freezes the ground is pushed upward and when it thaws it drops down a little lower on the slope than it was. Soil creep can move fences and things like that a little bit. 

Fossil fuels

I think we shouldn't use fossil fuels They are getting used up quickly, because they take millions of years to make themselves and we are using them up in only decades. It is not good to use them, for this reason, because we will have no significant energy source after it all runs out. They are also bad for the environment. When we use them they make a lot of pollution and stink up the air and everything else. Fossil fuels are also making global warming when we burn them. Also, companies that dig them up are really big and too powerful and don't want anyone else getting in control of selling energy. Fossil fuels are our primary source of energy, but it's a really good thing that people are starting to use things like wind power and solar power because fossil fuels are not reliable and are bad for us and the environment.

Coal

Coal is mostly made of carbon and hydrogen, but can also be made of oxygen, nitrogen, and sulfur.

It's made by a process that takes hundreds of millions of years. Coal originally comes from plants 300 million years old. The plants died and were covered with soil and water, which then got heated and compressed into coal.