fossil fuels -APEX
"Fossil Fuels" are natural fuels such as petroleum, gas, and coal and are used to generate energy. They are hydrocarbon deposits which are created from living organisms. Fossil Fuels are formed over thousands of years from the remains of ancient plants and animals. They also have a high hydrogen and carbon content and are preserved in rocks in the earth's crust. Coal mainly consists of carbon, while petroleum consists mainly of hydrogens. Natural gas is a fossil fuel in a gaseous state.
if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.
what is a measurement of the earth’s history divided into time periods?
> fossil record <
> geologic time scale <