Define fractional distillation
a technique used to separate mixture of gases in a crude oil
What are organic compounds?
are compounds which contain carbon atoms joined to hydrogen and somethimes other atoms.
Why is crude oil called a fossil fuel?
because it is made from marine plants and animals
Name three greenhouse gases
carbon dioxide, methane and vapor
What is global warming?
the gradual increase in the Earth's atmosphere caused by high levels of greenhouse gases
