Hydrocarbons are compounds that contain only hydrogen and carbon. There are many different types of hydrocarbons, one type are alkanes and another type are Alkenes. Crude oil is made up of different hydrocarbons. These are good fuels as they burn very easily. Image:Fish1.gif This article is a , and is very fishy. You can help My English Wiki by expanding it, removing the non-GCSE content or improving it.