What Is Crude Oil Made of?

Answer

Crude oil is called a fossil fuel because it is made of the decaying material of formerly living things. The way it happens is all the dead stuff that you see on the floor of the forest or on the bottom of swaps builds up after millions and millions of years. This get buried and is put under great pressure for million and millions of years again. Eventually, it turn to oil.
1 Additional Answer
Ask.com Answer for: what is crude oil made of
Petroleum, or crude oil, is a smelly, yellow-to-black liquid and is usually found in underground areas called reservoirs.
Oil was formed from the remains of animals and plants (diatoms) that lived millions of years ago in a marine (water) environment before the dinosaurs.
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