Viscosity is the term for resistance to flow. Petroleum is a substance with high viscosity, meaning that, like honey, it flows slowly and with difficulty. Crude oil is the term used for petroleum that is pumped from underground. Refined petroleum is a mix of hydrocarbons. Hydrocarbons are molecular compounds that contain only atoms of the elements hydrogen and carbon. Petroleum is mostly used as fuel, but its other uses as a raw material include: being in CDs, sports equipment, clothing, automobile parts, plastic charge cards, and carpeting. Dude, petroleum is pretty cool.
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