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Petroleum

en.wikipedia.org/wiki/Petroleum

Petroleum is a naturally occurring, yellow-to-black liquid found in geological formations beneath the Earth's surface, which is commonly refined into various ...

Petroleum | Information on Petroleum and Crude Oil

www.petroleum.co.uk/

Petroleum or crude oil is a fossil fuel. Find out how petroleum was formed and a history of its development into the oil products we see today.

What Is Petroleum? - AAPG Home

www.aapg.org/about/petroleum-geology/petroleum-through-time/what-is-petroleum

There are some places on earth where oil is not trapped underground, but actually seeps out at the earth's surface—Think Jed Clampett and a "bubbling crude!

Petroleum & Other Liquids - U.S. Energy Information Administration ...

www.eia.gov/petroleum/

Wholesale spot petroleum prices, 5/26/2016 close. Product, Area, Price, % change*. Crude Oil ($/barrel), WTI, 49.00, -0.2. Brent, 49.52, +1.3. Louisiana Light  ...

Petroleum | Define Petroleum at Dictionary.com

www.dictionary.com/browse/petroleum

Petroleum definition, an oily, thick, flammable, usually dark-colored liquid that is a form of bitumen or a mixture of various hydrocarbons, occurring naturally in ...

Petroleum Economist

www.petroleum-economist.com/

Publishing an energy and power journal, a portfolio of global and regional maps, and a series of books and reports. Residential and in-house training courses.

API

www.api.org/

The American Petroleum Institute (API) is the only national trade association that represents all aspects of America's oil and natural gas industry. Our more than ...

Energy Intelligence Group | information services - Petroleum ...

www.energyintel.com/pages/about_piw.aspx

Petroleum Intelligence Weekly (PIW) has been setting the standard for international energy journalism for five decades. PIW's mission is to provide the analytical ...

petroleum | Britannica.com

www.britannica.com/science/petroleum

Petroleum, complex mixture of hydrocarbons that occur in the Earth in liquid, gaseous, or solid forms. The term is often restricted to the liquid form, commonly ...

Petroleum | Definition of Petroleum by Merriam-Webster

www.merriam-webster.com/dictionary/petroleum

a kind of oil that comes from below the ground and that is the source of gasoline and other products. Source: Merriam-Webster's Learner's Dictionary.

Answers
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.