Question

How was petroleum formed?
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Answer 1

Explanation:

Like coal and natural gas, petroleum was formed from the remains of ancient marine organisms, such as plants, algae, and bacteria. ... Over millions of years under high pressure and high temperature, the remains of these organisms transformed into what we know today as fossil fuels.

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Answer 2

Petroleum

• Petroleum is a fossil fuel, meaning that it has been created by the decomposition of organic matter over millions of years.
• Petroleum is formed when large quantities of dead organisms–primarily zooplankton and algae–underneath sedimentary rock are subjected to intense heat and pressure