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6 Cards in this Set
- Front
- Back
Coal |
Coal is a black sedimentary rock that can be burned for fuel and used to generate electricity. |
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Petroleum |
Petroleum, also known as crude oil, or simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons and is found in geological formations. |
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Natural gas |
Natural gas is a naturally occurring mixture of gaseous hydrocarbons consisting primarily of methane in addition to various smaller amounts of other higher alkanes. |
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Oil shales |
Oil shales are underground rock formations that contain trapped petroleum. |
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Bitumens |
Bitumens are engineering materials produced by the distillation of crude oil during petroleum refining. |
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Tar sands |
Tar sands (oil sands) are a mixture of sand, clay, water and bitumen. |
