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"Since 1970, oil and natural gas have provided more than half of the energy used each year in the United States to produce electricity, heat, transportation fuels, and many everyday products from balloons to vitamins. Oil and natural gas are forms of petroleum, a word that literally means...
Grade Level   8 9 10 11 12
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2
Coal is an organic sedimentary rock that is formed by the compaction and hardening of plant remains. Because coal is mostly composed of carbon, it is a rock that burns in air. The heat that is released by burning coal is used as the primary source of energy for the generation of electricity. About...
Grade Level   9 10 11 12
Classroom Activities Curricula and Instruction
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