Crude Oil, Oil obtained from the ground, Porous Layer, Rocks that contain empty spaces that can be filled with air/ water, Refining, The process of removing impurities or unwanted elements from oil, Coal, Hydrocarbon that is used as fuel to generate electricity., Natural Gas, Methane that is usually located near petroleum or coal., Global Warming, Warming of the Earth caused by humans, Wind Energy, A clean, renewable energy resource that is generated from wind., Solar Energy, A clean, renewable energy resource that is harvested from the sun's energy., Energy Conservation, Conservation of energy resources., Penstock, A pipe that feeds into a turbine within a hydropower dam.

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