Memory Game Renewable vs. Nonrenewable Online version Match each vocabulary word with the correct definition. by Krystin Lawhorn The main source of energy today (gasoline, coal and natural gas). Generator Nonrenewable Resource Sources of energy that can be more easily replenished. Renewable Resource Coal Fossil Fuel Natural Gas Energy The ability to do work Changes energy from one form to another. Sources of energy that can't be easily replenished like coal, oil and natural gas. A solid fossil fuel that can be burned for energy. Engine A machine that converts chemical energy from burning fuel to motion. A gas that can be burned for energy.