Heat engine

A heat engine is a machine that uses heat energy to do a job. It uses heat to make something else happen, like a wheel turn or an electric current move. Heat is put into one part of the engine and then released from another part of the engine. A heat engine takes the heat in, uses it to do work, and then gives out the heat in a cooler form. It's like putting a pot of boiling water on the stove and using the steam created to turn a wheel. The heat from the water is used to make the wheel turn, and when the wheel stops, the heat is released into the air.