When everyone at your table has completed the assignment, ask your facilitator for a bimetallic strip. Gently heat the strip above a lab burner flame and describe your observations. The bimetallic strip is composed of strips of two different metals fused together. Write your answer on paper and give it to your facilitator. Heat engines are machines that burn some type of fuel to produce heat, then convert the heat energy into mechanical energy.
Most heat engines burn gasoline to produce heat.
In addition to the fuel, large amounts of air are needed for combusion. Fuel is burned outside the engine. Fuel is burned inside the engine. Fuel is compressed to a point where the temperature is high enough for spontaneous combustion. Write a paragraph explaining why two-cycle engines are made, even though they are inefficient.