- bimetallic strip: a strip consisting of two metals that bends with a rise in temperature
- boiling point: Temperature at which a liquid boils
- compression stroke: the mixture is squeezed into a smaller space as the piston moves back up
- conduction: transfer of heat between particles within a substance
- convection: the transfer of heat by the movement of currents within a fluid
- exhaust stroke: crankshaft turns, and the piston is forced back up pushing exhaust gas out of the cylinder
- external combustion engine: an engine powered by fuel burned outside the engine
- freezing point: the temperature at which a liquid freezes
- ignition: spark plug ignites mixture converting chemical energy to thermal energy making mixture a gas
- insulator: a material that does not allow heat to move through it easily.
- intake stroke: a mixture of gasoline and air enters a cylinder as the piston moves down
- internal combustion engine: an engine that burns fuel inside cylinders within the engine
- melting point: the temperature at which a solid becomes a liquid
- power stroke: as the heated gas expands pushing down the piston thus the piston moves the crankshaft
- radiation: the transfer of energy by electromagnetic waves
- refrigerator: a device that uses outside energy source to transfer thermal energy from a cool area to a warm area
- specific heat: the heat required to raise the temperature of one gram of a substance one degree kelvin
- states: liquid, solid, and gas
- thermal expansion: the expansion of matter when heated
- thermostat: heat-regulating device