| A | B |
| Heat | Flow of energy due to a temperature difference |
| Temperature | A measure of how hot or cold something is in relationship to some standard |
| Entropy | A measure of the disorder of a system |
| Energy | The capacity to do work or produce heat |
| Adiabatic process | No heat enters or leaves the system |
| Thermodynamics | The study of energy and its interconversions |
| Absolute zero | The lowest possible temperature |
| Regulation | Process of melting under pressure |
| Evaporation | Change of phase from liquid to gas |
| Condensation | Change of phase from gas to liquid |