| A | B |
| thermal energy | total kinetic and potential energy of the particles in a substance |
| heat | thermal energy that moves from one substance to another |
| temperature | measure of the average kinetic energy of an object's particles |
| conduction | heat transfer between two objects that touch |
| convection | heat transfer that causes winds |
| radiation | energy transfer that is part of the greenhouse effect |
| insulator | does not transfer heat easily |
| conductor | transfers heat easily |
| gamma rays | wavelength with the most energy on the electromagnetic spectrum |
| radio waves | wavelength with the least energy on the electromagnetic spectrum |
| refraction | when light changes direction (or bends) when it strikes a surface |
| reflection | when light bounces off a surface |