| A | B |
| kinetic energy | the energy an object has because it is moving |
| potential energy | stored energy, or energy that an object has due to its position |
| sound energy | the energy of vibrations carried by air, water, or other substances |
| radiant energy | the energy that travels as waves and can move through empty space |
| electrical energy | the energy carried by electricity |
| frequency | the number of waves passing a point in one second |
| nuclear energy | the energy produced when atoms split apart or when two atoms join to form one atom |
| chemical energy | the energy released by chemical changes |
| thermal energy | the energy of the movement of atoms and molecules |
| wavelength | the distance from a point on a wave to the same point on the next wave |
| vibration | a rapid back and forth motion of air or other matter |
| mechanical energy | the energy an object has due to its motion, position, or condition |