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