| A | B |
|---|
| Force | a push or a pull that acts on an object |
| Gravity | A force of attraction between any two objects |
| Friction | The force that results whenn two materials rub against each other |
| Inertia | The tendency of an object to resist any change in motion |
| Uniform Motion | Motion where the speed and direction do not change |
| Accleration | The rate at which the speed or the direction of motion of an object chabges over time |
| Lever | A simple machine in which a bar moves around a fixed point |
| Incline Plane | A flat surface with one end higher than the other |
| Pulley | A simple machine that consists of a rope or cable that runs around a grooved wheel |
| Potential energy | Energy that is not causing now but could in the future |
| Kinetic energy | Energy due to motion |
| Energy | The ability to do work or cause a change |
| Wavelength | Distance between two compressions |
| Vibration | The back-and-forth motion of an object |
| Frequency | The number of compressions |
| Opaque | A type of material that does not let light through |
| Translucent | a type of material that lets some light pass through it |
| Transparent | A type of material that lets nearly all light in |
