| A | B |
|---|
| motion | state in which one's (when an) object's distance from another is changing. |
| reference point | a place or object used for comparison to determine if an object is in motion. |
| speed | the distance an object travels in one unit of time. |
| velocity | speed in a given direction. |
| acceleration | the rate at which velocity changes. |
| force | push or pull exerted (put) on an object. |
| unbalanced force | a nonzero net force that changes an object's motion. |
| balanced force | <=> equal forces acting on an object in opposite directions. |
| work | the product of force and distance when a force is used to move an object. |
| energy | ability to do work or cause change (example; to move something). |
| potential energy | energy that is stored and available to be used later. |
| kinetic energy | energy that an object has due to its motion. |
| convection | the transfer of thermal energy by movements of a fluid. |
| conduction | the transfer of thermal energy through direct contact between particles of matter. |
| radiation | the transfer of energy by electromagnetic waves. |
| heat transfer | the movement of energy from a warmer object to a cooler object |
