| A | B |
|---|
| radiation | transfer of energy by waves |
| convection | transfer of heat energy through liquids & gases by moving particles |
| conduction | transfer of heat energy by direct contact between particles |
| friction | force produced by the rubbing of one thing against another |
| force | a pull or push |
| energy | the ability to do work or cause change |
| effort force | force applied to object to move it |
| resistance force | force that resists, or opposes, motion |
| work | movement of a force through a distance |
| kinetic energy | energy of motion |
| joule | basic unit of energy & work |
| potential energy | stored energy |
| newton | unit used to measure force |
| formula for work | work = force x distance |
| electromagnetic energy | wave energy; may be visible or invisible |
| glucose | how plants store energy; sugar |
| medium | a gas, liquid, or solid |
| Calorie | measure of energy in foods |
| lubricants | fluids that reduce friction |
| visible electromagnetic energy | light |
| invisible electromagnetic energy | X-rays, ultraviolet radiation, infared radiation |
