| A | B |
|---|
| acceleration | the rate of change in velocity |
| conductor | material that allows heat or electricity to move easily through it |
| energy | the ability to cause change |
| energy transfer | the movement of energy from one place to another |
| force | a push or a pull on an object |
| friction | the force that opposes motion between two surfaces that are touching each other |
| gravity | force of attraction exerted by every object in the universe on every other object; based on mass and distance |
| heat | thermal energy that flows naturally from a warmer object to a cooler object |
| inertia | the tendency of an object to resist any change in its motion |
| insulator | material that does not allow heat and electricity to move through it easily |
| law of conservation of energy | energy cannot be created or destroyed, but can be transformed from one form to another |
| metals | elements to the left of the stairstep line on the periodic table; shiny; good conductors of heat and electricity |
| net force | the force that remains after forces are combined |
| Newton's 1st Law of Motion | an object at rest stays at rest unless acted on by an outside force; an object in motion stays in motion unless acted on by an outside force |
| Newton's 2nd Law of Motion | if a net force acts on an object, it will accelerate in the direction of the force; F = m x a |
| Newton's 3rd Law of Motion | for every action, there is an equal and opposite reaction |
| velocity | the speed and direction on a moving body over time; v = d/t |
| weight | the measurement of the force of gravity pulling on the mass of an object |
| work | the transfer of energy through motion; W = F x d |
