| A | B |
|---|
| ability to do work | energy |
| ability to produce energy | work |
| potential energy | stored energy |
| force that pulls objects together | gravity |
| energy from chemical changes | chemical energy |
| tools that make work easier | machines |
| machine with many moving parts | complex |
| combination of 2 or more simple machines | compound |
| when as much energy is used as possible | efficiency |
| energy in motion | kinetic |
| a type of simple machine | ax |
| a ball moving down a hill has____ | kinetic energy |
| occurs when two forces rub against each other | friction |
| objects in motion tend to stay in motion, st rest tend to stay at rest | inertia |
| push or pull that causes something to move | force |
| simple machine that lifts loads and has a fulcrum | lever |
| simple machine that uses a wheel and rope | pulley |
| two inclined planes put together that pushes things apart | wedge |
| solar energy comes from the ___ | sun |
| electricity that can flow through wires is called what? | current electricity |
| this allows electricity to flow freely | conductor |
| this does not allow electricity to flow freely | insulator |
| pathway taken by electric currents | circuit(s) |
| type of circuit that allows movement of electrical energy | closed circuit |
| prevents the movement of electrical energy | open circuit |
| circuit that provides more than one pathway | parallel circuit |
| rubbing material together creates what? | static electricity |
| the discharge of static electricity | lightning |
| a good conductor of electricity | metal |
| ground water, lakes, rivers, bays, Atlantic Oceanocean | water resources of Virginia |
| area over which surface water flows to a single collection place | watershed |
| what does an anonometer show? | wind speed |
| rotation of the earth on its axis causes these | days |
