| A | B |
|---|
| the ability to do work | energy |
| the measure of how much useful work a machine puts out compared to the amount of work put into it | efficiency |
| the distance an object moves in a certain amount of time | speed |
| a material that transfers heat well | conductor |
| the object being lifted or moved by a simple machine | load |
| the bending of light as it passes from one material into another | refraction |
| the highness or lowness of a sound | pitch |
| when a force is used to move an object a certain distance | work |
| the force that works against motion between surfaces that touch | friction |
| the energy in a sound wave | amplitude |
| a material that does not transfer heat very well | insulator |
| the number of times a sound source vibrates in one second | frequency |
| when light strikes a surface and bounces off | reflection |
| a range of light waves with different wavelengths and energies | spectrum |
| the transfer of heat through space | radiation |
| words such as above, below, left, right, north and south give clues about what | position |
| a pulley is one type of what | simple machine |
| what does a rock rolling down hill have | kinetic energy |
| What are sources of heat such as coal, oil, and natural gas examples of? | fossil fuels |
| lenses are tools that do what to light | refract |
| what does the number of times a sound source vibrates in one second determine | pitch |
| what does sound carry because it is needed to start an object vibrating to make a sound | energy |
| the opposite of an insulator | conductor |
| a range of all light waves with varying wavelengths make up what | electromagnetic spectrum |
| what is a push or pull that makes an object start moving, stop moving, speed up, slow down, or change direction | force |
