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