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9-15-09
| Question | Answer |
|---|---|
| Circut | A closed path through which electricity travels. |
| Electric Current | The flow of electric charges through a circuit. |
| Electromagnet | Made by passing an electric current through a wire that is wrapped around a metal object,such as a nail |
| Resistance | When it is hard for an electric current to pass through something |
| Vibration | The back and forth movement of an object |
| Sound | Made up of vibrations in our surroundings that we can hear. |
| Compression | An area where air particles are pushed together |
| Sound Wave | An alternating area of high and low air pressure that transmits energy through a medium, such as a solid, liquid or gas. |