Science 7
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Created by:
SavellDuett on November 8, 2011
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21 terms
Terms | Definitions |
|---|---|
 amperes | electric current is measured by this |
| attract | opposite charges do this |
| charging by contact | the processing of transferring charge by touching or rubbing |
| charging by induction | the rearrangement of electrons on a neutral object caused by a nearby charge object |
| circuit breaker | contains a small piece of metal that bends when it gets hot opening the circuit and stopping the flow of current |
| dry cell | a battery that produces a voltage difference between its zinc container and its carbon suspension rod, cuaing current to flow between them |
| electrical fuse | contains a small piece of metal that melts if the current becomes too high opening the circuit and stopping the flow of current |
| electrons | atoms become charged by gaining or losing these |
| electroscope | the presence of electric charges can be detected by this |
| grounding | using a conductor to direct an electric charge into the ground |
| lightning | the discharge of electrons from a cloud to the earth |
| neutrons | have a neutral charge |
| open circuit | if any part of a series circuit is dieconnected, no current flows through the circuit |
| ohm | resistance is measured in this |
| parallel circuit | contains 2 or more branches for current to move through |
| protons | have a positive electric charge |
| repel | like charges do this |
| resistance | the tendecy for a marterial to oppose the flow of electrons changing electrical energy into thermal energy and light |
| series circuit | the current has only 1 loop to flow through |
| static discharge | a transfer of charge through the air between two objects because of a buildup of static electricity |
| wet cell | battery that contains two connected plates made of different metals in a conducting solution |
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