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Science Exam 2014
| conductor | material in which electrical charges can move freely from place to place |
| Ohm's Law | relationship among resistance, current, and potential difference. V/R=I |
| Circuit | complete, or closed path |
| current | how much electric charge flows past a point in a circuit during a given time. |
| resistance | property of materials that indicates how much energy changes. |
| cold front | when a cold air mass invades a warm air mass. |
| warm front | when a warm air mass meets a cold air mass. |
| relative humidity | a measure of the amount of water vapor in the air. |
| electric motor | uses an electromagnet to change electric energy into mechanical energy |
| electric generator | changes kinetic energy of rotation into electric energy. |
| electromagnetic spectrum | entire range of electromagnetic waves, from extremely low to extremely high frequencies |
| constructive interference | the interference of two or more waves of equal frequency and phase |
| destructive interference | the interference of two waves of equal frequency and opposite phase |
| frequency | the rate at which something occurs or is repeated over a particular period of time or given sample |
| magnetic domains | a region within a magnetic material |
| alpha particle | a helium nucleus emitted by some radioactive substances, originally regarded as a ray |
| beta particle | a fast moving electron emitted by radioactive decay of substances. |
| electromagnet | a soft metal core made into a magnet by the passage of electric current through a coil surrounding it. |
| insulator | a substance that does not allow the passage of heat or sound or conduct electricity. |
| barometer | an instrument measuring atmospheric pressure, used especially in forecasting the weather and determining altitude |
| neutron | a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen |
| proton | a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign |
| electron | a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids |
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