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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
Created by: 100003240776713