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Lesson 1.2 Energy Sources Key Terms

Key Terms

AB
Alternative EnergyAny source of energy other than fossil fuels that is used for constructive purposes.
AmpereThe unit of electric current in the meter-kilogram-second system of units. Referred to as amp and symbolized as A.
BiomassPlant materials and animal waste used especially as a source of fuel.
CurrentThe net transfer of electric charge (electron movement along a path) per unit of time.
Electrical EnergyEnergy caused by the movement of electrons.
ElectricityThe flow of electrical power or charge.
Electromagnetic InductionThe production of electricity in conductors with the use of magnets.
EfficiencyThe ratio of the useful energy delivered by a dynamic system to the energy supplied to it.
EnergyA fundamental entity of nature that is transferred between parts of a system in the production of physical change within the system and usually regarded as the capacity for doing work.
Energy ConversionChanging one form of energy to another.
Environmental Protection AgencyAn organization that works to develop and enforce regulations that implement environmental laws enacted by Congress.
Fossil FuelA natural fuel such as coal or gas, formed in the geological past from the remains of living organisms.
GeneratorA dynamo or similar machine for converting mechanical energy into electricity.
Geothermal EnergyThe use of heat from within the Earth or from the atmosphere near oceans.
Gravitational EnergyThe state when objects are not yet in motion.
InductionThe production of an electric or magnetic state by the proximity (without contact) of an electrified or magnetized body.
Inexhaustible EnergyAn energy source that will never run out.
Kinetic EnergyEnergy which a body possesses by virtue of being in motion.
Nonrenewable EnergyA resource that cannot be replaced once used.
OhmThe unit of electric resistance in the meter-kilogram-second system of units. Symbolized as Ω.
Ohm's LawStates that the direct current flowing in an electric circuit is directly proportional to the voltage applied to the circuit.
Parallel CircuitA closed electrical circuit in which the current is divided into two or more paths and then returns via a common path to complete the circuit.
Potential EnergyThe energy that a piece of matter has because of its position or nature or because of the arrangement of parts.
Power ConvertorChanges one form of power to another.
Power GridA system that links electricity produced in power stations to deliver it to where it is needed.
Renewable EnergyA resource that can be replaced when needed.
ResistanceThe opposition that a device or material offers to the flow of direct current.
WorkA result of a force moving an object a certain distance.
TurbineA machine for producing power in which a wheel or rotor is made to revolve by a fast-moving flow of water, steam, gas, or air.
PowerThe rate at which work is performed or energy is expended.
RotorThe rotating member of an electrical machine.


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