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APES exam review

TermDefinition
electromagnetic radiation energy in the form of light and heat. that is emitted by the sun (primary energy source for earth)
potential energy stored energy that has not been released
kinetic energy the energy of motion
chemical energy potential energy stored in chemical bonds
1st law of thermodynamics a physical law that states that when energy is transformed, the quality of the energy remains the same, however, its ability to do work deminishes
2nd law of thermodynamics a physical law stating that energy can neither be created nor destroyed but can change from one to another
temperature the measure of the average kinetic energy of a substance
energy efficiency the ratio of the amount of energy expended in the form you want to the total amount of energy that is introduced into the system
entropy randomnes in a system
energy quality the ease with which an energy source can be used for work
open system a system in witch exchanges of matter or energy occur across system boundaries
closed system a system in which matter and energy exchanges do not occur across boundaries
input an addition to a system
output a loss from a system
system analysis an analysis to determine inputs, outputs, and changes in a system under various conditions
steady state a state in which inputs = outputs, so that the system does not change over time
negative feedback loop when a system responds to a change by going back to its original state
positive feedback loop when a change in a system is amplified
joule basic unit of energy
10% rule every time energy is transferred to a new level, 90% of the energy is lost, therefore, the next level only holds 10% of the energy from the previous level
Created by: sadiemaeb
 

 



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