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science quiz(11/4/11

science quiz(11/4/11)

QuestionAnswer
Heat Form of energy that can be transmitted from one place to another through conduction, convection, or radiation – condition of being hot
Physical Change Change that occurs in matter and can be returned to its original condition
Expansion The increase in volume of matter that occurs when matter is heated
Contraction The decrease in volume of matter due to the lack of heat
Temperature The measurement of how hot an object or substance is
Conduction Transmission of heat by transferring energy from one particle to another
Convection Transfer of heat from one place to another by the circulation of currents of heated particles of a gas or liquid
Radiation Energy (heat) given off by electromagnetic waves (waves we can’t see)
Phase Change The changing from a solid to a liquid to a gas or a gas to liquid to solid through change in energy
Solid Has definite volume and shape, and its particles are closely packed and tight with little energy
Liquid Has definite volume and no definite shape, particles are not as closely packed and tight as solids – has some energy
Gas No definite shape or volume, particles a loosely packed and moving with a lot of energy
Melting Changing from a solid to a liquid- Energy increase
Freezing Changing from a liquid to a solid – Energy decrease
Boiling Changing from a liquid to a gas at the substance’s boiling point- Energy increase
Evaporation Changing from a liquid to a gas from the surface of a liquid
Condensation Changing from a gas to a liquid – Energy decrease
Sublimation Changing from a solid to a gas skipping the liquid phase
Freezing/Melting Points 0 degrees Celsius (Water)- freezing Greater than 0 degrees - melts Less than 0 degrees - freezes
Boiling Point Water – 100 degrees Celsius The point at which a liquid turns into a gas
Conservation on Mass No matter is gained or lost when a substance undergoes a phase change
Created by: kellg
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