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37 Cards in this Set
- Front
- Back
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atoms and molecules
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what matter is made of
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density
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amount of mass in a certain volume
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heat
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total kinetic energy of the molecules of a substance
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boiling
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the point when vapor bubbles form in a liquid due to an increase of temperature and rise to the surface increasing evaporation
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solid
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has a definite shape and volume
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condensation
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change from a gas to a liquid by cooling
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a phase change is what kind of change?
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physical change
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kinetic energy theory of matter
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idea that molecules in a substance are always moving
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conduction
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energy transfer by direct contact between particles
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thermometer
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tool useed to measure temperature
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Phase Change
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physical change that involves a change in teh state of matter
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kinetic molecular theory
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matter is in constant motion, higher temp = higher kinetic energy or molecular motion
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insulator
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material that prevents conduction
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vaporization
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change from a liquid to a gas by heating
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kilocalorie
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1000 calories
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Phase Change
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physical change that involves a change in teh state of matter
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calorie
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amount of heat needed to raise the temperature of one gram of water one degree
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Celsius Scale
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temperature scale in which water boils at 100 degrees and freezes at 0 degrees.
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__ibrate
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to set up an instrument so that its readings are the same as those of a standard
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calorimeter
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tool used to measure heat
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thermal equilibrium
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when objects reach the same temperature
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sublimation
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change from a solid directly to a gas without a liquid phase
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formula for finding average temperature
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T = a(Ta) + b (Tb/a + b
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expansion
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an increase in the size of an object
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liquid
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has a definite volume but no definite shape
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gas
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has no definite volume or shape
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Lauric Acid freezes/melts at...
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43 degrees C
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melting
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change from a solid to a liquid by heating
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plateau
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straight line, phase change
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plasma
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state of matter consisting of super-heated electrically charged particles
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convection
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energy transfer by movement of a large mass of liquid or gas
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freezing
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change from a liquid to a solid by cooling
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radiation
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transfer of energy in waves, does not require matter`
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evaporation
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the gradual change of a substance from a liquid to a gas at temperatures below the boiling point. evaporation occurs at the suface of a liquid
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degree
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unit for temperature
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temperature
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a measure of the average kinetic energy of molecules of a substance
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Fahrenheit Scale
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temperature scale in which water freezes at 32 degrees
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