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37 Cards in this Set

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