12 terms

chapt 16 sci vocab

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kinetic theory
a theory that explains that the behavior of physical systems depends on the combined actions of the molecules constituting the system
melting point
the temperature at which a substance changes from solid to liquid
heat of fusion
amount of energy required to change a substance from the solid phase to the liquid phase.
boiling point
the temperature at which a substance changes from a liquid to a gas
heat of vaporization
the amount of heat energy required to convert one gram of a substance from a liquid to a gas
diffusion
the movement of molecules from an area of higher concentration to an area of lower concentration
plasma
state of matter made up of electrically charged particles
thermal expansion
The increase in volume of a substance due to an increase in temperature.
buoyancy
the ability to float
pressure
the amount of force exerted per unit area of a surface
viscocity
the liquids resistance to flow
pascal
SI unit of pressure.