## SCIENCE solids liquids gases, TESET

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# SCIENCE solids liquids gases, TESET

 meltingchange of a solid to a liquid (ice into liquid water)
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#### Definitions

melting change of a solid to a liquid (ice into liquid water)
melting point the temperature at which a substance changes from a solid to a liquid. (At 0 degrees Celsius or 32 degrees Fahrenheit)
freezing change of a liquid to a solid
freezing point temperature at which a substance changes from liquid to solid (same temp's as a melting point.
evaporation changing from a liquid to a gas (100 degrees Celsius, 212 degrees Fahrenheit); water puddle into a cloud
boiling point temperature at which a substance changed from a liquid to a gas.
condensation changing from a gas to a liquid ( same temp as evaporation); cloud to a water puddle.
deposition changing a solid directly into gas(skips the liquid phase); cloud into snowflake
deposition changing a solid directly into a gas skips the liquid phase (dry ice)
air pressure the amount of force exerted by a gas depends on its container
pascal force of one newton per meter
boyle's law If you decrease the volume of a container of gas, the pressure of the gas will increase (temperature does not change
archimedes principle the buoyant force on an object in a fluid is equal to the weight of the fluid displaced by the object
buoyant force the ability of a fluid or gas to exert on an upward force on an object immersed in it.
bernoulli's principle as the velocity of a fluid increases the pressure exerted by the fluid decreases
gases a.)do not have a definite shape or volume
b.) expand when cooled
c.) when the particles are farthest apart
plasma a.) a gaslike mixture of positive and negative charged particles
b.) most common state of matter
solids a.)expand and contract the lease amount
b.) closely packed particles
liquid a.) definite volume
b.) take shape of its container
c.) when the particles are close together but not tightly packed, or far apart.
surface tension caused by the inward pull of molecules making up a liquid allows water to form droplets
viscosity the resistance of a liquid flow easily
amorphous solids solids that lose there shape under certain conditions
kinetic theory of matter tiny particles in motion make up all the matter
ice water in the solid state
sublimation the change from a gas to a solid

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