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### 20 Cards in this Set

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 Archimedes' principle the greek mathematician Archimedes stated that the buoyant force on an object is a fluid is equal to the weight of the fluid displaced bye the object. bermoulli's principle the swiss scientist daniel bernoulli stated that as the velocity of a fluid increases, the pressure exerted by the fluid decreases. boyle's law british scientist robert boyle stated that the volume of a gas decreases when the pressure increases, provided the temperature stays the same. buoyant force ability of a fluid to exert an upward force on an object inersed in the fluid. charle's law french scientist jacques charles stated that the volume of a gas increases when the temperature increases, provided the pressure stays the same. condensation the change of a substance from a gas to a liquid, which usually takes place when a gas is cooled to or below its boiling point. crystal in most solids, the arangements of particles in repeating geometric patterns evaporation the gradual change of a substance from a liquid to a gas at temperature below the boiling point. heat of fusion the amount of energy needed to change a material from the solid state to the liquid state. heat of vaporization the amount of evergy needed to change a liquid to a gas. kinetic theory of matter the idea that all matter is made up of constantly moving, tiny particles. pascal the SI unit of pressure. pascal's principle french scientist blaise pascal stated that pressure applied to a fluid is transmitted unchanged through the liquid. plasma a gaslike mixture of charged and negatively charged particles that exists at extremly high temperatures. polluted water water that contains high levels of unwanted substances that may be harmful to living things. pressure the amount ot force exited per unit of area. states of matter any of the four conditions in which matter can exist thermal expanstion a characteristic of all matter that causes it to expand when heated, and contract when cooled. thermal pollution pouution caused when wasts heat rises the temperature of the environment ventri effect reduction in pressure of a fluid resulting from the speed increase as fluids are forced to flow faster through narrow spaces.