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27 Cards in this Set
- Front
- Back
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The quantity that indicates how warm or cold an object is with respect to some standard.
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Temperature
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The number assigned to the lowest possible temperature
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Absolute zero
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What is the number scale with no negative numbers?
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Kelvin scale
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The energy resulting from heat flow
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Thermal energy
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The energy transferred from one object to another because of a tempreature difference between them.
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Heat
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From the higher-temperature substance to the lower-temperature substance.
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Heat flow
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Never flows of itself from a lower-temperature substance into a higher-temperature substance. Depends on the amount of matieral.
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Heat flow
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When a substance absorbs or gives off heat, the _____energy of the substance increases or decreases.
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Internal
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Transmission of heat through energy transfer from particle to particle within certain matierals, or from one matieral to another when two are in direct contact
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Conduction
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Heat transfer due to the actual motion of the fluid itself. Involves the motion of blobs of matter (the overall motion of a fluid)
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Convection
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Energy transmitted by electromagnetic waves
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Radiation
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The change of phase from liquid to gas that occurs at the surface of a liquid
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Evaporation
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The changing of a gas into a liquid
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Condensation
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The change of phase throughout a liquid rather than only at the surface.
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Boiling
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If enough heat is absorbed, the attractive forces between the molecules will no longer be able to hold them together
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Melting
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As energy is withdrawn from a liquid, molecular motion diminishes until the molecules, on the average, are moving slowly enough so that the attractive forces between them are able to cause cohesion
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Freezing
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Phase of matter beyond the liquid phase, wherein molecules fill whatever space is avalible to them, taking no definite shape
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Gas
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Phase of matter between the solid and gaseous phases in which the matter possesses a definite volume but no definite shape
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Liquid
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Phase of matter characterized by definite volume and shape.
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Solid
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Requires a transfer of energy
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Change of Phase
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When the tempreature of a substance is increased, its molecules or atoms jiggle faster and move farther apart, on the average.
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Thermal expansion
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Quantity of heat required to raise the temperature of a unit mass of a substance by one degree Celcius
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Specific heat capacity
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Metals
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Thermal conductors
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Wood, wool, straw, paper, cork, styrofoam, and most liquids and gasses
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Thermal insulators
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A change of phase takes place at a constant...
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temperature
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The distance between adjacent crests of a wave is a measure of a wave's...
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wavelength.
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T or F: Sound waves require a medium for propagation
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True
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