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27 Cards in this Set

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As energy is withdrawn from a liquid, molecular motion diminishes until the molecules, on the average, are moving slowly enough so that the attractive forces between them are able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