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### 14 Cards in this Set

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 What is temperature? The measure of the average kinetic energy of the particles in a sample of matter. Thermal Energy the total energy of the particles in a material (including potential and kinetic) Heat the thermal (or internal) energy that flows from something with a higher temperature to something with a lower temp Conduction the transfer of energy through matter by direct contact of particles -occurs in solids, liquids, and gases, but easiest in solids Convection transfer of energy by the bulk movement of matter (only occurs in fluids: gases & liquids) Fluid any material that flows Radiation the transfer of energy in the form of electromagnetic waves (energy travels this way often called radiant energy) -doesn't require matter so works in vacuum of space -occurs in solids, liquids, or gases -can be reflected, absorbed, and transmitted Insulators do not allow heat to move easily through them (e.g. wood, plastic, glass, fiberglass) R-value indicates an objects resistance to heat flow (higher ones are better insulators) Kinetic Theory all matter is made up of particles that are in constant motion and that rate of motion depends on the temperature Thermal Energy vs. Temp thermal energy varies with the mass of the object but temp doesn't Thermal Energy vs. heat an object contains thermal energy but doesn't contain heat good conductors metals poor conductors gases, air