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PSQ3W6PHYS

HEAT AND TEMPERATURE

QuestionAnswer
Temperature a measure of the average kinetic energy of the molecules of a substance.
Heat total amount of energy possessed by the molecules of a substance.
Absolute Zero temperature where the particles of a substance have the minimum possible kinetic energy.
Kinetic Theory of Matter heat energy is the total kinetic energy of all the atoms in a sample of matter; these atoms are in constant motion; the more they move around, the more heat energy the object has.
Heat Transfer when two materials contact each other, heat will always move from the warmer material to the cooler material; example, when you place your hand into hot water, energy enters your hand because the water is hotter than your hand.
Conduction heat transferred from one substance to another by direct contact.
Radiation energy transported by waves; able to travel through space; example is the warmth that you feel when you sit in front of a campfire.
Convection driven by differences in density. A warmer gas or liquid is less dense than a cooler one; warm materials rise and cool materials sink.
Gabriel Fahrenheit (1686-1736) developed one of the earliest thermometers; scale used in this country
Celsius Scale commonly used in science and most of the world; freezing point of water is 0 degrees and boiling point of water is 100.
Kelvin scale same as the Celsius scale, but starts at absolute 0 (coldest possible temperature)
Created by: Ruth.Miller
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