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Published bySydney Douglas Modified over 9 years ago
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Heat Notes Expansion – _______ ___________________ Contraction – ______ _______________________ Most materials ________ when heated and _______ when cooled –Exceptions: water expands when it freezes, certain plastics
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Heat Notes Materials expand because heat increases _________ energy. The atoms and molecules bounce around more, knocking each other _______________. –Example: A thermometer works because alcohol expands when it is heated causing it to rise higher in the thermometer when it is hot.
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Heat Notes - Energy Energy is the ability to do ________ Energy can change ____. All energy can change into ______. Potential energy – energy due to an object’s ______ Kinetic energy – energy of _________
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Heat Notes - Temperature All matter is made up of ______ that are in motion. Temperature - ______ _________ of an object Thermometer – measures temperature________
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Heat Notes Heat – amount of __________________ transferred from one object to another Heat moves from ___ ____________ Calorimeter – used to measure _________
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Heat Notes – Heat Transfer Three ways to transfer heat: ______________
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Heat Notes – Convection Transfer of heat through a _________ _________ due to the fact that hot air is less dense than cool air –Hot air rises, spreads out, cools off and sinks –Examples: water boiling, currents in the mantle of the Earth, air in a room
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Heat Notes - Radiation Transfer of heat in ________________ –Colors that absorb radiation = ________ ___________________ –Colors that do not absorb radiation = ________________
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Heat Notes - Conduction Transfer of heat through _______ ____________ - Heat is transferred ______ by a conductor –Heat is transferred ______ by an insulator
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Heat Notes - Conduction Insulate – a material that does not conduct heat well –Examples: _________ ____________________
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Heat Notes - Conduction Conduct – a substance through which electrons move freely, transmitting heat or electricity –Examples: _________ ____________________
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