heat is not a substance (matter) —but a form of energy
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Heat is not a substance (matter) —but a form of energy. Matter Ener g y. ≠. ≠. ≠. ≠. Hand Movement. Drum Sound. Lamp Light. Coal Heat. Heat is energy. A fast-moving molecule is a hot molecule. A slow-moving molecule is a cold molecule. . - PowerPoint PPT PresentationTRANSCRIPT
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Heat is not a substance (matter)
—but a form of energy.
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Matter Energ yHand Movement≠Drum Sound≠Lamp Light≠Coal Heat≠
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Heat is energy.
A slow-moving molecule is a cold molecule.
A fast-moving molecule
is a hot molecule.
To heat something up is to speed up its molecules.
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Heat (energy) can be transferred from object to object.
Heat transfer:The movement of heat from hotter objects to colder objects through conduction, radiation, and convection.
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Conduction:The transfer of heat between substances in direct contact. If two objects touch, energy is transferred from the hotter object to the cooler object.
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Gloop ConductionA hot (red) gloop touches a cold (white) gloop in the game.The gloop skin has tiny fibers, some of which touch.
The heat moves from a warmer to a neighboring cooler fiber, leaving the warmer one cooler and warming the cooler one.When all fibers are equally warm, the movement stops.
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Radiation:When electromagnetic waves hit an object heat energy is transferred to the object. Waves of radiation travel easily in a vacuum as there are no obstacles.
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As the gloop in the game rises, it transfers its heat to the egg through radiation which Is seen as a halo around the gloop.
Gloop Radiation
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Convection:Liquids and gases rise as they get heated and fall as they cool. Heat is carried from place to place with the movement of these fluids.
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Gloops in the game can transfer heat by convection when heat moves with the gas or liquid until it touches a cooler gloop.
Gloop Convection
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Example of…Conductionbeing warmed by touching a hot cup—or loosing heat by touching an ice-pack, which gradually becomes warmer from the heat leaving your skin
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Example of…Radiationbeing warmed by sunlight, which travels through space (a vacuum)
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Example of…Convectionbeing warmed in a room heated by a stove, where the air carries the heat around the room—or in a bathtub, where the water carries the heat from the boiler