the transfer of heat. energy is the ability to make things move or change; all matter is made up of...
TRANSCRIPT
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The Transfer of Heat
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Energy
Is the ability to make things move or change; all matter is made up of tiny particles or molecules
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Molecules in Solids
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Thermal Energy
Is the energy of these particles moving; we feel this as heat Molecules move faster
when warm.
Molecules are slo
wer
when cool.
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What happens when particles or molecules are heated/cooled?
When molecules are heated they move faster and expand (spread apart); heated air or water becomes less dense (lighter) when heated
When molecules become cooler they slow down and tend to compact (get closer), become more dense (heavier)
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Molecules in Liquids
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Water Molecules: Evaporation & Condensation
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Molecules Expand & Contract
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More about Matter
http://studyjams.scholastic.com/studyjams/jams/science/matter/solids-liquids-gases.htm
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Heat Transfer in Matter
The movement of heat; heat always flows from a warmer object to a cooler one
There are three ways heat transfer can happen:
Conduction, Convection, and Radiation
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Conduction
Is the transfer of heat (thermal energy) between things that are touching
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Conductors
Materials through which heat can move easily; metals like iron, copper, and steel
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Insulators
Material that heat does not move through easily; plastic, rubber, wood, leather, glass, and ceramic
Ceramic Tiles
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Conduction
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Convection
Is the transfer of heat by the movement of liquids or gases
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Convection
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Convection
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Radiation
Is the transfer of heat energy by electromagnetic waves
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Radiation
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3 Types of Heat Transfer
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3 Types of Heat Transfer