Types of Heat Transfer 1

Heat The movement of thermal energy from one place to another due to a difference in temperature. In other words, heat travels from a hot area towards a cold area. 2

On page 7 of your Interactive Notebook, draw the demonstration with food coloring and hot a cold water. In which beaker is the food coloring spreading out the fastest? Why does the food coloring spread out faster in one beaker than the other? Beneath your diagram, describe what happened. 3

The movement of heat by invisible waves, so one can feel the heat without touching the object. 4 Radiation

Takes place in fluids such as liquids or air. Occurs when hot air or liquid rises and cold air or liquid moves in to take its place. 5 Convection

Takes place when heat moves from one area of an object to another area of the object without the object itself moving. 6 Conduction

Types of Heat Transfer Conduction Convection Radiation 7

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Examples of conduction A spoon being heated up while in a bowl of soup. A car engine heating up. Your butt warming up the seat of your chair. 9

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Which objects make good conductors of heat? Metals Glass 11

Which objects make poor conductors of heat? Styrofoam Wood Air and fluids 12

Examples of radiation Heat from the sun warming your body. Heat from a fire warming your hands. 13

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Examples of convection Heating up a pot of soup. Warm air coming out of the vent in your house and heating up your room. 15

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Heat transfer animation online.com/objects/index_tj.asp?objid=SC E304 17

Since heat moves from place to place, heat in the atmosphere moves around on the Earth. This causes changes in weather. 18

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Convection currents 20

Ever notice how it is hotter upstairs than downstairs? Ever wonder why hot air balloons float? It is because hot air rises. 21

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Convection in our atmosphere 23

24 Radiation

Exit Ticket-Heating the Atmosphere 25 A. C. B. Adapted from: Prentice Hall: Science Explorer, Weather and Climate