2 Heat transfer Everything is made of molecules. When molecules gain energy they move faster and create more heat.(The faster the molecules move the hotter they are)MeltingEvaporationCondensationFreezingliquidSolidGasMolecules move very slowly! They are close together.Molecules move faster and are more spread apart.Molecules move very fast! They are very spread apart.
4 Pair/Share What happens to molecules as you add heat? Are the molecules of water moving faster or slower in cold water? WhyEvaporation is when a Liquid turns into a ____________. Heat is __________.Freezing is when a _________ turns into a ____________. Heat is _____________.If the molecules are moving faster and our more spread out. Was heat added or removed?
5 HeatIs the transfer of thermal energy from a hotter object to a cooler one until both objects are the same temperature.(You can not transfer cold or give someone cold)heat transfer video clip
6 Pair/Share Which direction does heat transfer? A. From warmer to coolerB. From cooler to warmerC. both directionsWhen you touch something cold which direction is heat being transferred? Why?Explain why you feel cold when you touch something that is cold.
7 3 ways that heat is transferred within the atmosphere RadiationConductionConvection
8 The first method of heat transfer How does heat energy get from the Sun to the Earth?RADIATION?
9 electromagnetic waves? RadiationWhat createselectromagnetic waves?Video clip 1video clip 2Eureka start at 2:30The direct transfer of energy by infrared electromagnetic Waves.Sun, fire, light bulbs
14 ConductionWhen you heat a metal strip at one end, the heat travels to the other end.As you heat the metal, the particles vibrate, these vibrations make the adjacent particles vibrate, and so on and so on, the vibrations are passed along the metal and so is the heat. We call this?
16 Pair Share:Partner A: Using the picture on the right explain the conduction processPair Share:Partner B: Explain how the picture on the left is conducting heat.
17 Heat video clips\Convection2.asf convection video clipHeat video clips\Convection2.asfConvection- EurekaThe transfer of heat by movement of a fluid (liquids and gases).Cooking peas in waterOVENDryerBlow Drying your Hair.
18 Water movement Cools at the surface Convection current Hot water rises Cooler water sinks
22 Heating the troposphere Radiation, conduction and convection work together to heat the troposphere.Radiation- heats the EarthConduction- Air near earth’s surface is warmedConvection- the warm air molecules rise and transfer heat to the cooler air molecules. Eventually these molecules cool and sink back down to earth. This creates Convection Currents.
23 Radiation, Convection and Conduction work together to heat the troposphere. review of all 3 typesRadiationConvection CurrentConduction
24 ReviewHeat transfer from a hotter object to a cooler object until both objects are the same temperature.3 types of heat transferRadiation – electromagnetic wavesConduction – touchingConvection- through a fluid (liquid or gas)All 3 work together to heat the troposphere but Convection causes most of the heating.
25 ReviewHeat transfer from a hotter object to a cooler object until both objects are the same temperature.3 types of heat transfer review, review 2Music ReviewRadiation – electromagnetic wavesConduction – touchingConvection- through a fluid (liquid or gas)All 3 work together to heat the troposphere but Convection causes most of the heating.
26 Radiation, Convection and Conduction work together to heat the troposphere.