warm-up get your journal and label a new section “thermal energy notes” open your chrome book...
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Warm-UpGet your journal and label a new section “Thermal Energy Notes”
Open your Chrome Book and get logged in
Got to my website and click on the Unit 4 Tab
Open the PowerPoint and wait for notes to start
Thermal EnergyConduction, Convection and Radiation
How Heat Travels
• Heat moves from ________ matter to
________ matter.
• Heat moves in 3 different ways:
• __________
• __________
• __________
warmercooler
ConductionConvectionRadiation
Conduction
• Definition:
The transfer of __________
through a material by ___________
__________.
• Examples:•
•
direct contactheat
A metal spoon gets hot quickly in hot cocoaAn iron heats up the material it comes in contact with.
Heat transfer by Conduction
•Note that in metals, heat is transferred through free-moving electrons, and in other substances through moving atoms.
*images from http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/energy/heatrev1.shtml
Convection
• Definition:The transfer of heat in a __________ (gas or liquid) as a result of the ______________ of the fluid itself.
• Examples:•
•
movement
fluid
Boiling pasta in water.
Wind currents.
Heat transfer by Convection
•Note that the warm material rises, cools at the surface and then sinks in a circular pattern.
*animation from http://commons.wikimedia.org/wiki/File:Convection.gif
Radiation
• Definition:The transfer of heat via __________________ _________ through ___________ .
• Examples:•
•
waveselectromagnetic
The heat from the sun melting ice cream.
The heat from a campfire.
space
Review All Three
A. B.
C.
Animations of Conduction, Convection and Radiation
• Teacher's Domain Animations
• Movie of convection in the sun
• Effect of heat on atoms
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