Presentation on theme: "Thermal Energy Conduction, Convection and Radiation."— Presentation transcript:
Thermal Energy Conduction, Convection and Radiation
How Heat Travels Heat moves from ________ matter to ________ matter. Heat moves in 3 different ways: __________ warmer cooler Conduction Convection Radiation
Conduction Definition: The transfer of __________ through a material by ___________ __________. Examples: direct contact heat A metal spoon gets hot quickly in hot cocoa An 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