Upload
shanon-miller
View
216
Download
0
Embed Size (px)
Citation preview
Heat Transfer NOTESBy: Laura LeMay
Thermal Energy
•TOTAL energy of motion in molecules of
a substance
(therm=heat)
Temperature• Average amount of energy
in motion
* Measured with a thermometer
HEAT Energy Transfers…
•from hotter object to
COLDER objectHeathot cold
3 types of heat Transfer1) Radiation: infrared (not visible) and felt
as heat
2) Conduction: transfer of heat by touch
3) Convection: transfer of heat by movement of fluid (liquid/gas)
Type Definition Examples:
Radiation •infrared (not visible)
•felt as heat
Conduction •transfer of heat by touch
Convection transfer of heat by movement of fluid (liquid/gas)
Radiation (infrared)• Examples:
*Feel warmth on face from sun=
solar radiation
* Warmth of a fire
* Heat off car engine
More examples of radiation
•Heated driveways/
sidewalks
* Heated floors
Conduction=touch• Examples:
* Hot sand on feet
* Touching hot light bulb• * Touching metal on hot seatbelt
* Stove to pan handle
* Melting ice in hand
Convection* Convection in water
* Convection oven
* Holiday chimes
* Spinning Lamps
LOOK AT ALL THREE:
Heat Transfer in the Troposphere
radiation
conduction
* convection
* CONVECTION is the most dominant heat transfer in the troposphere
Temp Conversions• Pop test
• 1) 4 C --------------------- ______ F
• 2) 7 C ---------------------- ______ F
• 3) 14 F -------------------- ______ C
• 4) 0 C --------------------- ______ F
• 5) 21 F ------------------- ______ C