Heat Transfer NOTES By: Laura LeMay. Thermal Energy TOTAL energy of motion in molecules of a...

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