Chapter 6: Thermal Energy
Date:____________
Section 2: Transferring Thermal Energy - Notes
Learning Goals:
 Compare the transfer of heat energy through conduction, convection, and radiation.
 Compare and contrast conductors and insulators.
 Explain how insulators are used to control the transfer of thermal energy.
Transferring Thermal Energy:

There are 3 ways that thermal energy is transferred from place to place:
o
______________________________
o
______________________________
o
______________________________
Conduction:

Conduction: transfer of thermal energy by ____________________ between particles in matter
o
Think of a metal spoon being heated by a flame.

_____________________________ of the particles close to the flame increases.

Those particles collide with the particles close to them and _________________
____________________ is transferred.

Conduction occurs when thermal energy is transferred from place to place without the transfer
of ________________________!

Heat Conductors:
o Heat moves fastest by conduction in _________________________________.
o
Heat moves a little _____________________ by conduction in ____________________.
o
Heat moves the slowest by conduction in _____________________ because the
particles are so far apart.
o
The best conductors of heat are _________________________ because their electrons
flow freely through the metal.
o
Silver, _____________________, and aluminum are among the best conductors of heat.
Convection:
 Convection: transfer of thermal energy in a fluid (__________________________) by the
______________________________ of warmer and cooler fluid from place to place.

More energetic particles ____________________ with less energetic particles and transfer
____________________________________.

More energetic particles move ___________________ from place to place.

The Lava Lamp:
o
Oil is ____________ and dense and sits on the bottom of the lamp.
o
As it ____________, the oil expands and becomes less dense than the
surrounding fluid.
o
The oil then rises and loses _______________ to the surrounding fluid.
o
It becomes dense again and ____________.
Radiation:

Radiation: transfer of energy by ___________________________________________________.

Energy transferred by radiation is called
_____________________ energy.

When you stand near a fire to ___________ your
hands, you are warming them using radiation.
Insulators:
 Insulator: material that ___________________________ heat transfer

__________________ are usually much better insulators than solids or liquids.
o
Conduct heat poorly since particles are ________________________.