Heat Transfer
& Heat transfer notes
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GSE: S8P2.
● Obtain, evaluate, and communicate information
about the law of conservation of energy to develop
arguments that energy can transform from one
form to another within a system.
👉d. Plan and carry out investigations on the effects of heat
transfer on molecular motion as it relates to the collision of
atoms (conduction), through space (radiation), or in currents in
a liquid or a gas (convection).
Essential Question:
What do particles/atoms/molecules do
when their temperature rises?
Thermal energy flows from higher
temperature to lower temperature.
-
This process is called
Heat Transfer.
🔥
3 ways that heat flows
-
1. Conduction
2. Convection
3. Radiation
#1
-
Conduction
Heat conduction is the transfer of heat by the direct contact of particles of
matter.
Conduction happens when 2 materials of different temperatures are
touching each other (!direct contact!) .
Conduction can transfer heat through materials.
Conduction Examples
Materials of
Conduction:
- Conductors
- Insulators
#2
-
Convection
Convection is the transfer heat by the motion of matter through moving
water or air.
Heat rises in air and water. So, heat is circulating up (transferring heat) and
forcing cooler air or water down.
Convection Examples:
●
WATER
●
AIR
#3
-
Radiation
Radiation is the transfer of heat
by electromagnetics waves
(including light!) produced by
objects because of their
temperature.
-
Radiation increases when
temperature rise or get higher.
Materials of Radiation
-
Some surfaces absorb more
thermal energy or radiation
depending upon the surface of
material.
-
Black Surfaces absorbs almost
all thermal radiation.
-
Mirrored or silver surfaces
absorbs little radiation and
reflects almost all radiation.
Radiation Examples:
-
The sun transfers its heat to the Earth by thermal radiation.
Radiation Examples:
3 Ways that Heat
Is Transferred:
Jeopardylabs- Heat Transfer