Heat energy flows from warmer to cooler areas
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Transcript Heat energy flows from warmer to cooler areas
Heat energy flows
from warmer to cooler
areas
Lesson 1.3
You will learn:
How heat is transferred in matter;
How the process of conduction
transfers heat;
How the process of convection
transfers heat
Heat flow by conduction requires
contact
Conduction is the
process that moves
energy from one
object to another
when they are
touching
Metals are good
conductors of heat
Insulators are poor
conductor of heat
Heat flow by convection involves
a flow of matter
Convection is the process that
transfers energy from place to place
by the motion of a gas or liquid
Convection occurs in fluids
Density
A substance’s density
is a measure of the
amount of mass it
contains per unit
volume.
The density of
substance changes as
its temperature changes
Cold liquid is more
dense compared to
warmer liquid
Density and Convection Currents
Convection
current is a pattern of
movement that occurs when a gas or
liquid rises as it becomes warmer in
one area and sinks as it becomes
cooler in another area
summer
fall