What is CONVECTION Convection is the process by which heat is transferred A warmed liquid or gas comes into contact with an unheated space Heat transfer from liquid to surrounding air We see examples of this every day ID: 626930
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Slide1
Convection
A Process of the Water CycleSlide2
What is CONVECTION?
Convection is the process by which heat is transferred
A warmed liquid or gas comes into contact with an unheated space
Heat transfer from liquid to surrounding airSlide3
We see examples of this every day:
Seeing your breath on a cold day:
Your breath leaves the warmth of your body and touches the cool air
Moisture in your breath quickly condenses as heat transfers to the airSlide4
Boiling Water:
Water at the bottom is hottest, and warmer water is less dense
As
the cooler water sinks to the bottom, the warmer water rises
As the warm water rises, heat transfers to the surrounding air, cooling the water down again and pulling it to the bottom
This c
auses a cycle
,
and that’s why boiling water bubbles
STEAM
is the product of the warm water molecules touching the cooler air and condensing quicklySlide5
A steaming mug of cocoa
The warm liquid reaches the cool air surrounding the cup
The heat from the liquid transfers to the air
Moisture in the cup condenses into steamSlide6
What does this mean for the water cycle?
Convection happens between the steps of evaporation and condensation
It looks like this: