temperature inversions. temperature inversion air molecules as you go higher in the atmosphere, air...
TRANSCRIPT
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TemperatureInversions
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Temperature Inversion
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Air Molecules
• As you go higher in the atmosphere, air becomes less dense.
• The air molecules are spaced further apart 1
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Air Molecule Density
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Air Density
• That is why it is hard to breathe at high altitudes.
• That is also why it is colder at high altitudes
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Molecule Density Verses Temperature
Heat is from molecule collisions.
Fewer molecules……
Fewer collisions……
Less heat! 2
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Why Air Density Changes
• The weight of the air causes the at the ground to have high pressure.
• Gravity pulls the air close to the earth
• The high pressure pushes the air molecules close together 3
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Air Molecule Density
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Temperature vs Pressure• As the pressure of a gas drops, it’s
temperature also drops.
• Evidence– Condensation on a Coleman lantern– Warm soda cools when you open it.
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Air Temperature vs Altitude
SO,
The higher you go. . .
The less dense the air . . .
The colder it gets!
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Air Temperature
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Smoke Rises in the Air,Normally
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Why does the hot smoke rise?
4
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• What happens to the temperature of the hot smoke as is rises?
5
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Temperature Inversion
• A temperature inversion is when a layer of warmer air covers the colder air at ground level.
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Temperature Inversion
• It forms when the ground level air is kept cold by the cold ground.
• Then a warm air mass comes from another area and covers the cold air.
• The inversion acts like a lid over the cold ground level air 7-8
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How it Happens
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Smoke Stops Rising!
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Why does the smoke stop rising?
9
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All Over Town
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The Air Gets Dirty!
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Real Dirty!
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Temperature Inversion
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SO WHAT?
• How do
• temperature inversions
• affect us?
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What Can We Do?
What are some ways
we can protect ourselves
from the effects of
temperature inversions?