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Layers of the Atmosphere
The Earth’s Atmosphere Definition- A thin layer of air
that forms a protective covering around the planet
Gases found in the atmosphere Nitrogen – 78% Oxygen – 21% 1% - trace amounts of other
gases
Solids found in the atmosphere dust salt pollen
Liquids found in the atmosphere water up to 4% water vapor
Troposphere Closest layer to Earth’s
surface - We live here! All weather occurs here 99% of all the water vapor
is found here 75% of all atmospheric
gases are found here
The temperature decreases as you go up in altitude ( drops ~6.5 C foe every km)
Gases close to Earth are heated by Earth’s surface & as you move farther away from the surface the air gets cooler
Stratosphere The ozone layer is found here
Ozone is made up of 3 oxygen atoms Protects us from the Sun’s
ultraviolet rays
Planes and jets fly here because it is stable here
Weather balloons found here
The temperature increases as you go up in altitude because ozone layer absorbs Earth’s radiation
Mesosphere Scientists know least about
this layer Meteors burn up in this layer
because of friction with the air molecules (called “shooting stars”
This is the coldest layer (b/c air molecule thin out
with height so they don’t absorb as much radiiation)
Temperatures decrease as you go up in altitude
Thermosphere Thickest layer Contains the ionosphere
A layer of electrically charged particles
Allows radio waves to travel aCuculutcuculclualdjflkadnsfcross the country
Causes the Northern and Southern lights (auroras)
Temperatures increase as you go up in altitude