Atmosphere
A mixture of gases that surrounds a planet or moon.
Atmosphere
Protects you from suns rays.
Atmosphere
Always changing.
The Compostion of the Atmosphere1
78% nitrogen, 21% oxygen, 1% other gases
Invisible Water=
water vapor
Air Pressure
The measure of the force with which air molecules push on a surface.
As altitude increases...
Air pressure decreases.
At earths surface...
air pressure is at its strongest
effects air temperature...
atmosphere composition
as altitude increases...
air temperature changes
Layers of the atmosphere...
4 layers, troposphere, stratosphere, mesosphere and thermosphere
Troposphere
the lowest layer of the atmosphere in which temperature decreases at a constant rate as altitude increases
densest layer
troposphere
troposphere gases...
continually mix
Stratosphere
the layer of the atmosphere that is above the troposphere and in which temperature increases as altitude increases
air is thin
stratosphere
ozone layer
protects life on earth by absorbing harmfull ultraviolet radiation
ozone layer is...
in the stratosphere
Mesosphere
the layer of the atmosphere between the stratosphere and the thermosphere and in which temperature decrease as altitude increases
Coldest layer
mesosphere
Thermosphere
Temperature increases as altitudde increases
Thermosphere
Atoms of nitrogen + oxygen absorb high energy radiation
Thermosphere
Releases thermal energy
Thermosphere
Particles move fast
Particles - spaced out
Don't transfer a lot of energy
Temperature
Measurement of energy of particles in motion
Heat
Transfer of thermal energy between objects of different temperatures
Thermosphere5
Above layer - ionsphere/Auroras
coldest layer
mesosphere
Thermosphere6
Temp in layer - 1000 degrees Celsius or higher
High temp-doesn't feel hot
Atmosphere
Contains oxygen
Composition of the Atmosphere
Small particals-1%
Dust, ash, salt, dirt, smoke, other gases
Stratosphere
gases don't mix
Air is thin - little moisture
Stratosphere
bottom of stratosphere - very cold
average 60 degrees Celsius
90% of atmospheres mass...
Troposphere
Contains: carbon dioxide, water vapor, clouds, air pollution & life forms
Troposphere
Gases mix continuously
Water in atmosphere
liquid water (rain), solid water (snow and ice), water vapor (gas)
Air pressure amount
at sea level, a square inch = 15 lb of air
Gas effect
less gas = cooler tempatures
more gas = warmer tempatures
Ionosphere
at the top of the mesosphere at lower thermosphere
Ionosphere
where nitrogen and oxygen atoms absorb harmful solar energy - thermosphere tempatures rise