Transcript Know the standard

Know the standard
Understand the structure of and processes within our atmosphere.
~ summarize information from charts and graphs regarding layers of the atmosphere,
temperature, chemical composition, and interaction with radiant energy.
~ explain how air masses move (pressure differentials)
~explain how interactions of air masses form frontal boundaries, clouds, and affect
wind patterns.
(address precautions for severe cyclonic storms to preserve life and property)
~explain factors that affect air density and understand their influence on winds, air
masses, fronts and storm systems.
~ use data to substantiate explanations and provide evidence of various air mass
interactions.
~explain how acid rain is formed and how human activities can alter the pH of rain.
~ infer other human activities that impact the quality of atmospheric composition
(aerosols, chlorofluorocarbons, burning, industrial, byproducts, over farming)
~exemplify methods to mitigate human impact on the atmosphere.
Atmospheric Gases
Atmosphere surrounding
earth extends from Earth’s
surface to outer space.
~the atmosphere is a mixture
of gases with some suspended
solids and liquids.
~Nitrogen is the most common
gas at 78%, Oxygen at 21%
leaving the remaining 1% for
trace gases.
~ water will make up 0-4% of
the atmosphere.
~ when this percentage is
higher it causes the other
gases to be lower.
Other gases
• The atmosphere contains
other gases, smog and
pollution.
• Type of smog affecting an
area depends on the
pollutants.
• Car exhaust expels nitrogen
oxides and unburned
hydrocarbons.
• This pollution with oxygen
and other chemicals in the
presence of sunlight cause
an LA-type, brown smog.
• Sulfur oxides from burning
coal or oil cause a gray
smog.
Los Angeles
Ozone
• Ozone is a component of
smog.
• Ozone is a gas that occurs
naturally in the
stratosphere, but ozone is
not normally found in the
lower part of the
atmosphere.
• When it is formed in the air
above cities, ozone is
considered a pollutant.
• In the lower atmosphere
ozone can harm plants and
damage lungs.
Atmospheric solids and liquids
• Gases aren’t the only thing that make up the atmosphere.
• Dust, salt and ice are 3 common solids found in the
atmosphere.
• Dust gets in the atmosphere when wind picks it up and off
the ground
• Ice is common in the form of hailstones and snowflakes.
• Salt is picked up from ocean spray.
• Atmosphere contains liquid.
• The most common liquid: water found in
droplets of clouds.
• Water is the only substance the exists as a
solid, liquid, and gas in the atmosphere.
Structure of the atmosphere
http://www.slideshare.net/rebelbrindley/atmospheric-layers-28199408
Atmosphere Movie
Part 1
Part 2