Bell RingerBell Ringer

Name the four layers of the atmosphere and Name the four layers of the atmosphere and describe the temperature in each layer.describe the temperature in each layer.

1.1. Troposphere: decreasing temp.Troposphere: decreasing temp. weatherweather

2.2. Stratosphere: increasing temp.Stratosphere: increasing temp. Ozone layerOzone layer

3.3. Mesosphere: decreasing temp.Mesosphere: decreasing temp. Coldest layerColdest layer

4.4. Thermosphere: increasing temp.Thermosphere: increasing temp. ionosphereionosphere

Chapter 23Chapter 23The AtmosphereThe Atmosphere

Section 1Section 1

Characteristics of AtmosphereCharacteristics of Atmosphere

Notes 23-3Notes 23-3

Air pollutionAir pollution

Any substance in the atmosphere that is Any substance in the atmosphere that is harmful to people, animals, plants or harmful to people, animals, plants or propertyproperty Sulfur dioxideSulfur dioxide Carbon monoxideCarbon monoxide LeadLead HydrocarbonsHydrocarbons OzoneOzone

Air pollutionAir pollution

EffectsEffects Long-term effects on healthLong-term effects on health Decreases one’s ability to resist many Decreases one’s ability to resist many

diseasesdiseases

EPA’s Health Effects of Air PollutionEPA’s Health Effects of Air Pollution http://www.epa.gov/oar/oaqps/air_risc/3_90_0http://www.epa.gov/oar/oaqps/air_risc/3_90_0

22.html22.html

Air PollutionAir Pollution

SourcesSources Burning of fossil fuelsBurning of fossil fuels Before automobiles, factories and homes Before automobiles, factories and homes

burning coal was the top causeburning coal was the top cause Today it comes from burning coal and Today it comes from burning coal and

petroleum fuelspetroleum fuels

ProducesProduces Sulfur dioxide, hydrocarbons, nitrogen oxide, Sulfur dioxide, hydrocarbons, nitrogen oxide,

carbon monoxide and leadcarbon monoxide and lead

Air PollutionAir Pollution

Acid RainAcid Rain Pollutants in the air when combined with Pollutants in the air when combined with

water in the atmosphere causes acid rainwater in the atmosphere causes acid rain Falls to the ground in the form of rain, snow, Falls to the ground in the form of rain, snow,

sleet or mistsleet or mist Can kill crops and other plants, poison fish Can kill crops and other plants, poison fish

and ruin soiland ruin soil

Air PollutionAir Pollution

Temperature Inversion:Temperature Inversion: When warm air traps cold air at the surface of When warm air traps cold air at the surface of

the earththe earth This doesn’t allow for air circulation This doesn’t allow for air circulation

Normally warm air is at the surface and cold air is Normally warm air is at the surface and cold air is above itabove it

Pollution also gets trappedPollution also gets trapped Produces smogProduces smog

Combines smoke and fogCombines smoke and fog

Air PollutionAir Pollution

Temperature InversionsTemperature Inversions Topography can make it worseTopography can make it worse In Los Angeles, cool Pacific air, that is In Los Angeles, cool Pacific air, that is

polluted, is trapped.polluted, is trapped. Mountains that boarder the city keep air from Mountains that boarder the city keep air from

circulatingcirculating

Temperature InversionTemperature Inversion

HomeworkHomeworkSection ReviewSection Review

p. 462p. 462

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