WHAT I SEE… Four Interactive Systems HYDROSPHERE : All the water on Earth GEOSPHERE: Surface of...
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Transcript of WHAT I SEE… Four Interactive Systems HYDROSPHERE : All the water on Earth GEOSPHERE: Surface of...
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WHAT I SEE… Four Interactive Systems
HYDROSPHERE : All the water on Earth
GEOSPHERE: Surface of the EarthBIOSPHERE: All organisms on
EarthATMOSPHERE: …..
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What is Atmosphere?
A blanket of gases surrounding the Earth.
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The Atmosphere is divided into 5 different layers
1. Troposphere: 0-10km2. Stratosphere: 10-50km3. Mesosphere: 50-100km4. Thermosphere: 100-
500km5. Exosphere: 500-700km
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Make a PredictionIs the atmosphere thick or
thin compared to the radius of the earth?
The atmosphere is very thin!!Analogy If the earth was an
apple the atmosphere would be the skin...
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What is the composition of the Atmosphere?
Gases & Particles
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Atmospheric Gases & Particles
N2,O2= 97-99% H2O Vapor= 0.0-4.0%Ar= 1% CO2= 0.03%Trace Gases= 0.01%
Particulate Matter: mixture of solids & aerosols dust, water droplets, smoke, ash, wind erosion
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What keeps the atmosphere around the Earth?
GRAVITY!!!
FACT: 80-90% of the atmosphere is found in the Troposphere..
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Sources of Atmospheric Gases and Particulate Matter
Natural vs.
VolcanoesForest FiresPlants Decaying PlantsLandscape SoilOceans
Anthropogenic
Fossil FuelsTransportationPower plantsIndustrial
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What do you think…Has the concentration of gases
changed over time??
Yes, concentration of gases have changed over time and vary form
place to place.
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In Class Activity
Write a short response.. How was the atmosphere
formed???
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Scientific Literacy • Where would you look to find the
answer??• Reliable Scientific Source• http://astrobiology.nasa.gov/ask-
an-astrobiologist/intro/
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The air around you importance of atmosphere
• Makes Earth suitable for life • Moderates Temperature• Water• Keeps out harmful rays from sun & space
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HOMEWORK
• Review notes and text pages 280-288
• Quiz Tomorrow
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Homework
•Read text p. 286-296•Write a short response..
How was the atmosphere formed???