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SCIENCE NEWS. Atmosphere Layers by Height. What are the distinct properties of the Atmosphere?. Temperature Air Pressure Humidity. What is Temperature?. The measure of the average kinetic energy of the particles in a material. How is Temperature Measured?. - PowerPoint PPT PresentationTRANSCRIPT
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SCIENCE NEWS
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Atmosphere Layers by Height
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What are the distinct properties of the
Atmosphere? Temperature Air Pressure Humidity
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What is Temperature?
The measure of the average kinetic energy of the particles in a material
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How is Temperature Measured?
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Temperature in the atmosphere decreases
when altitude increases
What is the relationship between temperature and the atmospheric layers?
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TEMPERATURE INVERSION
In the TROPOSPHERE
there is an exception.
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Over a localize region, an increase in temperature occurs with an increase in
altitude.
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Effects … FOG
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Chicago
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What is Air Pressure?
Pressure exerted on a surface by the weight of the atmosphere
above the surface
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How is air pressure measured?
Barometer units of
millibars (mb)
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Air pressure in the atmosphere decreases when altitude increases
What is the relationship between air pressure and the atmospheric layers?
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Density
Remember the candy model?
What does the different size candies
represent?
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Density: The mass of a material in a unit volume.
In the atmosphere because atoms & molecules become farther apart as altitude increase… the density of air decreases with increasing
altitude.
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HOMEWORK
Read text p 289-292
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ANY QUESTIONS?
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SCIENCE NEWS
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What is Humidity?
The amount of water vapor in the atmosphere at a given location on the
Earth’s surface.
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1. Relative Humidity
2. Dew Point
Commonly described in two
ways..
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THE AMOUNT OF WATER VAPOR IN THE AIR RELATIVE TO THE AMOUNT OF WATER VAPOR NEEDED TO
REACH SATURATION
1. Relative Humidity
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EXPRESSED AS A PERCENTAGEMeasured by a …
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Relative Humidity decreases with increasing temperature.
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2. Dew Point
expressed as temperature which air
must be cooled at constant pressure to
reach saturation
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Dew Point Chart
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RELATIVE HUMIDITY & DEW POINT TALKS
ABOUT SATURATION. WHAT IS SATURATION? A condition where any
addition of water vapor to an air mass leads to
condensation
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Relationship between Temperature, Dew Point &
Humidity Activity:
Suomi Virtual Museum
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Humidity in the atmosphere depends
upon on evaporation & condensation
What is the relationship between
humidity and the atmosphere?
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LATENT HEAT
What is released when water vapor
condenses?
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The extra thermal energy contained in water vapor compared to liquid water.
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Within Each Layer
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Let’s combine all the properties of the
atmosphere… altitude,
temperature, air pressure, humidity
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Review The Troposphere Temperature
decreases with altitude
Air pressure decreases significantly
Weather & Clouds
The Stratosphere Temperature
increases with altitude
Air pressure decreases rapidly
Ozone Layer, Weather Balloons & Jet planes
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Mesosphere Temperature
decreases Air pressure
steadily decreasing
Meteors burn up & Rounding rockets
Thermosphere Temperature
increases sharply then steady extreme heat
Air pressure negligible
Space shuttle Orbits & Auroras
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Read Text p 297-303
From these pages formulate two
questions
HOMEWORK
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ANY QUESTIONS?