Presentation1
Transcript of Presentation1
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Weather and Climate
By: Tyler Laurain
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7th grade science standards
E.ES.07.72- Describe how different weather occurs due to the constant motion from the atmosphere.
E.ES.07.74- Describe weather conditions associated with frontal boundaries and movement of major air masses and the jet stream across North America using a weather map.
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WeatherCondition of the air on earth
The sun determines our weather
Water evaporates into the air
Causes our air to rise
Fronts and Air Masses
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Air MassesLarge body of air
Have similar properties
Can be tracked over time
Gives us clues to future weather
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Air MassesDifferent air masses don’t usually mix
Boundary, or front, forms between masses
Stormy weather often occurs along fronts
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Cold FrontsCold air moves into warm air
The cold air becomes more dense
Pushed under warm air
Cumulus clouds and showers occur
Winds change directions, temperature drops
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Cold Fronts
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Warm FrontsWarm air moves into cold air
Pushed above cold air
Cirrus and possibly stratus clouds form
Some participation, rain or snow
Air pressure and temperature rise
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Warm Front
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Stationary FrontSometimes air masses don’t
move
Variety of weather occurs
Usually clouds with light precipitation
Dissipate after several days
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Stationary Fronts
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QuestionsWhat is an air mass?
What happens in a cold front?
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High Pressure Area’sShown by “H” symbols
Pressure is greater then surrounding areas
Air pressure difference results in wind
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Low Pressure Area’sShown by “L” symbols
Winds blow into low pressure zones
Incoming winds cause clouds and precipitation
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Using a Weather MapRed arrows are warm fronts
Blue arrows are cold fronts
“H” high pressure zones
“L” low pressure zones
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Weather Map
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Predicting WeatherMeteorologists monitor weather
conditions
Sample wide network of weather stations
Satellite images
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Predicting WeatherPredict with great deal of
accuracy
Weather moves from west to east
Geographic conditions can affect local weather
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CreditsAxel Rouvin, CG lightning strike,
January 18th 2007, Attribution
NOAA, Weather Map, December 14th 2003, Public Domain
Lisa Gardiner, Windows To The Universe, September 30th 2010, Attribution Share-Alike
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CreditsWikimedia, Weather Map
Symbols, September 30th 2010, Attribution Share-Alike