Good Morning!Get to work SILENTLY and
INDEPENDENTLY on your warm up.
I should not see any backpacks on the floor/your lab table/behind you.
THANKS! DUE TO FORMATIVE TESTING, YOUR QUIZ HAS BEEN BUMPED TO
MONDAY, 9/24. HAPPY TUESDAY!
Write this down on your guided notes!• LEQ #3 How do variations
in air pressure cause different weather patterns to occur?
Quick Review!
• Air Pressure – The weight of the earth’s atmosphere pushing down on everything around it.
ATMOSPHERE
EARTH
Quick Review – Chemical Composition of the Atmosphere
• 78% Nitrogen
• 21% Oxygen
• 1% Argon & Carbon Dioxide
Quick Review
•Weather occurs in the TROPOSPHERE.
So what is all this pressure business?
• Soda can demonstration
Conclusion WHY did this happen?
• Water inside the can was heated, turned to water vapor (gas.) All of the pressure was forced out of the can.
• The pressure OUTSIDE the can was greater than the pressure INSIDE the can, causing it to implode.
Guided Notes - Pressure & Weather
• Air molecules are in constant motion and are affected by gravity. The force of this motion causes air pressure.
Guided Notes - Pressure & Weather
• High Pressure: Clear and dry conditions, usually sunny.
Guided Notes - Pressure & Weather
• Low Pressure: Causes storms, hurricanes and tornados.
Think, Pair, Share
•What type of weather system is over Charlotte today?
Guided Notes - Pressure & Weather
•When temperatures are HIGH, air pressure is usually LOW.
Warm air is usually LESS
dense than cool air.