1. AIM: Explain the main feature of air pressure
AIM: Explain the main feature of air pressure. OBJ: Given notes and activity sheet SWBAT explain the main features of air pressure with 70% accuracy DN: Copy notes; HW check- Air Around You Booklet ACT: Text, read p Complete Air Pressure Booklet HW: Complete Air Pressure Booklet; Work on Meteorology Activity Sheet; Exam Oct 28.

2. Cold = molecules slower, closer together (contract); denser (heavier), sinks Hot/Warm = molecules faster, farther apart (expands); less dense (lighter), rises

3. Air Pressure Notes Pressure (P): P = F x A
Force (F) = push/pull; Area (A) = L x W = surface
Cold = sinks, more dense; high pressure at surface;
clear sky, dry, fair (nice) sunny weather.
Warm = rises (like a hot air balloon), less dense;
low pressure at surface; carries moisture; cloudy; precipitation (rain, snow), bad weather.
Instrument: barometer
Units: inches, mb
Pressure vs. Altitude:
Increase altitude ~ decrease pressure
Sea level = 1 atmosphere of pressure

4. Moist, Wet, Humid Clouds; Precipitation Dry; Clear Sky; Sunny
High Pressure
Wind
Low Pressure

5. Air Pressure
Low Density
High Density

6. Air Pressure