Review for the Ch. 23 Quiz 1.Layers of the Atmosphere 2.How do scientists divide the layers of the atmosphere? 3.In which Layer is most ozone found?

Quiz Review 1.By what process is water added to the atmosphere? 2.What does a barometer measure? 3.Aerosol sprays are most harmful to which layer of the atmosphere? 4.Why are these sprays banned?

5.Know the difference between conduction, radiation, and convection. 6.What causes pressure differences in the atmosphere? 7.Where is the atmospheric pressure highest? 8.Where is the atmospheric pressure lowest? 9.How do winds move in relationship to pressure differences?

Add arrows to the dashed lines to indicate the direction of the wind current on a hot afternoon. Ocean Land

Add arrows to the dashed lines to indicate the direction of the wind current on a hot afternoon. Ocean Land

Ch. 24 Water in the Atmosphere

24.1 Atmospheric Moisture

Humidity The amount of water vapor in the atmosphere. What did the term saturated mean?

Discuss with your table group… How does humidity affect wood? Think about both high humidity compared to low humidity.

Humidity Relative Humidity Mass of water vapor in air mass of water vapor that the air can hold What device measures Relative Humidity? Psychrometer Hair hygrometer

Specific Humidity Actual amount of moisture in the air. Grams of water in 1 kg of air.

Dew Point The temperature to which air must be cooled to reach saturation.

24.2 Clouds and Fog Cloud Formation Occurs when water vapor condenses into liquid water droplets. Convective Cooling Forceful Lifting Temperature Changes Advective Cooling

Classification of Clouds Stratus: sheet like, layered clouds Cumulus: puffy vertical clouds Cirrus: highest clouds in the sky, wispy

Fog Explain what happens on a molecular level when someone says, “The fog burned off today.”

Fog 4 Types 1.Radiation fog 2.Advection fog 3.Upslope fog 4.Steam fog

What does each type of fog formation have in common?

24.3 Precipitation Any moisture that falls to Earth's Surface.

Causes of Precipitation Coalescence: combining of water droplets as they are suspended in air Supercooling: Water in air solidifies in super cooled air cells, but doesn't fall due to too few condensation nuclei.