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APK - Activate Prior knowledge On Nearpod, list two resources you could use to find out about today’s weather forecast.

EQ: How do air masses produce weather systems? Read the EQ silently. Read the EQ aloud to a neighbor. Read the EQ to the ceiling. Read the EQ to the floor. What will you know at the end of class?

Lesson importance…WHY? Why do you need to know how air masses produce weather systems? Think… Share with you neighbors. Type your answer on Nearpod.

Air masses HUGE bodies of air Can form over water (wet) or land(dry) and in tropical or polar regions. The air mass takes on the characteristics of the area under it.

What is an air mass? A.) rain, sleet, snow, freezing rain, hail B.) tornado, thunderstorm, hurricane C.) cumulus, stratus, cirrus D.) HUGE bodies of air

Let’s fill in a bubble chart (left side) Temperature Humidity Maritime Tropical Continental Polar

Let’s fill in a bubble chart Temperature Humidity Maritime Tropical Continental Polar Forms over ocean-high humidity Forms over land-low humidity Warm Cold

4 Types of air masses 1.) Maritime Tropical (maritime=over water & tropical=warm) Occurs with warm H20 over Gulf of Mexico area Brings hot, humid weather & thunderstorms in summer Brings heavy snow or rain in the winter

STOP and tapple Time What does Maritime Tropical mean?

2. Maritime Polar Air Mass Maritime Polar (maritime=water & polar = cold) Occurs with cold H20 in West Coast of US Brings cool temperatures with fog & rain

STOP Which of the following is the BEST explanation of Maritime Polar Air Mass? A.) Maritime Polar (maritime = water & polar = cold) B.) Maritime Polar (maritime = water & polar = cold with cold H2O In the West Coast of US) C.) Maritime Polar (maritime=water & polar = cold) occurs with cold H20 in West Coast of US & Brings cool temperatures with fog & rain)

3) Continental Tropical Air Mass Continental= over land, Tropical=warm Only occurs in summer in SW USA & Northern Mexico Brings Hot, dry weather

STOP! On Nearpod fill in.. When a Continental Tropical Air Mass can occur Where is occurs What weather it brings

STOP! On Nearpod fill in.. When a Continental Tropical Air Mass can occur Where is occurs What weather it brings … Continental= over land, Tropical=warm Only occurs in summer in SW USA & Northern Mexico Brings Hot, dry weather

4) Continental Polar Air Mass Continental=over land, polar= cold Occurs in Central & North Canada & Alaska Clear, cold, dry air comes to North America

Humidity notes Humidity: amount of H20 vapor in the air. Temperature is important to humidity b/c the warmer the air, the more H20 vapor it can hold. Air is saturated when no more water vapor can enter the air.

stop What is humidity? **Pulling sticks

stop What is humidity? **Pulling sticks Humidity: amount of H20 vapor in the air.

Relative Humidity The amount of H20 vapor in the air COMPARED to the amount of H20 vapor needed to saturate the air at a given time. Measured with a sling psychrometer or Hygrometer……Recorded as a %

Sling Psychrometer Demonstration https://www.youtube.com/watch?v=Sxm6yq268Bc

Close: Using a tree map, write the characteristics of each type of air mass. Continental Polar

Close: Using a tree map, type the characteristics of each type of air mass Air Masses Continental Polar