Air Masses and Fronts Drill: Would you rather “Know Everything” or be able to “Figure Out Anything”? Why? Objective: SWBAT identify types of air masses.

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Presentation transcript:

Air Masses and Fronts Drill: Would you rather “Know Everything” or be able to “Figure Out Anything”? Why? Objective: SWBAT identify types of air masses in order to compare air masses and fronts. HW: 17-1 & 17-2 due Tuesday

Air Masses Four types of air masses: –Tropical: warm air from tropics –Polar: cold air from North. –Maritime: moist air produced over oceans. –Continental: dry air produced over land. What two characteristics do scientists use to classify air masses? Label Tropical/Polar as high or low pressure.

Which food is which? Maritime Polar Maritime Tropical Continental Polar Continental Tropical

Draw the movement of the mass.

Tornado Alley

Fronts

Drill Day 2 Drill: A cold moist air mass would be described as _________ ____________. Objective: SWBAT identify fronts in order to determine the weather they produce. HW: 17-1&17-2 due Tuesday

Feb. 4 th, Air Masses and Fronts Drill: Name the 4 types of fronts. –Which front results from a head on collision of cold and warm air and can result in short severe storms? Objective: SWBAT identify fronts in order to determine the weather they produce due Today

Air masses move creating fronts Front: Two or more air masses meet and do not mix. –Different temps and densities. –Can be km wide and 10 km upwards. Named after place where two opposing armies meet. How are these things related?

4 Types of Fronts Cold Fronts: Fast moving cold air strikes slow moving warm air forcing the warm air to rise. Warm Front: Slow moving warm air mass moves over a cold air mass funneling the air upwards. What kind of weather should these fronts bring?

Predictions Cold Front –Moist warm air forced upwards. Prediction: –Dry warm air forced upwards. Prediction –After Cold Front leaves, cool dry air moves in bringing in clear skies and cooler temps.

Predictions Warm Front –Warm humid air slowly moves over cold air. Prediction: –Dry warm air slowly moves over cold air. Prediction: Which type of front lasts longer Cold or Warm? Why?

Cold vs. Warm Front

2 More Fronts Stationary Fronts: Cold and warm air meets but neither has enough force to move the other. –Weather? Occluded Fronts: –Warm air is trapped between two cooler air masses. –They layer according to density and the cooler air can mix. –The warm air is cut off from escape causing it to cool and condense.

Cyclones Cyclone: A swirling center of low air pressure. –Spin counterclockwise in Northern hemisphere. –Bring storms and precipitation Anticyclone: High pressure centers of dry air. –Clockwise in the Northern hemisphere –Descending air brings dry, clear weather.

March 1 st. Tools of the Trade Drill: Collect 1 computer per team. –Open your power point. –Collect your “Tools of the Trade” lab. –Check to see if you answered all of the questions on the power point. Objective: Students will be able to identify and describe tools used in meteorology in order to interpret data and make weather predictions based on the data. HW: Lab due tomorrrow.