Air Pressure and Weather

Air Pressure and Weather

Vanilla Ice, Ice, Baby, too cold...

Learning Objective:

• We will identify how global patterns of atmospheric movement influence local weather using weather maps that show high and low pressures and fronts.

Weather Instruments

Ways to Measure Our Weather

Barometer

Measures air pressure.

Anemometer

Measures wind speed.

Rain Gauge

Measures the amount of rain that has fallen over a specific time period.

Sling Psychrometer

Measures the relative humidity of the air.

Thermometer

Measures the temperature of the air.

Weather Balloon

An instrument sent into the atmosphere to provide information about the weather.

Wind Vane

Determines the direction from which the wind is blowing.

Radar

Used to detect rain, snow, or other forms of precipitation.

Multiple Choice

What weather instrument measures air pressure?

• Anemometer

• Barometer

• Thermometer

Multiple Choice

What weather instrument measures air temperature?

• Thermometer

• Sling Psychrometer

• Anemometer

Multiple Select

What two instruments measure the wind?

• Anemometer

• Barometer

• Rain Gauge

• Wind Vane

Multiple Choice

What weather instrument measure humidity in the air?

• Wind Vane

• Weather Balloon

• Sling Psychrometer

Multiple Choice

What weather instruments measures precipitation?

• Rain Gauge

• Radar

• Weather Balloon

Poll

What weather instrument do you like best?

• Weather Balloon

• Radar

Weather Symbols

Because Scientists are Lazy

Weather Symbols

What do you notice?

Precipitation

• Rain – liquid precipitation in the form of water drops that falls from clouds.

• Snow – precipitation that is made up of ice crystals.

• Sleet – solid precipitation in form of ice pellets.

• Hail – frozen spheres of precipitation; much larger than sleet pellets.

The Sun vs. Clouds

• Sunny – very few clouds in the sky.

• Partly Cloudy – more sun than clouds.

• Cloudy – thick cloud cover that blocks the sun.

Weather Fronts

• Warm Front – The boundary between two air masses where a warm air mass is replacing a cold air mass.

• Cold Front – The boundary between two air masses where a cold air mass is replacing a warm air mass.

• Stationary Front – a pair of air masses, neither of which is strong enough to replace the other; moves very slowly.

• Occluded Front – a combination of two fronts that forms when a cold front catches up and overtakes a warm front.

Weather Front Symbols

What do you notice?

Pressure Systems

• High Pressure System – pressure that brings clear, sunny skies, cooler temperatures, and calm weather; represented by the symbol “H” on a weather map.

• Low Pressure System – pressure that brings cloudy skies, warmer temperatures, and precipitation; represented by the symbol “L” on a weather map.

Weather Maps

What do you notice?

Open Ended

Describe what weather happened in Boston last night (use as many vocabulary words as you can):

Poll

Did you learn more about the weather during this lesson?

• Yes.

• No.

• Yes, and I want to learn more!

• No, I already knew this.

Poll

Are you ready the be a Meteorologist?

• Yes.

• No.

• I need more information.

Open Ended

I can make this less better by:

Open Ended

Do you have any other questions? (If you post them here, don't forget to put them in your Jamboard!)