Air masses ashley

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Air masses ashley

  1. 1. Air Masses and Weather Fronts
  2. 2. Air Masses <ul><li>EQ: How do meteorologists use air masses and weather fronts to predict our weather? </li></ul>http://www.weatherquestions.com/What_is_an_air_mass.htm
  3. 3. Warm Up <ul><li>Think back to the recent snow storm we had where we were out of school for one week. </li></ul><ul><li>Which type of air mass do you think caused the snow and why do you think this way? </li></ul>
  4. 4. <ul><li>http://www.weatherquestions.com/What_is_an_air_mass.htm </li></ul>An air mass is a large body of air with similar temperature, pressure, and humidity levels throughout.
  5. 5. Air Masses <ul><li>Get their properties from spending many days, even weeks, over the same area. </li></ul><ul><ul><li>Example: If an air mass sits over an ocean for awhile, it becomes humid . </li></ul></ul><ul><ul><li>If an air mass sits over land , it becomes dry. </li></ul></ul>
  6. 6. Air Masses <ul><li>Four types of air masses </li></ul><ul><ul><li>Maritime </li></ul></ul><ul><ul><li>Continental </li></ul></ul><ul><ul><li>Polar </li></ul></ul><ul><ul><li>Tropical </li></ul></ul>
  7. 7. Air Masses <ul><li>Continental </li></ul><ul><li>Maritime </li></ul><ul><li>Form over land and are dry </li></ul><ul><li>Form over water and are moist </li></ul>
  8. 8. Air Masses <ul><li>Tropical </li></ul><ul><li>Form over the tropics (low latitudes) </li></ul><ul><li>Warm/Hot </li></ul><ul><li>Polar </li></ul><ul><li>Form at the polar regions of Earth (high latitudes) </li></ul><ul><li>Cool/Cold </li></ul>
  9. 10. Air masses <ul><li>Why does our weather change? </li></ul><ul><li>Air masses move! </li></ul><ul><li>How? </li></ul><ul><li>Global winds push air masses around the Earth! </li></ul>
  10. 11. Air Masses Reflect <ul><li>M- Describe the four types of air masses. </li></ul><ul><li>I- If you could become an air mass, which would you be and why? </li></ul><ul><li>U- Look back at the warm up question. Do you agree with your answer? Support your answer with details. </li></ul><ul><li>S- Create a flag for an air mass and explain why you chose that air mass. </li></ul>
  11. 12. Fronts <ul><li>A front is a place where two different air masses meet </li></ul><ul><li>Three main types </li></ul><ul><li>A “battle” between air masses </li></ul>Continental Polar Maritime Tropical FRONT
  12. 13. Cold Fronts <ul><li>Click for Animation </li></ul>
  13. 14. Cold Front <ul><li>Moves quickly and can produce thunderstorms </li></ul><ul><li>After it moves through, skies will be clear and temperatures will be cooler </li></ul>
  14. 15. Cold Front Reflect <ul><li>M- Explain the types of weather associated with a cold front. </li></ul><ul><li>I- Act out a cold front with a partner. </li></ul><ul><li>U- A cold front passed through last night. Predict what the weather is like now? </li></ul><ul><li>S- Create a metaphor: A cold front is </li></ul><ul><li>like a _______________________. Explain. </li></ul>
  15. 16. Warm Front <ul><li>Click for Animation </li></ul>
  16. 17. Warm Front <ul><li>Moves slower than cold fronts </li></ul><ul><li>Brings humid weather and sometimes rains for days </li></ul><ul><li>After it moves through, temperatures are warmer </li></ul>
  17. 18. Warm Front Reflect <ul><li>M- Restate the cause of a warm front. </li></ul><ul><li>I- Which type of front do you feel is the best and why? </li></ul><ul><li>U- Compare and contrast warm fronts and cold fronts. </li></ul><ul><li>S- What would it be like to be a warm front? </li></ul>
  18. 19. Stationary Front <ul><li>Click for Animation </li></ul>
  19. 20. Stationary Fronts <ul><li>Two air masses next to each other, but neither moves. </li></ul><ul><li>Weather remains the same for days </li></ul>
  20. 21. Stationary Front Reflect <ul><li>M- Summarize the three types of fronts. </li></ul><ul><li>I- You are charged with studying the effects of air masses and fronts. How would you do it? </li></ul><ul><li>U-Which type of front do you think is the most destructive and why? </li></ul><ul><li>S- Imagine you live in a world with only two types of air masses. How would that effect fronts? </li></ul>
  21. 22. Become the meteorologist! <ul><li>Use the weather map given to you and what you have learned about air masses and fronts and predict the weather for _______, _______,________,_______. Be sure to include an appropriate temperature and sky conditions (cloudy, sunny, raining, snowing, etc.) </li></ul>

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