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Presentation1

  1. 1. Weather and Climate <br />By: Tyler Laurain<br />
  2. 2. 7th grade science standards <br />E.ES.07.72- Describe how different weather occurs due to the constant motion from the atmosphere.<br />E.ES.07.74- Describe weather conditions associated with frontal boundaries and movement of major air masses and the jet stream across North America using a weather map.<br />
  3. 3. Weather<br />Condition of the air on earth<br />The sun determines our weather<br />Water evaporates into the air<br />Causes our air to rise<br />Fronts and Air Masses<br />
  4. 4. Air Masses<br />Large body of air<br />Have similar properties<br />Can be tracked over time<br />Gives us clues to future weather<br />
  5. 5. Air Masses<br />Different air masses don’t usually mix<br />Boundary, or front, forms between masses<br />Stormy weather often occurs along fronts<br />
  6. 6. Cold Fronts<br />Cold air moves into warm air<br />The cold air becomes more dense<br />Pushed under warm air<br />Cumulus clouds and showers occur<br />Winds change directions, temperature drops<br />
  7. 7. Cold Fronts<br />
  8. 8. Warm Fronts<br />Warm air moves into cold air<br />Pushed above cold air<br />Cirrus and possibly stratus clouds form<br />Some participation, rain or snow<br />Air pressure and temperature rise<br />
  9. 9. Warm Front<br />
  10. 10. Stationary Front<br />Sometimes air masses don’t move<br />Variety of weather occurs<br />Usually clouds with light precipitation<br />Dissipate after several days<br />
  11. 11. Stationary Fronts<br />
  12. 12. Questions<br />What is an air mass?<br />What happens in a cold front?<br />
  13. 13. High Pressure Area’s<br />Shown by “H” symbols<br />Pressure is greater then surrounding areas<br />Air pressure difference results in wind<br />
  14. 14. Low Pressure Area’s<br />Shown by “L” symbols<br />Winds blow into low pressure zones<br />Incoming winds cause clouds and precipitation <br />
  15. 15. Using a Weather Map<br />Red arrows are warm fronts<br />Blue arrows are cold fronts<br />“H” high pressure zones<br />“L” low pressure zones<br />
  16. 16. Weather Map<br />
  17. 17. Predicting Weather<br />Meteorologists monitor weather conditions<br />Sample wide network of weather stations<br />Satellite images <br />
  18. 18. Predicting Weather<br />Predict with great deal of accuracy <br />Weather moves from west to east<br />Geographic conditions can affect local weather<br />
  19. 19. Credits<br />Axel Rouvin, CG lightning strike, January 18th 2007, Attribution<br />NOAA, Weather Map, December 14th 2003, Public Domain<br />Lisa Gardiner, Windows To The Universe, September 30th 2010, Attribution Share-Alike <br />
  20. 20. Credits<br />Wikimedia, Weather Map Symbols, September 30th 2010, Attribution Share-Alike<br />

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