4th Grade-Ch. 7 Lesson 2 What are tornadoes

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4th Grade-Ch. 7 Lesson 2 What are tornadoes

  1. 1. Ch. 7 Lesson 2 What are tornadoes?
  2. 2. funnel cloud <ul><li>rapidly spinning column of air that comes down out of a thunderstorm </li></ul>
  3. 3. how tornadoes form <ul><li>forms in thunderstorm </li></ul><ul><li>air in thunderstorm spins & tilts </li></ul><ul><li>narrow column of air inside becomes funnel shaped </li></ul><ul><li>funnel touches ground </li></ul>
  4. 4. How tornadoes form
  5. 5. tornadoes: <ul><li>Most occur in spring & summer </li></ul><ul><li>Winds from 200-500 kmh </li></ul><ul><li>Center of low air pressure </li></ul>
  6. 6. vortex <ul><li>area where air or liquid spins in circles </li></ul>
  7. 8. waterspout <ul><li>rapidly spinning column of air over a lake or ocean </li></ul><ul><li>weaker than tornado </li></ul>
  8. 9. Waterspouts 0:22
  9. 10. dust devil <ul><li>column of whirling air </li></ul><ul><li>not a tornado </li></ul>
  10. 11. dust devils not part of thunderstorms can form when skies are clear
  11. 12. What are tornadoes? dust devil severe storm
  12. 13. Doppler radar <ul><li>instrument used to look inside thunderstorm </li></ul><ul><li>direction, speed of wind, vortex of tornado </li></ul>
  13. 14. Fujita scale <ul><li>uses damage & wind speed to classify tornadoes </li></ul>
  14. 15. tornado watch <ul><li>tornadoes are likely to form within a few hours </li></ul>?
  15. 16. tornado warning <ul><li>tornado has been detected </li></ul>! Take cover in a safe location.
  16. 17. hurricane tornado
  17. 18. hurricane tornado Has an eye Winds At least 119 kmh Bigger than tornado Forms over warm, ocean water Days of warning Has no funnel Could create floods Do not tilt Create storm surge Forms on land No eye Can appear in midwest Lasts a few minutes Smaller Has a vortex Can be found inside hurricanes Does not form over water Has funnel shape Strong, high winds Deadly Low air pressure Can have different categories Spinning Dangerous storms
  18. 19. hurricane tornado <ul><li>destructive storms </li></ul><ul><li>thunderstorm </li></ul><ul><li>strong winds </li></ul><ul><li>larger </li></ul><ul><li>slower wind speed </li></ul><ul><li>warm, ocean water </li></ul><ul><li>days warning </li></ul><ul><li>more rain </li></ul><ul><li>smaller </li></ul><ul><li>faster wind speed </li></ul><ul><li>land </li></ul><ul><li>minutes warning </li></ul><ul><li>less rain </li></ul>
  19. 20. Name that picture
  20. 21. waterspout
  21. 22. Doppler radar
  22. 23. Fujita scale
  23. 24. dust devil
  24. 25. funnel cloud
  25. 26. vortex
  26. 27. Tornado Alley
  27. 28. Tornado Warning! Take cover in a safe location.

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