Chapter 16 Understanding Weather Section 1  Water in the Air
Weather <ul><li>Condition of the atmosphere at a particular time and place </li></ul>
Water Cycle <ul><li>Continuous movement from sources such as lakes and oceans into the air </li></ul>
Condensation <ul><li>Water vapor cools and changes back to liquid droplets </li></ul>
Precipitation <ul><li>When rain, snow, sleet or hail falls from the clouds </li></ul>
Runoff  <ul><li>Water usually from precipitation that flows across land </li></ul>
Transpiration <ul><li>Process in which plants release water vapor into the air </li></ul>
Evaporation <ul><li>Liquid water changes into water vapor </li></ul>
Humidity <ul><li>The amount of water vapor or moisture in the air </li></ul>
Relative Humidity <ul><li>The amount of moisture the air contains compared with the maximum amount it can hold </li></ul>
Psychrometer <ul><li>Instrument used to measure relative humidity </li></ul>
Condensation <ul><li>Process by which a gas becomes a liquid </li></ul>
Dew Point <ul><li>The temperature at which air must cool to be completely saturated </li></ul>
Cloud <ul><li>A collection of millions of tiny water droplets or ice crystals </li></ul>
Cumulus Clouds <ul><li>Puffy white clouds with flat bottoms </li></ul>
Stratus Clouds <ul><li>Clouds that form in layers </li></ul>
Cirrus Cloud <ul><li>Thin feathery, white clouds at high altitudes </li></ul>
 
Precipitation <ul><li>Water in solid or liquid form that falls to the Earth </li></ul>
Snow <ul><li>Solid precipitation </li></ul>
Sleet <ul><li>Freezing rain </li></ul>
Hail <ul><li>Solid precipitation that falls as balls </li></ul>
Rain Gauge <ul><li>An instrument for measuring the amount of rainfall </li></ul>
1) Cloud that forms in layers 2) Puffy, white cloud with a flat bottom 3) Cloud that forms near the ground 4) Cloud that p...
Chapter 16 Understanding Weather Section 2 Air Masses and Fronts
Air Mass <ul><li>A large body of air that has similar temperature and moisture throughout </li></ul>
Cold Air Masses <ul><li>3 North American Polar air masses </li></ul><ul><ul><li>Develop over land </li></ul></ul><ul><ul><...
Warm Air Masses <ul><li>4 North American Polar warm air masses </li></ul><ul><ul><li>Develop over the Desert region of Mex...
 
Front <ul><li>Boundary formed when two different air masses meet </li></ul>
Cold Front <ul><li>When a cold air mass meets and displaces a warm air mass </li></ul>
Warm Front <ul><li>When a warm air mass meets and overrides a cold air mass </li></ul>
Occluded Front <ul><li>Faster moving cold front overtakes a slower moving cold front </li></ul>
Stationary Front <ul><li>When a Cold air mass meets a Warm air mass and little movement occurs </li></ul>
Where do the air masses that are responsible for cold, winter weather in the United States come from? Canada, the North At...
Chapter 16 Understanding Weather Section 3 Severe Weather
Severe Weather <ul><li>Weather that can cause property damage or even death  </li></ul>
Thunderstorms <ul><li>Small intense weather systems that produce strong winds, heavy rain, lightning & thunder </li></ul>
Lightning <ul><li>Large electrical discharge that occurs between two opposite charged surfaces </li></ul>
How Lightning Forms
Thunder <ul><li>The sound that results from the rapid expansion of air along the lightning strike </li></ul>
Severe Thunderstorms <ul><li>Severe thunderstorms produce one or more of the following conditions </li></ul><ul><ul><li>Hi...
Tornado <ul><li>Small rotating column of air that has high speeds and low central pressure that touches the ground. </li><...
 
Hurricane  <ul><li>Large rotating tropical storm with wind speeds at least 119km/hr. </li></ul>
Hurricane Eye wall <ul><li>Cumulonimbus clouds that produce heavy rains & forceful winds </li></ul>
Hurricane Eye <ul><li>Center of the hurricane.  </li></ul>
Rain Bands <ul><li>Spiraling bands of clouds </li></ul>
Name three examples of severe weather Thunderstorms, hurricanes, and tornadoes What is the relationship between a funnel c...
Hurricanes that form over the western Pacific Ocean are called __________, while those that begin in the Indian Ocean are ...
Chapter 16 Understanding Weather Section 4  Forecasting the Weather
Weather Forecast <ul><li>A prediction of weather conditions over the next 3 to 5 days </li></ul>
Thermometer <ul><li>A tool used to measure air temperature </li></ul>
Barometer <ul><li>An instrument used to measure air pressure </li></ul>
Windsock or Wind Vane <ul><li>The wind enters through the wide end and exits through the narrow end. Therefore the wide en...
Anemometer <ul><li>An instrument used to measure wind speed </li></ul>
Weather Balloons <ul><li>Measure weather conditions as high as 30 km above earth </li></ul>
Radar <ul><li>Used to find the location, movement and intensity of precipitation </li></ul>
 
Weather Satellites <ul><li>Orbit the Earth and provide weather information that can not be obtained from the ground </li><...
Station Model <ul><li>A small circle showing the location of a weather station along with a set of symbols and numbers sur...
 
Isobars <ul><li>Lines that connect points of equal air pressure </li></ul>
What is the name of the tool used to measure each atmospheric condition. Wind Direction Air Pressure Air Temperature Wind ...
References <ul><li>http://www.homeschoollearning.com/units/unit_09-17-01.shtml   </li></ul><ul><li>http://www.joyner-ranch...
References <ul><li>http://www. essc . psu . edu /~ dbabb /Class_Extras.html   </li></ul><ul><li>http://www.mdrusa.net/Webp...
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OLM Science6_16

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Sixth Grade, Chapter 16

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  1. 1. Chapter 16 Understanding Weather Section 1 Water in the Air
  2. 2. Weather <ul><li>Condition of the atmosphere at a particular time and place </li></ul>
  3. 3. Water Cycle <ul><li>Continuous movement from sources such as lakes and oceans into the air </li></ul>
  4. 4. Condensation <ul><li>Water vapor cools and changes back to liquid droplets </li></ul>
  5. 5. Precipitation <ul><li>When rain, snow, sleet or hail falls from the clouds </li></ul>
  6. 6. Runoff <ul><li>Water usually from precipitation that flows across land </li></ul>
  7. 7. Transpiration <ul><li>Process in which plants release water vapor into the air </li></ul>
  8. 8. Evaporation <ul><li>Liquid water changes into water vapor </li></ul>
  9. 9. Humidity <ul><li>The amount of water vapor or moisture in the air </li></ul>
  10. 10. Relative Humidity <ul><li>The amount of moisture the air contains compared with the maximum amount it can hold </li></ul>
  11. 11. Psychrometer <ul><li>Instrument used to measure relative humidity </li></ul>
  12. 12. Condensation <ul><li>Process by which a gas becomes a liquid </li></ul>
  13. 13. Dew Point <ul><li>The temperature at which air must cool to be completely saturated </li></ul>
  14. 14. Cloud <ul><li>A collection of millions of tiny water droplets or ice crystals </li></ul>
  15. 15. Cumulus Clouds <ul><li>Puffy white clouds with flat bottoms </li></ul>
  16. 16. Stratus Clouds <ul><li>Clouds that form in layers </li></ul>
  17. 17. Cirrus Cloud <ul><li>Thin feathery, white clouds at high altitudes </li></ul>
  18. 19. Precipitation <ul><li>Water in solid or liquid form that falls to the Earth </li></ul>
  19. 20. Snow <ul><li>Solid precipitation </li></ul>
  20. 21. Sleet <ul><li>Freezing rain </li></ul>
  21. 22. Hail <ul><li>Solid precipitation that falls as balls </li></ul>
  22. 23. Rain Gauge <ul><li>An instrument for measuring the amount of rainfall </li></ul>
  23. 24. 1) Cloud that forms in layers 2) Puffy, white cloud with a flat bottom 3) Cloud that forms near the ground 4) Cloud that produces thunderstorms 5) Cloud that produces light, continuous rain 6) Thin, feathery, high-altitude cloud A) Fog B) Nimbostratus C) Stratus D) Cirrus E) Cumulonimbus F) Cumulus C F A E B D
  24. 25. Chapter 16 Understanding Weather Section 2 Air Masses and Fronts
  25. 26. Air Mass <ul><li>A large body of air that has similar temperature and moisture throughout </li></ul>
  26. 27. Cold Air Masses <ul><li>3 North American Polar air masses </li></ul><ul><ul><li>Develop over land </li></ul></ul><ul><ul><li>Develop over the Atlantic Ocean </li></ul></ul><ul><ul><li>Develop over the Pacific Ocean </li></ul></ul>
  27. 28. Warm Air Masses <ul><li>4 North American Polar warm air masses </li></ul><ul><ul><li>Develop over the Desert region of Mexico </li></ul></ul><ul><ul><li>Develop over the Atlantic Ocean </li></ul></ul><ul><ul><li>Develop over the Pacific Ocean </li></ul></ul><ul><ul><li>Gulf of Mexico </li></ul></ul>
  28. 30. Front <ul><li>Boundary formed when two different air masses meet </li></ul>
  29. 31. Cold Front <ul><li>When a cold air mass meets and displaces a warm air mass </li></ul>
  30. 32. Warm Front <ul><li>When a warm air mass meets and overrides a cold air mass </li></ul>
  31. 33. Occluded Front <ul><li>Faster moving cold front overtakes a slower moving cold front </li></ul>
  32. 34. Stationary Front <ul><li>When a Cold air mass meets a Warm air mass and little movement occurs </li></ul>
  33. 35. Where do the air masses that are responsible for cold, winter weather in the United States come from? Canada, the North Atlantic Ocean & the North Pacific Ocean What is the weather like at a front? Cloudy and stormy When a warm air mass overrides a cold air mass a __________ forms. warm front
  34. 36. Chapter 16 Understanding Weather Section 3 Severe Weather
  35. 37. Severe Weather <ul><li>Weather that can cause property damage or even death </li></ul>
  36. 38. Thunderstorms <ul><li>Small intense weather systems that produce strong winds, heavy rain, lightning & thunder </li></ul>
  37. 39. Lightning <ul><li>Large electrical discharge that occurs between two opposite charged surfaces </li></ul>
  38. 40. How Lightning Forms
  39. 41. Thunder <ul><li>The sound that results from the rapid expansion of air along the lightning strike </li></ul>
  40. 42. Severe Thunderstorms <ul><li>Severe thunderstorms produce one or more of the following conditions </li></ul><ul><ul><li>High winds </li></ul></ul><ul><ul><li>Hail </li></ul></ul><ul><ul><li>Flash Floods </li></ul></ul><ul><ul><li>Tornadoes </li></ul></ul>
  41. 43. Tornado <ul><li>Small rotating column of air that has high speeds and low central pressure that touches the ground. </li></ul>
  42. 45. Hurricane <ul><li>Large rotating tropical storm with wind speeds at least 119km/hr. </li></ul>
  43. 46. Hurricane Eye wall <ul><li>Cumulonimbus clouds that produce heavy rains & forceful winds </li></ul>
  44. 47. Hurricane Eye <ul><li>Center of the hurricane. </li></ul>
  45. 48. Rain Bands <ul><li>Spiraling bands of clouds </li></ul>
  46. 49. Name three examples of severe weather Thunderstorms, hurricanes, and tornadoes What is the relationship between a funnel cloud and a tornado? A funnel cloud is called a tornado when it makes contact with the Earth’s surface.
  47. 50. Hurricanes that form over the western Pacific Ocean are called __________, while those that begin in the Indian Ocean are called ___________. Typhoons – Cyclones Which type of a cloud would most likely lead you to predict a thunderstorm? a cumulonimbus cloud
  48. 51. Chapter 16 Understanding Weather Section 4 Forecasting the Weather
  49. 52. Weather Forecast <ul><li>A prediction of weather conditions over the next 3 to 5 days </li></ul>
  50. 53. Thermometer <ul><li>A tool used to measure air temperature </li></ul>
  51. 54. Barometer <ul><li>An instrument used to measure air pressure </li></ul>
  52. 55. Windsock or Wind Vane <ul><li>The wind enters through the wide end and exits through the narrow end. Therefore the wide end points toward the wind. </li></ul>
  53. 56. Anemometer <ul><li>An instrument used to measure wind speed </li></ul>
  54. 57. Weather Balloons <ul><li>Measure weather conditions as high as 30 km above earth </li></ul>
  55. 58. Radar <ul><li>Used to find the location, movement and intensity of precipitation </li></ul>
  56. 60. Weather Satellites <ul><li>Orbit the Earth and provide weather information that can not be obtained from the ground </li></ul>
  57. 61. Station Model <ul><li>A small circle showing the location of a weather station along with a set of symbols and numbers surrounding it that represent weather data </li></ul>
  58. 63. Isobars <ul><li>Lines that connect points of equal air pressure </li></ul>
  59. 64. What is the name of the tool used to measure each atmospheric condition. Wind Direction Air Pressure Air Temperature Wind Speed Windsock/Wind vane Barometer Thermometer Anemometer
  60. 65. References <ul><li>http://www.homeschoollearning.com/units/unit_09-17-01.shtml </li></ul><ul><li>http://www.joyner-ranch.com/html/weather </li></ul><ul><li>http://www.wasatchicewater.com/product.asp </li></ul><ul><li>http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml </li></ul><ul><li>http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml </li></ul><ul><li>http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml </li></ul><ul><li>http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml </li></ul><ul><li>http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml </li></ul><ul><li>http://www.tempright.com/products.htm </li></ul><ul><li>http://www.vaisala.com/Weather/archive/2004/03/11 </li></ul><ul><li>http://jefferson.unl.edu/Burning/Forecast.htm </li></ul><ul><li>http://jefferson.unl.edu/Burning/Forecast.htm </li></ul><ul><li>http://www.ces.purdue.edu/pork/clipart/house.htm </li></ul><ul><li>http://www.westseneca.wnyric.org </li></ul><ul><li>http://schools.fcps.org/wfms/ziniewicz/clouds/cloud84.html </li></ul><ul><li>http://www.weatherworks.com/cool_clouds.html </li></ul><ul><li>http://www.evsc.virginia.edu/~evscta/EVSC250/clouds.html </li></ul><ul><li>http://www.capetownskies.com/clouds-high.htm </li></ul><ul><li>http://www.windows.ucar.edu/earth/images </li></ul><ul><li>h ttp ://www. webskite .com/weather-seminar/hazards/ice. htm </li></ul><ul><li>http://www.s-t.com/daily/12-96/12-28-96/a03wn028.htm </li></ul><ul><li>http://www.cltskywarn.org/svrwxrelated.htm </li></ul><ul><li>http://www.atmospheric-violence.com/   </li></ul>
  61. 66. References <ul><li>http://www. essc . psu . edu /~ dbabb /Class_Extras.html </li></ul><ul><li>http://www.mdrusa.net/Webpdr/pdrhailknowledgebase.htm </li></ul><ul><li>http://www.aninoquisi.com/rain_gauge.htm </li></ul><ul><li>http://www.harcourtschool.com/scienceglossary/define/gr5/air_mass5.html </li></ul><ul><li>http://www.beeville.net/Weather </li></ul><ul><li>http://www.geocities.com/five_six_crew/news.htm </li></ul><ul><li>http://www.wdtv.com/weather/images/Weather_Review/Air%20Masses%20and%20Fronts.htm </li></ul><ul><li>http://www.wdtv.com/weather/images/Weather_Review/Air%20Masses%20and%20Fronts.htm </li></ul><ul><li>http://www.wdtv.com/weather/images/Weather_Review/Air%20Masses%20and%20Fronts.htm </li></ul><ul><li>http://www.lawngeese.com/phptest/images?sortby=2 </li></ul><ul><li>http://student.science.uva.nl/~skowalcz/physics </li></ul><ul><li>http://crux.baker.edu/csaraf01/WEB111A/project/main.htm </li></ul><ul><li>http://www.xbox100.com/forums/showthread.php?s=&threadid=9223 </li></ul><ul><li>http://www.ahoycaptain.com/shop/weemsplath_550700_barometer.html </li></ul><ul><li>http://carolyn.socklabs.com/ </li></ul><ul><li>http:// cwet . http://solar. calvin . edu /performance/wind_speed. php </li></ul><ul><li>nic.in/WRA.htm </li></ul><ul><li>www.harcourtschool.com/.../weather_b6c.html </li></ul><ul><li>http://www.stolaf.edu/other/cegsic/itase/images/traverse_2001/pages/weather_balloon4.html </li></ul><ul><li>http://www.sierraphotography.com/wxnotes </li></ul><ul><li>http://abclocal.go.com/kfsn/weather </li></ul><ul><li>http://www.phys.unsw.edu.au/~map/weather/notes/noaa_sats.html </li></ul><ul><li>http://www.californiaspaceauthority.org/html/visions-from-above/weather.html </li></ul><ul><li>http://members.hmcltd.net/rosen </li></ul><ul><li>http://www.eos.ubc.ca/courses/atsc201/BrooksCole/MetSciEngr/satellite.html </li></ul><ul><li>http://www.geog.ubc.ca/weather/wd_index.html </li></ul>

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