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OLM Science6_16



Sixth Grade, Chapter 16

Sixth Grade, Chapter 16



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OLM Science6_16 OLM Science6_16 Presentation Transcript

  • Chapter 16 Understanding Weather Section 1 Water in the Air
  • Weather
    • Condition of the atmosphere at a particular time and place
  • Water Cycle
    • Continuous movement from sources such as lakes and oceans into the air
  • Condensation
    • Water vapor cools and changes back to liquid droplets
  • Precipitation
    • When rain, snow, sleet or hail falls from the clouds
  • Runoff
    • Water usually from precipitation that flows across land
  • Transpiration
    • Process in which plants release water vapor into the air
  • Evaporation
    • Liquid water changes into water vapor
  • Humidity
    • The amount of water vapor or moisture in the air
  • Relative Humidity
    • The amount of moisture the air contains compared with the maximum amount it can hold
  • Psychrometer
    • Instrument used to measure relative humidity
  • Condensation
    • Process by which a gas becomes a liquid
  • Dew Point
    • The temperature at which air must cool to be completely saturated
  • Cloud
    • A collection of millions of tiny water droplets or ice crystals
  • Cumulus Clouds
    • Puffy white clouds with flat bottoms
  • Stratus Clouds
    • Clouds that form in layers
  • Cirrus Cloud
    • Thin feathery, white clouds at high altitudes
  • Precipitation
    • Water in solid or liquid form that falls to the Earth
  • Snow
    • Solid precipitation
  • Sleet
    • Freezing rain
  • Hail
    • Solid precipitation that falls as balls
  • Rain Gauge
    • An instrument for measuring the amount of rainfall
  • 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
  • Chapter 16 Understanding Weather Section 2 Air Masses and Fronts
  • Air Mass
    • A large body of air that has similar temperature and moisture throughout
  • Cold Air Masses
    • 3 North American Polar air masses
      • Develop over land
      • Develop over the Atlantic Ocean
      • Develop over the Pacific Ocean
  • Warm Air Masses
    • 4 North American Polar warm air masses
      • Develop over the Desert region of Mexico
      • Develop over the Atlantic Ocean
      • Develop over the Pacific Ocean
      • Gulf of Mexico
  • Front
    • Boundary formed when two different air masses meet
  • Cold Front
    • When a cold air mass meets and displaces a warm air mass
  • Warm Front
    • When a warm air mass meets and overrides a cold air mass
  • Occluded Front
    • Faster moving cold front overtakes a slower moving cold front
  • Stationary Front
    • When a Cold air mass meets a Warm air mass and little movement occurs
  • 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
  • Chapter 16 Understanding Weather Section 3 Severe Weather
  • Severe Weather
    • Weather that can cause property damage or even death
  • Thunderstorms
    • Small intense weather systems that produce strong winds, heavy rain, lightning & thunder
  • Lightning
    • Large electrical discharge that occurs between two opposite charged surfaces
  • How Lightning Forms
  • Thunder
    • The sound that results from the rapid expansion of air along the lightning strike
  • Severe Thunderstorms
    • Severe thunderstorms produce one or more of the following conditions
      • High winds
      • Hail
      • Flash Floods
      • Tornadoes
  • Tornado
    • Small rotating column of air that has high speeds and low central pressure that touches the ground.
  • Hurricane
    • Large rotating tropical storm with wind speeds at least 119km/hr.
  • Hurricane Eye wall
    • Cumulonimbus clouds that produce heavy rains & forceful winds
  • Hurricane Eye
    • Center of the hurricane.
  • Rain Bands
    • Spiraling bands of clouds
  • 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.
  • 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
  • Chapter 16 Understanding Weather Section 4 Forecasting the Weather
  • Weather Forecast
    • A prediction of weather conditions over the next 3 to 5 days
  • Thermometer
    • A tool used to measure air temperature
  • Barometer
    • An instrument used to measure air pressure
  • Windsock or Wind Vane
    • The wind enters through the wide end and exits through the narrow end. Therefore the wide end points toward the wind.
  • Anemometer
    • An instrument used to measure wind speed
  • Weather Balloons
    • Measure weather conditions as high as 30 km above earth
  • Radar
    • Used to find the location, movement and intensity of precipitation
  • Weather Satellites
    • Orbit the Earth and provide weather information that can not be obtained from the ground
  • Station Model
    • A small circle showing the location of a weather station along with a set of symbols and numbers surrounding it that represent weather data
  • Isobars
    • Lines that connect points of equal air pressure
  • 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
  • References
    • http://www.homeschoollearning.com/units/unit_09-17-01.shtml
    • http://www.joyner-ranch.com/html/weather
    • http://www.wasatchicewater.com/product.asp
    • http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml
    • http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml
    • http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml
    • http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml
    • http://ww2010.atmos.uiuc.edu/%28Gl%29/guides/mtr/hyd/evap.rxml
    • http://www.tempright.com/products.htm
    • http://www.vaisala.com/Weather/archive/2004/03/11
    • http://jefferson.unl.edu/Burning/Forecast.htm
    • http://jefferson.unl.edu/Burning/Forecast.htm
    • http://www.ces.purdue.edu/pork/clipart/house.htm
    • http://www.westseneca.wnyric.org
    • http://schools.fcps.org/wfms/ziniewicz/clouds/cloud84.html
    • http://www.weatherworks.com/cool_clouds.html
    • http://www.evsc.virginia.edu/~evscta/EVSC250/clouds.html
    • http://www.capetownskies.com/clouds-high.htm
    • http://www.windows.ucar.edu/earth/images
    • h ttp ://www. webskite .com/weather-seminar/hazards/ice. htm
    • http://www.s-t.com/daily/12-96/12-28-96/a03wn028.htm
    • http://www.cltskywarn.org/svrwxrelated.htm
    • http://www.atmospheric-violence.com/  
  • References
    • http://www. essc . psu . edu /~ dbabb /Class_Extras.html
    • http://www.mdrusa.net/Webpdr/pdrhailknowledgebase.htm
    • http://www.aninoquisi.com/rain_gauge.htm
    • http://www.harcourtschool.com/scienceglossary/define/gr5/air_mass5.html
    • http://www.beeville.net/Weather
    • http://www.geocities.com/five_six_crew/news.htm
    • http://www.wdtv.com/weather/images/Weather_Review/Air%20Masses%20and%20Fronts.htm
    • http://www.wdtv.com/weather/images/Weather_Review/Air%20Masses%20and%20Fronts.htm
    • http://www.wdtv.com/weather/images/Weather_Review/Air%20Masses%20and%20Fronts.htm
    • http://www.lawngeese.com/phptest/images?sortby=2
    • http://student.science.uva.nl/~skowalcz/physics
    • http://crux.baker.edu/csaraf01/WEB111A/project/main.htm
    • http://www.xbox100.com/forums/showthread.php?s=&threadid=9223
    • http://www.ahoycaptain.com/shop/weemsplath_550700_barometer.html
    • http://carolyn.socklabs.com/
    • http:// cwet . http://solar. calvin . edu /performance/wind_speed. php
    • nic.in/WRA.htm
    • www.harcourtschool.com/.../weather_b6c.html
    • http://www.stolaf.edu/other/cegsic/itase/images/traverse_2001/pages/weather_balloon4.html
    • http://www.sierraphotography.com/wxnotes
    • http://abclocal.go.com/kfsn/weather
    • http://www.phys.unsw.edu.au/~map/weather/notes/noaa_sats.html
    • http://www.californiaspaceauthority.org/html/visions-from-above/weather.html
    • http://members.hmcltd.net/rosen
    • http://www.eos.ubc.ca/courses/atsc201/BrooksCole/MetSciEngr/satellite.html
    • http://www.geog.ubc.ca/weather/wd_index.html