Weather: Chapter 3, Section 1: Air Masses and Fronts; Chapter 3, Sections 2 & 3: Storms/Weather Pred

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lcayward
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231392
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Weather: Chapter 3, Section 1: Air Masses and Fronts; Chapter 3, Sections 2 & 3: Storms/Weather Pred
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2013-08-26 16:24:54
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Weather Chapter Section Air Masses Fronts Sections Storms Predictions
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  1. AIR MASS
    Huge body of air that has similar temperature, humidity, and air pressure throughout it
  2. WHAT ARE THE 4 MAJOR TYPES POF AIR MASSES THAT INFLUENCE WEATHER IN NORTH AMERICA?
    • 1. Tropical
    • 2. Polar
    • 3. Maritime
    • 4. Continental
  3. TROPICAL AIR MASS
    Warm air mass that form in the tropics and have low air pressure
  4. POLAR AIR MASS
    Cold air mass that form north of 50 degrees north latitude and 50 degrees south latitude
  5. MARITIME AIR MASS
    Air masses that form over oceans
  6. CONTINENTAL AIR MASS
    Air masses that form over land
  7. MARITIME TROPICAL
    Warm, humid air masses that form over oceans near the tropics
  8. MARITIME POLAR
    Cool air masses that form over the icy cold North Pacific and North Atlantic Oceans
  9. CONTINENTAL TROPICAL
    Hot, dry air masses that form only in summer over dry areas of the southwest and Northern Mexico
  10. CONTINENTAL POLAR
    Air masses that form over central and Northern Canada or Alaska that bring cold air
  11. HOW ARE AIR MASSES MOVED IN THE USA?
    • 1. Prevailing Westerlies
    • 2. Jet Streams
  12. FRONT
    The area where air masses meet and do not meet
  13. WHAT ARE 4 TYPES OF FRONTS THAT COLLIDING AIR MASSES CAN FORM?
    • 1. Cold Front
    • 2. Warm Front
    • 3. Stationary Front
    • 4. Occluded Front
  14. COLD FRONT
    Where rapid moving cold air masses runs into slow moving warm air masses causes abrupt weather changes
  15. WARM FRONT
    A moving warm air mass that collides with a slow moving cold air mass
  16. STATIONARY FRONT
    When two air masses meet in a "stand-off"
  17. OCCLUDED FRONT
    When a warm air mass is caught between two colder air masses
  18. CYCLONE
    A swirling center of low air pressure from a Greek word meaning "wheel"
  19. CYCLONES AND DECREASING AIR PRESSURE ARE ASSOCIATED WITH WHAT 3 THINGS?
    • 1. Clouds
    • 2. Wind
    • 3. Precipitation
  20. ANTICYCLONES
    High pressure centers of dry air
  21. WHAT DOES THE DESCENDING AIR IN AN ANTICYCLONE GENERALLY CAUSE?
    Dry, clear weather
  22. STORM
    A violent disturbance in the atmosphere involving sudden changes in the air pressure
  23. THUNDERSTORM
    Heavy rainstorm accompanied by thunder and lightning
  24. WHERE DO THUNDERSTORMS FORM?
    Inside cumulonimbus clouds, or thunderheads
  25. LIGHTNING
    A sudden spark, or energy discharge, jumping from cloud to cloud to the ground
  26. WHAT ARE SOME SAFE THINGS TO DO DURING A THUNDERSTORM?
    • 1. Avoid toughing metal objects
    • 2. Stay away from open spaces
    • 3. Do not touch electrical appliances or plumbing fixtures
  27. TORNADO
    A rapid, whirling, funnel-shaped cloud that reaches down from a storm to touch Earth's surface
  28. HOW DO TORNADOES FORM?
    Develop in low, heavy cumulonimbus clouds the same clouds that bring thunderstorms
  29. TORNADO ALLEY
    Weather patterns often occurring in a certain USA region
  30. WHERE IS THE SAFEST PLACE TO BE DURING A TORNADO?
    The basement of a well-built structure
  31. HURRICANE
    A tropical storm that has wings up to 119 km per hour or higher
  32. WHERE DO HURRICANES BEGIN?
    Over warm water as a low pressure area, or tropical disturbance
  33. STORM SURGE
    A dome of water that sweeps across the coast where the hurricane lands causing great damage
  34. EVACUATE
    Move away temporarily
  35. WHAT ARE SOME SAFTY TIPS FOR HURRICANES?
    1. If you are given a warning to evacuate leave area immediately

    2. Move away from interior of buildings and windows
  36. LAKE-EFFECT SNOW
    As cold dry air masses move across the warmer water, it becomes more humid as water vapor evaporates from the lake surface. When air reaches land and cools, lake-effect snow falls
  37. WHAT SHOULD YOU DO IF YOU ARE CUAGHT IN A SNOW STORM?
    Try to find shelter from the wind
  38. METEOROLOGISTS
    A scientist that studies the causes of the weather and tries to predict it
  39. WHAT DO METEOROLOGISTS DO TO ANALYZE WEATHER AND PREDICT WEATHER?
    Use maps, charts, computers to analyze data and to prepare weather forecasts
  40. WHY HAVE WEATHER FORECASTS IMPROVED OVER TIME?
    Technology has improved accuracy in wether forecasts
  41. WHAT IS A WEATHER MAP?
    A snapshot of conditions at a particular time over a large area
  42. ISOBARS
    Lines joining places on the map that have the same air pressure
  43. ISOTHERMS
    Lines joining places that have the same temperature
  44. NEWSPAPER WEATHER MAP
    Maps in newspapers that are simplified versions of weather produced by the National Weather Service
  45. WHAT DO STANDARD SYMBOLS ON WEATHER MAPS SHOW?
    • 1. Fronts
    • 2. Areas of high and low pressure
    • 3. Types of precipitation
    • 4. Temperature
  46. BUTTERFLY EFFECT
    Scientists' suggest that even a small change in the weather today, like the flapping of a butterfly's wings, can mean a larger change in the atmosphere or in the weather in the next week

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