• 1. 
    Which country reports the largest number of tornadoes per land area each year?

  • Ukraine
  • United States
  • Australia
  • United Kingdom
  • 2. 
    Ionized channels open up between regions of negative and positive charge and, in just thousandths of a second, millions of volts are transmitted and the immediate area is heated to 30,000 °C (50,000 °F). What has happened?

  • lightning has struck
  • a tornado has formed
  • a hail storm has started
  • a hurricane has made landfall
  • 3. 
    Acid rain is formed by the reaction of which two gases with water?

  • sulfur dioxide and carbon monoxide
  • carbon monoxide and nitrogen oxide
  • nitrogen oxide and sulfur dioxide
  • carbon dioxide and nitrogen oxide
  • 4. 
    What is created by the action of sunlight on gaseous nitrogen oxides and hydrocarbons in the atmosphere?

  • snow
  • smog
  • mist
  • acid rain
  • 5. 
    Most clouds and weather systems are contained within which region of the atmosphere?

  • mesosphere
  • stratosphere
  • thermosphere
  • troposphere
  • 6. 
    Tornado Alley in the United States extends through which states?

  • Oregon and Washington
  • Florida, Georgia, South Carolina, and North Carolina
  • Arkansas, Missouri, Louisiana, and Mississippi
  • Texas, Oklahoma, Kansas, and Nebraska
  • 7. 
    The Fujita scale, or F-scale, is used for classifying the intensity of what kind of weather disturbance?

  • hurricanes
  • thunderstorms
  • microbursts
  • tornadoes
  • 8. 
    What does an anemometer measure?

  • acceleration
  • airflow
  • altitude
  • electric current
  • 9. 
    What phenomenon was once frequently seen atop ships’ masts and church steeples and can now occasionally be spotted at the tips of an airplane’s wings?

  • Saint Elmo’s fire
  • wind shear
  • tornadoes
  • ice crystallization
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