Tornadoes are the most significant natural hazard in the American ____.
a. Southwest
b. Midwest
c. South
d. Northeast
e. Northwest
Question 2The average number of tornadoes per year is highest in ____.
a. Oklahoma
b. Kansas
c. Texas
d. Florida
e. Nebraska
Question 3The largest number of lightning deaths occur in ____.
a. Florida
b. Texas
c. Kansas
d. Georgia
e. Mississippi
Question 4Downbursts from a thunderstorm ____.
a. create high surface winds that extend in every direction from the center of the burst
b. are a hazard to air traffic but dissipate before reaching the ground
c. can only form from pockets of cold, dry air
d. are most common on the trailing edge of a thundercloud
e. are a wind effect that is not linked to rainfall
Question 5All of the following reduce the danger posed by lightning EXCEPT ____.
a. do not use running water if inside a home
b. avoid touching metal surfaces if inside a car
c. stay away from open water if outside
d. go to the center of an open field if outside
e. do not touch appliances that are plugged in if inside a home
Question 6Lightning flows ____.
a. only in areas of heavy rainfall
b. from the top of a thundercloud to the ground, passing through the lower cloud
c. from the cloud and the ground to a midpoint at low altitude
d. only in the area directly below the thundercloud
e. from the cloud to the ground in short, zig-zagging steps
Question 7Lightning results from electrical charge differences ____.
a. carried through the thundercloud by hail nuclei
b. between the leading and trailing edge of a thundercloud
c. between the upper and lower parts of a thundercloud
d. carried from the lower thundercloud to the ground by rain
e. carried from the center to the edge of the lower thundercloud by wind
Question 8Thunderstorms form when ____.
a. cool, dry air descends into warm, moist air
b. warm, moist air flows upward into cool, dry air
c. cool, moist air flows below warm, dry air
d. cool, moist air flows above warm, dry air
e. warm, moist air flows below cool, moist air
Question 9An ice storm can form when a ____.
a. layer of cold air and a layer of warm air mix between the clouds and the ground
b. layer of cold, dry air lies over a layer of warm air
c. layer of cold, moist air lies over a layer of warm air
d. layer of cold air lies under a layer of warm, dry air
e. layer of cold air lies under a layer of warm, moist air
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