Chapter 5 - Twisters!

1. When do most tornadoes occur in Tornado Alley?

• late fall and winter

• winter and early spring

• spring and early summer

• late summer and fall

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2. Most of the tornadoes in the United States occur in "Tornado Alley". Which of the following states is NOT in the path of Tornado Alley?

• Kansas

• California

• Texas

• Oklahoma

3. What fraction of the tornadoes that occur worldwide happen in the United States?

• 1/2

• 1/4

• 2/3

• 3/4

4. When does a funnel cloud become a tornado?

• Once a funnel cloud touches the ground, it is called a tornado.

• When a funnel cloud's winds reach 50 mph, it becomes a tornado.

• Once hailstones begin to fall from a funnel cloud, it is now called a tornado.

• When a funnel cloud spins for at least 30 minutes, it becomes a tornado.

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5. If a meteorologist sees a hook shape on a computer picture of a supercell, what might happen next?

• A tornado is losing its strength.

• A tornado might be about to form.

• Very large hailstones will start to fall.

• Strong winds will start to slow down.

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7. Which THREE statements best describe a tornado?

• Tornadoes can be unpredictable - tearing one house to pieces and leaving another untouched.

• Tornadoes have strong winds that can reach up to 300 mph.

• Tornadoes usually last around 2-3 hours.

• Tornadoes are like a gigantic vacuum cleaner, sucking up everything it touches, even whole ponds.

• Tornadoes can cause hurricanes to form.

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8. You are listening to the radio or tv, and the meteorologist says that there is a tornado warning. Which of following should you do next? There are 2 correct answers.

• The storm isn't dangerous yet, so you can go outside to check out the fascinating storm clouds.

• Take shelter in a basement or a room on the first floor, without windows.

• Stay inside until the storm is over, and listen to the radio to get the "all clear" message.

• Go to the top floor of your house or apartment.

9. This is a tornado that forms over water, but it is not nearly as powerful as a tornado.

• dust devil

• water devil

• hydrotornado

• waterspout

Is the following statement true or false? Dust devils cause more damage than waterspouts.

• True

• False

Huge thunderstorms that are most likely to give birth to tornadoes are called ________________.

• dust devils

• supercells

• waterspouts

• updrafts

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