Question 1

Choose All That Apply: Which of the following ingredients are absolutely necessary for the development of thunderstorms?

1. Moisture
2. Lift
3. Wind shear
4. Instability

Question 2

Multiple Choice: Which of the following answers is not an example of wind shear?

1. The wind speed changes as you increase in altitude above the Earth’s surface
2. The wind speed and direction do not change as you increase in altitude above the Earth’s surface
3. The wind speed and direction change as you increase in altitude above the Earth’s surface
4. The wind direction changes as you increase in altitude above the Earth’s surface

Question 3

Multiple Choice: A thunderstorm is 10 miles away. If you see a flash of lightning, approximately how long will it be until you hear the thunder?

1. 0 seconds
2. 5 seconds
3. 10 seconds
4. 50 seconds

Question 4

Multiple Choice: Which of the following is not a characteristic of an air-mass thunderstorm?

1. There is no vertical wind shear
2. The updraft of the storm is located in the same location as the downdraft
3. The environment features a change in wind speed with altitude but not wind direction
4. The life cycle of the storm lasts 15–30 minutes

Question 5

Multiple Choice: What type of thunderstorm features two separate downdrafts?

1. dry thunderstorm
2. air-mass thunderstorm
3. a derecho
4. supercell thunderstorm

Question 6

Choose All That Apply: Which of the following are defining characteristics of a severe thunderstorm?

1. Hail greater than 1 inch in diameter
2. Lightning
3. Wind speeds below 58 mph
4. Tornadoes

Question 7

Choose All That Apply: Which two locations are the most likely spots for a tornado to develop?

1. Within a supercell thunderstorm
2. At the leading edge of a line of thunderstorms
3. Within an air-mass thunderstorm
4. At the back edge of a line of thunderstorms

Question 8

Multiple Choice: How are the intensities of tornadoes estimated?

1. Based on direct measurements of their wind speeds
2. Based on their path length
3. Based on their pathwidth
4. Based on the damage they cause

Question 9

Multiple Choice: Which part of a supercell thunderstorm is currently hypothesized to play an important role in the development of a tornado?

1. The overshooting top
2. The forward-flank downdraft
3. The rear-flank downdraft
4. The funnel cloud

Question 10

Multiple Choice: The vertical stretching of air columns induced by the _________ within a supercell thunderstorm leads to ___________ in the rate of rotation of those air columns.

1. updraft; an increase
2. updraft; a decrease
3. forward-flank downdraft; an increase
4. forward-flank downdraft; a decrease

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