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View Attempt 1 of 1

Title: Bonus!! Extra Credit Assignment on Moisture (Feb 2)

Started: February 1, 2012 8:11 PM

Submitted: February 1, 2012 8:14 PM

Time spent: 00:03:23

Total score: 4/5 = 80% Total score adjusted by 0.0 Maximum possible score: 5

1.

First a question to review the material on Tuesday...

From the information given below, which city has the highest saturation vapor pressure?

Urbana, IL: T = 52F, Td = 32FSt. Louis, MO: T = 69F, Td = 46FMilwaukee, WI: T = 22F, Td = 21FAustin, TX: T = 90F, Td = 40F

Student Response

Value Correct Answer Feedback

A. Urbana

B. St. Louis

C. Milwaukee

D. Austin 100%

Score: 1/1

2.


From the information given below, which city has the highest vapor pressure?


Student Response


A. Urbana

B. St. Louis 100%

C. Milwaukee

D. Austin Score: 1/1

3.


From the information given below, which city has the highest amount of moisture in the air (i.e., most water vapor in the air)?


Student Response


A. Urbana

B. St. Louis

C. Milwaukee 0%


4.


From the information given below, which city has the highest relative humidity?


Student Response


A. Urbana

B. St. Louis

C. Milwaukee 100%


5.

Which of the following statements is true?

Student Response


A. It takes far less water vapor to saturate the air in a city with a low air temperature compared to a city with a high air temperature.

100%

B. the saturation vapor pressure is related to the dew point temperature

C. the higher the vapor pressure the lower the amount of moisture in the air.

D. As the air temperature decreases, the relative humidity decreases if you hold the amount of water vapor in the air constant.

Score: 1/1

1.


From the information given below, which city has the highest saturation vapor pressure?


Student Response


A. Urbana

B. St. Louis

C. Milwaukee

D. Austin 100%

Score: 1/1

2.


From the information given below, which city has the highest vapor pressure?


Student Response


A. Urbana

B. St. Louis 100%

C. Milwaukee


3.


From the information given below, which city has the highest amount of moisture in the air (i.e., most water vapor in the air)?


Student Response


A. Urbana

B. St. Louis

C. Milwaukee 0%


4.




Student Response


A. Urbana

B. St. Louis

C. Milwaukee 100%


5.

Which of the following statements is true?

Student Response


A. It takes far less water vapor to saturate the air in a city with a low air temperature compared to a city with a high air temperature.

100%

B. the saturation vapor pressure is related to the dew point temperature

C. the higher the vapor pressure the lower the amount of moisture in the air.

D. As the air temperature decreases, the relative humidity decreases if you hold the amount of water vapor in the air constant.

Score: 1/1

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Title: ECRA #1 Temp-Pres (Jan 24)

Started: January 23, 2012 8:52 PM

Submitted: January 23, 2012 9:02 PM



1.

If the temperature outside is 100 F, what is that temperature in Celsius?

Student Response


A. 100 C

B. 50 C

C. 38 C 100%

D. 22 C

E. 212 C Score: 1/1

2.

Does the air temperature increase or decrease with altitude in the stratosphere?

Student Response


A. Increase 100%

B. Decrease

C. Neither. The air temperature remains constant in the troposphere.

Score: 1/1

3.

In which layer of the atmosphere is the "ozone layer" found?

Student Response


A. troposphere

B. stratosphere 100%

C. mesosphere

D. thermosphere

E. ionosphere Score: 1/1

4.

How much does the air weigh within a column that expends from sea level all the way to the top of the atmosphere that is only 1 square inch in area?

Student Response


A. 0 lbs

B. 2.4 lbs

C. 14.7 lbs 100%

D. 29.9 lbs

E. 1013.25 lbs Score: 1/1

5.

At which of the following locations would you measure the lowest air pressure?

Student Response


A. Top of Mt. Everest (29,028 ft)

100%

B. Coors Field in Denver (5280 ft)

C. Top of C-Section in Assembly Hall (805 ft)

D. Lake Shore Drive in Chicago, IL (597 ft)

E. Times Square in New York City (15 ft)

Score: 1/1

1.

If the temperature outside is 100 F, what is that temperature in Celsius?

Student Response


A. 100 C

B. 50 C

C. 38 C 100%

D. 22 C

E. 212 C Score: 1/1

2.

Does the air temperature increase or decrease with altitude in the stratosphere?

Student Response


A. Increase 100%

B. Decrease

C. Neither. The air temperature remains constant in the troposphere.

Score: 1/1

3.

In which layer of the atmosphere is the "ozone layer" found?

Student Response


A. troposphere

B. stratosphere 100%

C. mesosphere

D. thermosphere

E. ionosphere Score: 1/1

4.

How much does the air weigh within a column that expends from sea level all the way to the top of the atmosphere that is only 1 square inch in area?

Student Response


A. 0 lbs

B. 2.4 lbs

C. 14.7 lbs 100%

D. 29.9 lbs

E. 1013.25 lbs Score: 1/1

5.

At which of the following locations would you measure the lowest air pressure?

Student Response


A. Top of Mt. Everest (29,028 ft)

100%

B. Coors Field in Denver (5280 ft)

C. Top of C-Section in Assembly Hall (805 ft)

D. Lake Shore Drive in Chicago, IL (597 ft)

E. Times Square in New York City (15 ft)

Score: 1/1



Title: ECRA #2 Pres-Moisture (Jan 26)

Started: January 25, 2012 7:10 PM

Submitted: January 25, 2012 7:37 PM



1.

In the weather map shown below, what weather variable is contoured on this map? What do meteorologists call these contour lines?

Student Response


A. temperature; isotherms

B. dewpoint temperature; isodrosotherms

0%

C. pressure; isobars

D. windspeed; isotachs

Score: 0/1

2.

As air temperature increases, the saturation vapor pressure (the amount of water vapor the air can hold) will __________________.

Student Response


A. increases 100%

B. decreases

C. remains constant

D. the saturation vapor pressure has nothing to do with air temperature.

Score: 1/1

3.

True or False. When the air temperature is equal to the dewpoint temperature, the saturation vapor pressure equals the vapor pressure and the relative humidity of the air is 100%

Student Response


A. True 100%

B. False Score: 1/1

4.

What is the process called when water goes from its solid phase (ice) to its gas phase (water vapor)?

Student Response


A. melting

B. evaporation

C. deposition

D. sublimation 100%

E. condensation Score: 1/1

5.

Shown below is a wind barb. In which direction is the wind blowing from and how fast is it?

Student Response


A. Southwest at 25 knots

B. Northwest at 15 knots

C. Northeast at 25 knots

100%

D. Northwest at 3 knots

E. Southeast at 3 knots

Score: 1/1

1.

In the weather map shown below, what weather variable is contoured on this map? What do meteorologists call these contour lines?

Student Response


A. temperature; isotherms

B. dewpoint temperature; isodrosotherms

0%

C. pressure; isobars

D. windspeed; isotachs

Score: 0/1

2.

As air temperature increases, the saturation vapor pressure (the amount of water vapor the air can hold) will __________________.

Student Response


A. increases 100%

B. decreases

C. remains constant

D. the saturation vapor pressure has nothing to do with air temperature.

Score: 1/1

3.

True or False. When the air temperature is equal to the dewpoint temperature, the saturation vapor pressure equals the vapor pressure and the relative humidity of the air is 100%

Student Response


A. True 100%

B. False Score: 1/1

4.

What is the process called when water goes from its solid phase (ice) to its gas phase (water vapor)?

Student Response


A. melting

B. evaporation

C. deposition

D. sublimation 100%

E. condensation Score: 1/1

5.

Shown below is a wind barb. In which direction is the wind blowing from and how fast is it?

Student Response


A. Southwest at 25 knots

B. Northwest at 15 knots

C. Northeast at 25 knots

100%

D. Northwest at 3 knots

E. Southeast at 3 knots

Score: 1/1


View Attempt 1 of 1

Title: ECRA #3 Moisture-1 (Jan 31)

Started: January 31, 2012 12:56 AM

Submitted: January 31, 2012 12:59 AM



1.

Using the information below, which city has the lowest relative humidity?

New Orleans, LA: Temperature (T) = 89F, Dewpoint Temperature (Td) = 66F;Chicago, IL: Temperature (T) = 72F, Dewpoint Temperature (Td) = 55F;Helena, MT: Temperature (T) = 39F, Dewpoint Temperature (Td) = 38F;Las Vegas, NV: Temperature (T) = 104F, Dewpoint Temperature (Td) = 39F

Student Response


A. New Orleans, LA

B. Chicago, IL

C. Helena, MT

D. Las Vegas, NV 100%

Score: 1/1

2.

From the information given below, which city has the highest vapor pressure AND the highest amount of moisture in the air?

Chicago, IL: T = 45F, Td = 32F;Memphis, TN: T = 62F, Td = 39F;Minneapolis, MN: T = 29F, Td = 28F;San Antonio, TX: T = 89F, Td = 42F

Student Response


A. Chicago, IL

B. Memphis, TN

C. Minneapolis, MN 0%

D. San Antonio, TX

Score: 0/1

3.



Student Response


A. Chicago, IL

B. Memphis, TN


D. San Antonio, TX Score: 1/1

4.

Check out figure 1.9 on page 11. Which air temperature has the highest saturation vapor pressure?

Student Response


A. 0C

B. 10C

C. 20C 0%

D. 30C

E. 40C

Score: 0/1

5.

Check out figure 1.10 on page 11. What time of day experiences the highest relative humidity?

Student Response


A. 6AM 100%

B. Noon

C. 6PM

D. Midnight Score: 1/1

1.

Using the information below, which city has the lowest relative humidity?

New Orleans, LA: Temperature (T) = 89F, Dewpoint Temperature (Td) = 66F;Chicago, IL: Temperature (T) = 72F, Dewpoint Temperature (Td) = 55F;Helena, MT: Temperature (T) = 39F, Dewpoint Temperature (Td) = 38F;Las Vegas, NV: Temperature (T) = 104F, Dewpoint Temperature (Td) = 39F

Student Response


A. New Orleans, LA

B. Chicago, IL

C. Helena, MT

D. Las Vegas, NV 100%

Score: 1/1

2.

From the information given below, which city has the highest vapor pressure AND the highest amount of moisture in the air?


Student Response


A. Chicago, IL

B. Memphis, TN


D. San Antonio, TX

Score: 0/1

3.



Student Response


A. Chicago, IL

B. Memphis, TN


D. San Antonio, TX Score: 1/1

4.

Check out figure 1.9 on page 11. Which air temperature has the highest saturation vapor pressure?

Student Response


A. 0C

B. 10C

C. 20C 0%

D. 30C

E. 40C

Score: 0/1

5.

Check out figure 1.10 on page 11. What time of day experiences the highest relative humidity?

Student Response


A. 6AM 100%

B. Noon

C. 6PM

D. Midnight Score: 1/1



Title: ECRA #4 Soundings and Satellites (Feb 2)





1.

Examine the sounding picture below and answer the following question.

What is the surface air temperature?

Student Response


A. 0C

B. 6C

C. 11C 100%

D. 14C Score: 1/1

2.

Examine the sounding displayed in question #1 and answer the following question.

What is the dew point temperature at 500 mb?

Student Response


A. -20C 100%

B. -16C

C. 20C

D. -10C Score: 1/1

3.

Which type of satellite is useless for meteorologists at 3AM?

Student Response


A. visible satellite imagery

B. infrared satellite imagery

C. water vapor imagery

0%

Score: 0/1

4.

If a cloud appears bright white on an infrared satellite image, where is it likely located in the troposphere?

Student Response


A. near the surface of the earth, like a fog

B. in the low-levels of the troposphere, like a stratus cloud

C. In the mid-levels of the troposphere, like a altocumulus cloud

D. In the upper-levels of troposphere, like a thick cumulonimbus thunderstorm cloud.

100%

Score: 1/1

5.

Check out the satellite images of the earth on page 39 in figure 2.16. Which of the following is not true about the satellites that took these images?

Student Response


A. the orbit in which this satellite took these images is called a geostationary orbit.

B. the satellite that took these images is roughly 36,000 km away from earth.

C. all of these images are made using visible satellite channels.

100%

D. images like these are available every 15 minutes from these satellites

Score: 1/1

1.

Examine the sounding picture below and answer the following question.

What is the surface air temperature?

Student Response


A. 0C

B. 6C

C. 11C 100%

D. 14C Score: 1/1

2.

Examine the sounding displayed in question #1 and answer the following question.

What is the dew point temperature at 500 mb?

Student Response


A. -20C 100%

B. -16C

C. 20C

D. -10C Score: 1/1

3.

Which type of satellite is useless for meteorologists at 3AM?

Student Response


A. visible satellite imagery

B. infrared satellite imagery

C. water vapor imagery

0%

Score: 0/1

4.

If a cloud appears bright white on an infrared satellite image, where is it likely located in the troposphere?

Student Response


A. near the surface of the earth, like a fog

B. in the low-levels of the troposphere, like a stratus cloud

C. In the mid-levels of the troposphere, like a altocumulus cloud

D. In the upper-levels of troposphere, like a thick cumulonimbus thunderstorm cloud.

100%

Score: 1/1

5.

Check out the satellite images of the earth on page 39 in figure 2.16. Which of the following is not true about the satellites that took these images?

Student Response


A. the orbit in which this satellite took these images is called a geostationary orbit.

B. the satellite that took these images is roughly 36,000 km away from earth.

C. all of these images are made using visible satellite channels.

100%

D. images like these are available every 15 minutes from these satellites

Score: 1/1



Title: ECRA #5 Satellites and Radar (Feb 7)





1.

True or False: The primary function of a weather satellite is to passively observe clouds from space while weather radar is designed to measure the intensity of precipitation.

Student Response


A. True 100%

B. False Score: 1/1

2.

If it is 3 UTC on Thursday September 15, what time is it locally in Champaign-Urbana?

Student Response


A. 8AM Thursday Sept 15

B. 3AM Wednesday Sept 14

C. 3PM Thursday Sept 15

D. 10PM Wednesday Sept 14

E. 9AM Thursday Sept 15

0%

Score: 0/1

3.

At what wavelength of the electromagnetic spectrum does the Doppler radar use to measure precipitation?

Student Response


A. Ultraviolet

B. Visible

C. Infrared 0%

D. microwave

E. radio wave Score: 0/1

4.

True or False: Doppler radar can measure both the intensity of the precipitation and the wind speed and direction?

Student Response


A. True 100%

B. False Score: 1/1

5.

If the Doppler radar is measuring an echo of 41 dBZ, what is the corresponding rainfall rate?

Student Response


A. 0.01 inches per hour

B. 0.5 inches per hour

100%

C. 2.5 inches per hour

D. 5 inches per hour

E. Doppler radar does not give information on the rainfall rate, only the intensity of the precipitation.

Score: 1/1

1.

True or False: The primary function of a weather satellite is to passively observe clouds from space while weather radar is designed to measure the intensity of precipitation.

Student Response


A. True 100%

B. False Score: 1/1

2.

If it is 3 UTC on Thursday September 15, what time is it locally in Champaign-Urbana?

Student Response


A. 8AM Thursday Sept 15

B. 3AM Wednesday Sept 14

C. 3PM Thursday Sept 15

D. 10PM Wednesday Sept 14

E. 9AM Thursday Sept 15

0%

Score: 0/1

3.

At what wavelength of the electromagnetic spectrum does the Doppler radar use to measure precipitation?

Student Response


A. Ultraviolet

B. Visible

C. Infrared 0%

D. microwave

E. radio wave Score: 0/1

4.

True or False: Doppler radar can measure both the intensity of the precipitation and the wind speed and direction?

Student Response


A. True 100%

B. False Score: 1/1

5.

If the Doppler radar is measuring an echo of 41 dBZ, what is the corresponding rainfall rate?

Student Response


A. 0.01 inches per hour

B. 0.5 inches per hour

100%

C. 2.5 inches per hour

D. 5 inches per hour

E. Doppler radar does not give information on the rainfall rate, only the intensity of the precipitation.

Score: 1/1


View Attempt 1 of 1

Title: ECRA #6 Winter Cyclones (Feb 14)





1.

In what direction do Extra-tropical Cyclones typically track across the US?

Student Response


A. North to South

B. South to North 0%

C. East to West

D. West to East

Score: 0/1

2.

The entire life cycle of an Extra-tropical Cyclone lasts ...

Student Response


A. 3 - 6 hours

B. 12 - 24 hours

C. 1 - 2 days

D. 3 days to a week 100%

E. 2 - 3 weeks Score: 1/1

3.

From a satellites perspective, the cloud field of an Extra-tropical Cyclone resembles which punctuation mark?

Student Response


A. comma 100%

B. semicolon

C. exclamation point

D. hyphen

E. umlaut Score: 1/1

4.

True or False: In a typical Extra-tropical Cyclone, winter precipitation is found to the north of the low-pressure center while rain and thunderstorms are found to the south of the low-pressure system in the "tail".

Student Response


A. True 100%

B. False Score: 1/1

5.

Compare the satellite views of the Extra-tropical Cyclone in figure 10.1 to Hurricane Erika (1997) in figure 24.14. Which weather system is larger and covers more area?

Student Response


A. Hurricane

B. Extra-tropical Cylone

100%

C. Neither is larger. They are both approximately the same size.

Score: 1/1

1.

In what direction do Extra-tropical Cyclones typically track across the US?

Student Response


A. North to South

B. South to North 0%

C. East to West

D. West to East

Score: 0/1

2.

The entire life cycle of an Extra-tropical Cyclone lasts ...

Student Response


A. 3 - 6 hours

B. 12 - 24 hours

C. 1 - 2 days

D. 3 days to a week 100%

E. 2 - 3 weeks Score: 1/1

3.

From a satellites perspective, the cloud field of an Extra-tropical Cyclone resembles which punctuation mark?

Student Response


A. comma 100%

B. semicolon

C. exclamation point

D. hyphen

E. umlaut Score: 1/1

4.

True or False: In a typical Extra-tropical Cyclone, winter precipitation is found to the north of the low-pressure center while rain and thunderstorms are found to the south of the low-pressure system in the "tail".

Student Response


A. True 100%

B. False Score: 1/1

5.

Compare the satellite views of the Extra-tropical Cyclone in figure 10.1 to Hurricane Erika (1997) in figure 24.14. Which weather system is larger and covers more area?

Student Response


A. Hurricane

B. Extra-tropical Cylone

100%

C. Neither is larger. They are both approximately the same size.

Score: 1/1


View Attempt 1 of 1

Title: ECRA #7 Ice Storms (Feb 16)





1.

What percentage of all winter weather related injuries are from freezing precipitation?

Student Response


A. 10%

B. 20% 100%

C. 50%

D. 75%

E. 90% Score: 1/1

2.

Is it possible for water to remain a liquid at temperatures below freezing (below 0C or 32F)?

Student Response


A. Yes 100%

B. No Score: 1/1

3.

What do meteorologists call a layer in the atmosphere where the temperature increases with height?

Student Response


A. thermal rise

B. ridge 0%

C. temperature inversion

D. warm conveyor belt

E. thermal anomoly Score: 0/1

4.

From the list below, select the state that on average has the highest annual hours of freezing rain.

Student Response


A. Illinois

B. New York 100%

C. Oregon

D. Colorado

E. Minnesota Score: 1/1

5.

To qualify as an "ice storm" by the National Weather Service, how much ice must accumulate?

Student Response


A. 1/4 of an inch 100%

B. 1 inch

C. 2 inches

D. 5 inches

E. There is no criteria, there must simply be freezing rain ocurring to get an ice storm.

Score: 1/1

1.

What percentage of all winter weather related injuries are from freezing precipitation?

Student Response


A. 10%

B. 20% 100%

C. 50%

D. 75%

E. 90% Score: 1/1

2.

Is it possible for water to remain a liquid at temperatures below freezing (below 0C or 32F)?

Student Response


A. Yes 100%

B. No Score: 1/1

3.

What do meteorologists call a layer in the atmosphere where the temperature increases with height?

Student Response


A. thermal rise

B. ridge 0%

C. temperature inversion

D. warm conveyor belt

E. thermal anomoly Score: 0/1

4.

From the list below, select the state that on average has the highest annual hours of freezing rain.

Student Response


A. Illinois

B. New York 100%

C. Oregon

D. Colorado

E. Minnesota Score: 1/1

5.

To qualify as an "ice storm" by the National Weather Service, how much ice must accumulate?

Student Response


A. 1/4 of an inch 100%

B. 1 inch

C. 2 inches

D. 5 inches

E. There is no criteria, there must simply be freezing rain ocurring to get an ice storm.

Score: 1/1


View Attempt 1 of 1

Title: ECRA #8 Blizzards (Feb 21)

Started: February 21, 2012 12:32 AM

Submitted: February 21, 2012 12:40 AM



1.

How fast must the winds be blowing if the National Weather Service has issued a blizzard warning?

Student Response


A. 25 mph

B. 35 mph 100%

C. 45 mph

D. 55 mph

E. Wind speed is not one of the criteria needed for a bllizzard.

Score: 1/1

2.

Which state has the highest annual probability of having a blizzard?

Student Response


A. Wisconsin

B. Minnesota

C. Montana

D. North Dakota 100%

E. Wyoming Score: 1/1

3.

If you were standing at the center of an extra-tropical cyclone, in other words, you are standing at the center of the low-pressure system, in which direction would you have to look to find the part of the cyclone that is creating the blizzard conditions?

Student Response


A. look to the southeast

B. look to the southwest

C. look to the northwest

100%

D. look to the northeast

Score: 1/1

4.

Is it possible to have a blizzard even if it is currently not snowing?

Student Response


A. Yes 100%

B. No Score: 1/1

5.

What is pictured below?

Student Response


A. snow straw

B. snow roller 100%

C. snow cannon

D. snow barrel

E. a botched attempt at making a snowman

Score: 1/1

1.


Student Response


A. 25 mph

B. 35 mph 100%

C. 45 mph

D. 55 mph


Score: 1/1

2.


Student Response


A. Wisconsin

B. Minnesota

C. Montana



3.


Student Response





100%


Score: 1/1

4.


Student Response


A. Yes 100%

B. No Score: 1/1

5.


Student Response


A. snow straw

B. snow roller 100%

C. snow cannon

D. snow barrel


Score: 1/1

1.


Student Response


A. 25 mph

B. 35 mph 100%

C. 45 mph

D. 55 mph


Score: 1/1

2.


Student Response


A. Wisconsin

B. Minnesota

C. Montana



3.


Student Response





100%


Score: 1/1

4.


Student Response


A. Yes 100%

B. No Score: 1/1

5.


Student Response


A. snow straw

B. snow roller 100%

C. snow cannon

D. snow barrel


Score: 1/1


View Attempt 1 of 1

Title: ECRA #16 Lightning Part 1 (April 5)

Started: April 4, 2012 11:11 PM

Submitted: April 4, 2012 11:38 PM



1.

Examine Fig. 21.1 and find which of the following locations has the highest average annual number of lightning flashes per square km.

Student Response


A. Southeast United States

B. Southern Australia

C. Central Africa 100%

D. Indian Subcontinent

E. Central Europe

Score: 1/1

2.

Over the period 2002-2006, 211 people were struck and killed by lightning. Which of the following locations was the most deadly location with to these 211 people?

Student Response


A. under trees

B. near water

C. campgrounds

D. open areas including ballparks

100%

E. on or near heavy equipment

Score: 1/1

3.

What is the crucial ingredient for the formation of lightning such that without this ingredient, lightning does not form in thunderstorm?

Student Response


A. Ice 100%

B. dust

C. large rain drops (greater than 2mm in diamters)

D. counterclockwise turning winds with height.

E. flux capacitor Score: 1/1

4.

In what direction does the "return stroke" travel in the most common type of cloud-to-ground lightning strike?

Student Response


A. from the cloud to the ground

B. from the ground to the cloud

100%

C. we do not know - this is an active area of research in atmospheric science.

Score: 1/1

5.

Which of the following best describes why there is thunder?

Student Response


A. The lightning strike slices through the air at the speed of light. After the strike is over, a loud "clap" is heard when the air molecules rush back together to fill the void created by the strike.

B. Lightning heats the air to 54,000F immediately around the bolt which causes a rapid expansion of the air near the bolt. This creates a huge pressure wave which we eventually hear as thunder.

100%

C. Thunder is the result of the impact that the tip of the lightning bolt makes when it hits an object. This in why only cloud to ground lightning makes thunder.

D. When a lightning strike occurs, rain water in the area near the bolt is rapidly and explosively boiled. When this occurs, the vaporization of the water releases a deafening sound wave.

E. Thunder is God clapping his hands.

Score: 1/1

1.

Examine Fig. 21.1 and find which of the following locations has the highest average annual number of lightning flashes per square km.

Student Response


A. Southeast United States

B. Southern Australia

C. Central Africa 100%

D. Indian Subcontinent

E. Central Europe

Score: 1/1

2.

Over the period 2002-2006, 211 people were struck and killed by lightning. Which of the following locations was the most deadly location with to these 211 people?

Student Response


A. under trees

B. near water

C. campgrounds

D. open areas including ballparks

100%

E. on or near heavy equipment

Score: 1/1

3.

What is the crucial ingredient for the formation of lightning such that without this ingredient, lightning does not form in thunderstorm?

Student Response


A. Ice 100%

B. dust

C. large rain drops (greater than 2mm in diamters)

D. counterclockwise turning winds with height.

E. flux capacitor Score: 1/1

4.

In what direction does the "return stroke" travel in the most common type of cloud-to-ground lightning strike?

Student Response


A. from the cloud to the ground

B. from the ground to the cloud

100%

C. we do not know - this is an active area of research in atmospheric science.

Score: 1/1

5.

Which of the following best describes why there is thunder?

Student Response


A. The lightning strike slices through the air at the speed of light. After the strike is over, a loud "clap" is heard when the air molecules rush back together to fill the void created by the strike.

B. Lightning heats the air to 54,000F immediately around the bolt which causes a rapid expansion of the air near the bolt. This creates a huge pressure wave which we eventually hear as thunder.

100%

C. Thunder is the result of the impact that the tip of the lightning bolt makes when it hits an object. This in why only cloud to ground lightning makes thunder.

D. When a lightning strike occurs, rain water in the area near the bolt is rapidly and explosively boiled. When this occurs, the vaporization of the water releases a deafening sound wave.

E. Thunder is God clapping his hands.

Score: 1/1













1.

Between the years 2001 and 2006, who or what started more forest fires?

Student Response


A. lightning

B. humans 100%

Score: 1/1

2.

In a cloud that is capable of producing a cloud-to-ground lightning strike, where to the negative charges accumulate in the cloud?

Student Response


A. near the top of the cloud

B. near the center of the cloud

C. near the bottom of the cloud

100%

D. on the right side of the cloud

E. on the left side of the cloud

Score: 1/1

3.

Is the air a good conductor or electricity or a good insulator?

Student Response


A. conductor

B. insulator 100%

Score: 1/1

4.

Which of the following correctly lists the order of events for a cloud to ground lightning strike?

Student Response


A. dart leader, stepped leader, return stroke, second return stroke

B. stepped leader, dart leader, return stroke, second return stroke

C. dart leader, return stroke, second return stroke, stepped leader

D. stepped leader, return stroke, dart leader, second return stroke

100%

E. stepped leader, dart leader, return stroke, second return stroke

Score: 1/1

5.

True or False: If you are about to be struck by lightning, you hair may stand on end.

Student Response


A. True 100%

B. False Score: 1/1


View Attempt 1 of 1


Started: April 12, 2012 3:38 AM

Submitted: April 12, 2012 3:39 AM








1.

Myth or Fact:

The exact location of a lightning strike can be predicted.

Student Response


A. Myth 100%

B. Fact Score: 1/1

2.

Myth or Fact:

People struck by lightning carry an electrical charge and should not be touched.

Student Response


A. Myth 100%

B. Fact Score: 1/1

3.

Myth of Fact:

If you are caught outdoors during an electrical storm one of the safest places to be is in your car.

Student Response


A. Myth

B. Fact 100%

Score: 1/1

4.

Myth or Fact:

If you feel your hair stand on end during an electrical storm, crouch down low to the ground you could be struck by lightning.

Student Response


A. Myth

B. Fact 100%

Score: 1/1

5.

Myth or Fact:

A typical lightning strike is 5 km long and 2 to 3 cm wide.

Student Response


A. Myth

B. Fact 100%

Score: 1/1


View Attempt 1 of 1

Title: ECRA #19 Thunderstorms Part 1 (April 17)





1.

What is the formal name of the cloud that produces a thunderstorm?

Student Response


A. stratus

B. altocumulus

C. cumulonimbus 100%

D. cirrus

E. lenticular Score: 1/1

2.

Which of the following is not a requirement for the National Weather Service (NWS) to determine if a thunderstorm is severe?

Student Response


A. frequent cloud to ground lightning

100%

B. hail bigger than 3/4 of an inch

C. 58 mph winds

D. tornado Score: 1/1

3.

For a thunderstorm to become severe, 4 ingredients are needed. Which ingredient listed below is NOT needed?

Student Response


A. strong wind shear

B. a source of moisture

C. a trigger mechanism

D. a conditionally unstable atmosphere

0%

E. warm surface air temperatures (T>72F)

Score: 0/1

4.

What is the name of the cloud pictured below as indicated with an arrow?

Student Response


A. mammatus clouds

B. anvil cloud 100%

C. shelf cloud

D. roll cloud

E. wall cloud Score: 1/1

5.

How much water is in a typical thunderstorm if you were to measure its weight?

Student Response


A. 500 tons

B. 2,000 tons

C. 5,000 tons

D. 20,000 tons

E. 3.7 million tons 100%

Score: 1/1

1.

What is the formal name of the cloud that produces a thunderstorm?

Student Response


A. stratus

B. altocumulus

C. cumulonimbus 100%

D. cirrus

E. lenticular Score: 1/1

2.

Which of the following is not a requirement for the National Weather Service (NWS) to determine if a thunderstorm is severe?

Student Response


A. frequent cloud to ground lightning

100%

B. hail bigger than 3/4 of an inch

C. 58 mph winds

D. tornado Score: 1/1

3.

For a thunderstorm to become severe, 4 ingredients are needed. Which ingredient listed below is NOT needed?

Student Response


A. strong wind shear

B. a source of moisture

C. a trigger mechanism

D. a conditionally unstable atmosphere

0%

E. warm surface air temperatures (T>72F)

Score: 0/1

4.

What is the name of the cloud pictured below as indicated with an arrow?

Student Response


A. mammatus clouds

B. anvil cloud 100%

C. shelf cloud

D. roll cloud

E. wall cloud Score: 1/1

5.

How much water is in a typical thunderstorm if you were to measure its weight?

Student Response


A. 500 tons

B. 2,000 tons

C. 5,000 tons

D. 20,000 tons

E. 3.7 million tons 100%

Score: 1/1


View Attempt 1 of 1

Title: ECRA #20 - Stability Review (April 19)





Title: ECRA #20 - Stability Review (April 19)





1.

Using the sounding below, answer questions 1-5.

Which arrow is pointing to the LCL (lifting condensation level)?

Student Response


A. A

B. B

C. C

D. D

E. E 0%

Score: 0/1

2.

Which arrow is point to the LFC (Level of Free Convection)?

Student Response


A. A

B. B

C. C

D. D 0%

E. E Score: 0/1

3.

Which arrow is pointing toward the EL (Equilibrium Level)?

Student Response


A. A

B. B

C. C 0%

D. D

E. E Score: 0/1

4.

What is the value of the LI (Lifted Index)?

Student Response


A. 5

B. -7 100%

C. 21

D. -10

E. 7 Score: 1/1

5.

At which letter would you find the base of a thunderstorm cloud that formed in this environment?

Student Response


A. A 0%

B. B

C. C

D. D

E. E Score: 0/1

1.

Using the sounding below, answer questions 1-5.

Which arrow is pointing to the LCL (lifting condensation level)?

Student Response


A. A

B. B

C. C

D. D

E. E 0%

Score: 0/1

2.

Which arrow is point to the LFC (Level of Free Convection)?

Student Response


A. A

B. B

C. C

D. D 0%

E. E Score: 0/1

3.

Which arrow is pointing toward the EL (Equilibrium Level)?

Student Response


A. A

B. B

C. C 0%

D. D

E. E Score: 0/1

4.

What is the value of the LI (Lifted Index)?

Student Response


A. 5

B. -7 100%

C. 21

D. -10

E. 7 Score: 1/1

5.

At which letter would you find the base of a thunderstorm cloud that formed in this environment?

Student Response


A. A 0%

B. B

C. C

D. D

E. E Score: 0/1


View Attempt 1 of 1

Title: ECRA #21 - MCSs (April 24)





1.

During which of the three stages of development of an ordinary (or airmass) thunderstorms does the downdraft develop?

Student Response


A. cumulus stage

B. mature stage 100%

C. dissipation stage

D. the downdraft is present in all three stages.

Score: 1/1

2.

The downdraft of a thunderstorm can be described as a pocket of descending that is loaded with precipitation falling from the storm. Is this pocket of air warm or cold as it falls from the cloud?

Student Response


A. warm

B. cold 100%

Score: 1/1

3.

Examine panel G in the six-panel figure on page 338 (Figure 18.5). Labeled in this image is "radar fine line - gust front". What type of cloud is often associated with this feature?

Student Response


A. anvil cloud

B. mammatus cloud

C. wall cloud

D. shelf cloud 100%

E. lenticular clouds Score: 1/1

4.

Identify the cloud pictured below.

This cloud is often found on the underneath side of the anvil.

Student Response


A. Lenticular cloud

B. shelf cloud

C. mammatus cloud 100%

D. wall cloud

E. funnel cloud

F. roll cloud Score: 1/1

5.

The radar image below shows a bow echo associated with a Mesoscale Convective System (MCS). At which letter woud the most intense thunderstorm winds be located?

Student Response


A. A

B. B

C. C

D. D 0%

E. E Score: 0/1

1.

During which of the three stages of development of an ordinary (or airmass) thunderstorms does the downdraft develop?

Student Response


A. cumulus stage

B. mature stage 100%

C. dissipation stage

D. the downdraft is present in all three stages.

Score: 1/1

2.

The downdraft of a thunderstorm can be described as a pocket of descending that is loaded with precipitation falling from the storm. Is this pocket of air warm or cold as it falls from the cloud?

Student Response


A. warm

B. cold 100%

Score: 1/1

3.

Examine panel G in the six-panel figure on page 338 (Figure 18.5). Labeled in this image is "radar fine line - gust front". What type of cloud is often associated with this feature?

Student Response


A. anvil cloud

B. mammatus cloud

C. wall cloud

D. shelf cloud 100%

E. lenticular clouds Score: 1/1

4.

Identify the cloud pictured below.

This cloud is often found on the underneath side of the anvil.

Student Response


A. Lenticular cloud

B. shelf cloud

C. mammatus cloud 100%

D. wall cloud

E. funnel cloud

F. roll cloud Score: 1/1

5.

The radar image below shows a bow echo associated with a Mesoscale Convective System (MCS). At which letter woud the most intense thunderstorm winds be located?

Student Response


A. A

B. B

C. C

D. D 0%

E. E Score: 0/1


View Attempt 1 of 1

Title: ECRA #22 Supercells (April 24)





Title: ECRA #22 Supercells (April 24)





1.

Where is the frontal squall line typically located with respect to the low-pressure center of an Extra-Tropical Cyclone?

Student Response


A. to the east of the low-pressure center

0%

B. to the west of the low-pressure center

C. to the south of the low-pressure center

D. to the north of the low-pressure center

Score: 0/1

2.

Which is larger, the MCS (mesoscale convective system) or the supercell?

Student Response


A. MCS 100%

B. Supercell Score: 1/1

3.

True or False: Supercell thunderstorms always rotate.

Student Response


A. True

B. False 0%

Score: 0/1

4.

Examine the radar image below of a supercell thunderstorm. Where is the hook echo?

Student Response


A. A

B. B 100%

C. C

D. D

E. E Score: 1/1

5.

What is the name assigned to the rotating updraft of a supercell thunderstorm?

Student Response


A. tornado

B. mesoscale convective vortex

C. flanking line

D. mesocyclone 100%

E. rotating vault Score: 1/1

1.

Where is the frontal squall line typically located with respect to the low-pressure center of an Extra-Tropical Cyclone?

Student Response


A. to the east of the low-pressure center

0%

B. to the west of the low-pressure center

C. to the south of the low-pressure center

D. to the north of the low-pressure center

Score: 0/1

2.

Which is larger, the MCS (mesoscale convective system) or the supercell?

Student Response


A. MCS 100%

B. Supercell Score: 1/1

3.

True or False: Supercell thunderstorms always rotate.

Student Response


A. True

B. False 0%

Score: 0/1

4.

Examine the radar image below of a supercell thunderstorm. Where is the hook echo?

Student Response


A. A

B. B 100%

C. C

D. D

E. E Score: 1/1

5.

What is the name assigned to the rotating updraft of a supercell thunderstorm?

Student Response


A. tornado

B. mesoscale convective vortex

C. flanking line

D. mesocyclone 100%

E. rotating vault Score: 1/1


View Attempt 1 of 1

Title: ECRA #23 Tornadoes Part 1 (May 1)

Started: May 1, 2012 12:24 AM

Submitted: May 1, 2012 12:44 AM



1.

What percentage of the world's tornadoes occur in the United States?

Student Response


A. 10%

B. 25%

C. 50%

D. 75% 100%

E. 90% Score: 1/1

2.

When a tornado takes on a rope-like appearance, at what stage in the life cycle is this tornado?

Student Response


A. funnel cloud stage

B. dust swirl stage

C. organization stage

D. mature stage

E. shrinking and decaying stage

100%

Score: 1/1

3.

Ignoring Florida, what rank does Illinois get when the states are ranked by the average number of tornadoes per 10,000 square miles over the 50-yr period of 1953-2004?

Student Response


A. 1st

B. 2nd

C. 3rd 0%

D. 4th

E. 5th

F. 6th Score: 0/1

4.

What percentage of all tornadoes reach EF-5 on the Enhanced Fujita Scale?

Student Response


A. 0.3% 100%

B. 3%

C. 9.3%

D. 37.3%

E. There have not been any EF-5 tornadoes.

Score: 1/1

5.

Tornadoes are most frequent during the month of __________ around ____ o'clock in the __________.

Student Response


A. February, 5, morning

B. July, 3, afternoon

C. May, 5, afternoon 100%

D. April, 8, evening

E. August, 7, evening Score: 1/1

1.

What percentage of the world's tornadoes occur in the United States?

Student Response


A. 10%

B. 25%

C. 50%

D. 75% 100%

E. 90% Score: 1/1

2.

When a tornado takes on a rope-like appearance, at what stage in the life cycle is this tornado?

Student Response


A. funnel cloud stage

B. dust swirl stage

C. organization stage

D. mature stage

E. shrinking and decaying stage

100%

Score: 1/1

3.

Ignoring Florida, what rank does Illinois get when the states are ranked by the average number of tornadoes per 10,000 square miles over the 50-yr period of 1953-2004?

Student Response


A. 1st

B. 2nd

C. 3rd 0%

D. 4th

E. 5th

F. 6th Score: 0/1

4.

What percentage of all tornadoes reach EF-5 on the Enhanced Fujita Scale?

Student Response


A. 0.3% 100%

B. 3%

C. 9.3%

D. 37.3%

E. There have not been any EF-5 tornadoes.

Score: 1/1

5.

Tornadoes are most frequent during the month of __________ around ____ o'clock in the __________.

Student Response


A. February, 5, morning

B. July, 3, afternoon

C. May, 5, afternoon 100%

D. April, 8, evening

E. August, 7, evening Score: 1/1


View Attempt 1 of 1

Title: ECRA #24 Tornadoes Part 2 (May 1)

Started: May 1, 2012 12:44 AM

Submitted: May 1, 2012 12:59 AM



1.

Supercell thunderstorms always rotate.

Student Response Value Correct AnswerTrue 100% TrueScore: 1/1

2.

The "low-level jet" is an important feature of the environment within which supercells and tornadoes form. This fast pocket of wind is necessary for two primary reasons - first to help create the needed wind shear and second to transport warm moist air into the storm.

From what direction does the low-level jet come from?

Student Response


A. northerly direction

B. southerly direction 100%

C. westerly direction

D. easterly direction

E. there is no such feature called the "low-level jet"

Score: 1/1

3.

What does the "mesocyclone" refer to?

Student Response


A. the inner circulations of a wide tornado

B. a very wide tornado

C. the rotating updraft of a supercell thunderstorm

100%

D. a high latitude tornado

E. the primary down draft of a supercell thunderstorm

Score: 1/1

4.

If a tornado were to form within a supercell, from which of the following clouds would it emerge from?

Student Response


A. shelf cloud

B. mammatus cloud

C. backsheared anvil cloud

0%

D. scud cloud

E. wall cloud

Score: 0/1

5.

Examine the image below. Which letter represents the location of both the updraft of the supercell and the tornado?

Student Response


A. A 100%

B. B

C. C

D. D Score: 1/1

1.

Supercell thunderstorms always rotate.

Student Response Value Correct AnswerTrue 100% TrueScore: 1/1

2.

The "low-level jet" is an important feature of the environment within which supercells and tornadoes form. This fast pocket of wind is necessary for two primary reasons - first to help create the needed wind shear and second to transport warm moist air into the storm.

From what direction does the low-level jet come from?

Student Response


A. northerly direction

B. southerly direction 100%

C. westerly direction

D. easterly direction

E. there is no such feature called the "low-level jet"

Score: 1/1

3.

What does the "mesocyclone" refer to?

Student Response


A. the inner circulations of a wide tornado

B. a very wide tornado

C. the rotating updraft of a supercell thunderstorm

100%

D. a high latitude tornado

E. the primary down draft of a supercell thunderstorm

Score: 1/1

4.

If a tornado were to form within a supercell, from which of the following clouds would it emerge from?

Student Response


A. shelf cloud

B. mammatus cloud

C. backsheared anvil cloud

0%

D. scud cloud

E. wall cloud

Score: 0/1

5.

Examine the image below. Which letter represents the location of both the updraft of the supercell and the tornado?

Student Response


A. A 100%

B. B

C. C

D. D Score: 1/1

extra credits

Documents

austin score

highest vapor pressure

water vapor

total score

air constant

air temperature decreases

low air temperature

high air temperature