Question 1

Sometimes a cloud-to-ground lightning discharge appears to flicker. Which of the following statements explains why this happens?

Accepted Answer

A) You can distinguish separate return strokes. 
B) You observe entirely different strikes. 
C) You can observe the separate steps of the stepped leader. 
D) You blink because of the bright light. 
A) You can distinguish separate return strokes. 
B) You observe entirely different strikes. 
C) You can observe the separate steps of the stepped leader. 
D) You blink because of the bright light.

Question 2

Which of the following gives the name for the bluish halo that may appear above pointed objects underneath a thunderstorm?

Accepted Answer

A) heat lightning 
B) St.Elmo's fire 
C) sheet lightning 
D) fluorescence 
A) heat lightning 
B) St.Elmo's fire 
C) sheet lightning 
D) fluorescence

Question 3

Referring to the figure below, which of the following types of thunderstorms are forming to the right of the line that separates dry and moist air masses? ​

Accepted Answer

A) adiabatic 
B) severe 
C) dryline 
D) derecho 
A) adiabatic 
B) severe 
C) dryline 
D) derecho

Question 4

Which of the following actions take place after a tornado is spotted?

Accepted Answer

A) A tornado watch is issued. 
B) An aircraft carefully monitors the tornado's direction of movement. 
C) An attempt may be made to change the tornado's direction of movement. 
D) A tornado warning is issued. 
A) A tornado watch is issued. 
B) An aircraft carefully monitors the tornado's direction of movement. 
C) An attempt may be made to change the tornado's direction of movement. 
D) A tornado warning is issued.

Question 5

Which of the following occurs in the cumulus stage of an ordinary cell thunderstorm?

Accepted Answer

A) Hail is common. 
B) Thunder and lightning frequently occur. 
C) Cool air near the ground rises. 
D) Moist air rushes upward and forms an updraft. 
A) Hail is common. 
B) Thunder and lightning frequently occur. 
C) Cool air near the ground rises. 
D) Moist air rushes upward and forms an updraft.

Question 6

What is wind shear? Why does wind shear represent a hazard to aviation?

Accepted Answer

Wind shear refers to a change in wind sp

Question 7

What processes over southern Ontario lead to the high frequency of thunderstorms and potential tornadoes?

Accepted Answer

Southern Ontario experiences a relativel

Question 8

Which of the following describes where tornadoes are usually observed?

Accepted Answer

A) behind cold fronts 
B) ahead of cold fronts 
C) on the windward side of mountains 
D) near large bodies of water 
A) behind cold fronts 
B) ahead of cold fronts 
C) on the windward side of mountains 
D) near large bodies of water

Question 9

Which of the following statements describes an important principle in the electrification of a cumulonimbus cloud?

Accepted Answer

A) Raindrops are always positively charged. 
B) Supercooled water is always negatively charged. 
C) Ice crystals are always negatively charged. 
D) Positive ions transfer from a warm object to a cold object. 
A) Raindrops are always positively charged. 
B) Supercooled water is always negatively charged. 
C) Ice crystals are always negatively charged. 
D) Positive ions transfer from a warm object to a cold object.

Question 10

The fact that thunder sometimes sounds like a loud crash, and other times sounds like a dull rumble, has nothing to do with the intensity of the lightning strike that produced the thunder. Explain why.

Accepted Answer

The variations in the sound of thunder,

Question 11

Which of the following describes the cause of thunder?

Accepted Answer

A) turbulent wind motions inside the thunderstorm 
B) collision between two thunderstorms with opposite electrical charge 
C) explosion occurring when positive and negative charges collide and neutralize each other 
D) rapid heating of air surrounding a lightning channel 
A) turbulent wind motions inside the thunderstorm 
B) collision between two thunderstorms with opposite electrical charge 
C) explosion occurring when positive and negative charges collide and neutralize each other 
D) rapid heating of air surrounding a lightning channel

Sometimes a cloud-to-ground lightning discharge appears to flicker. Which of the following statements explains why this happens?

Which of the following gives the name for the bluish halo that may appear above pointed objects underneath a thunderstorm?

Referring to the figure below, which of the following types of thunderstorms are forming to the right of the line that separates dry and moist air masses?

Which of the following actions take place after a tornado is spotted?

Which of the following occurs in the cumulus stage of an ordinary cell thunderstorm?

What is wind shear? Why does wind shear represent a hazard to aviation?

What processes over southern Ontario lead to the high frequency of thunderstorms and potential tornadoes?

Which of the following describes where tornadoes are usually observed?

Which of the following statements describes an important principle in the electrification of a cumulonimbus cloud?

The fact that thunder sometimes sounds like a loud crash, and other times sounds like a dull rumble, has nothing to do with the intensity of the lightning strike that produced the thunder. Explain why.

Which of the following describes the cause of thunder?

Earth and Its Atmosphere

Energy: Warming Earth and the Atmosphere

Seasonal and Daily Temperatures

Atmospheric Humidity

Condensation: Dew, Fog, and Clouds

Stability and Cloud Development

Precipitation

Air Pressure and Winds

Wind: Small-Scale and Local Systems

Wind: Global Systems

Air Masses and Fronts

Middle-Latitude Cyclones

Thunderstorms

Tornadoes

Hurricanes

Earths Changing Climate

Global Climate

Air Pollution

Filters

Exam 13: Weather Forecasting

Sometimes a cloud-to-ground lightning discharge appears to flicker. Which of the following statements explains why this happens?

Which of the following gives the name for the bluish halo that may appear above pointed objects underneath a thunderstorm?

Referring to the figure below, which of the following types of thunderstorms are forming to the right of the line that separates dry and moist air masses? ​

Which of the following actions take place after a tornado is spotted?

Which of the following occurs in the cumulus stage of an ordinary cell thunderstorm?

What is wind shear? Why does wind shear represent a hazard to aviation?

What processes over southern Ontario lead to the high frequency of thunderstorms and potential tornadoes?

Which of the following describes where tornadoes are usually observed?

Which of the following statements describes an important principle in the electrification of a cumulonimbus cloud?

The fact that thunder sometimes sounds like a loud crash, and other times sounds like a dull rumble, has nothing to do with the intensity of the lightning strike that produced the thunder. Explain why.

Which of the following describes the cause of thunder?

Earth and Its Atmosphere

Energy: Warming Earth and the Atmosphere

Seasonal and Daily Temperatures

Atmospheric Humidity

Condensation: Dew, Fog, and Clouds

Stability and Cloud Development

Precipitation

Air Pressure and Winds

Wind: Small-Scale and Local Systems

Wind: Global Systems

Air Masses and Fronts

Middle-Latitude Cyclones

Thunderstorms

Tornadoes

Hurricanes

Earths Changing Climate

Global Climate

Air Pollution

Filters

Referring to the figure below, which of the following types of thunderstorms are forming to the right of the line that separates dry and moist air masses?