Air Masses and Fronts 185435 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which air mass would produce warm, humid weather in the summer? Choice Feedback *A. Maritime tropical That's correct! B. Maritime polar That's not it. Polar air is generally colder. C. Continental tropical That's not it. Continental air is generally not humid. D. Continental polar That's not it. Polar air is generally colder. Global Incorrect Feedback The correct answer is: Maritime tropical. -------------------------------------------------------------------------------- Question 1b of 10 ( 3 Air Masses and Fronts 250875 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which air mass would produce warm, dry weather in the summer? Choice Feedback *A. Continental tropical That's correct! B. Maritime polar That's not it. Polar air is generally colder. C. Maritime tropical That's not it. Maritime air is generally humid. D. Continental polar That's not it. Polar air is generally colder. Global Incorrect Feedback The correct answer is: Continental tropical. -------------------------------------------------------------------------------- Question 1c of 10 ( 3 Air Masses and Fronts 250876 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which air mass would produce cold, dry weather in the winter? Choice Feedback *A. Continental polar That's correct! B. Maritime polar That's not it. Maritime air is generally humid. C. Continental tropical That's not it. Tropical air is generally warmer. D. Maritime tropical That's not it. Tropical air is generally warmer. Global Incorrect Feedback The correct answer is: Continental polar. -------------------------------------------------------------------------------- Question 2a of 10 ( 2 Air Masses and Fronts 185436 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What happens in a cold front? Choice Feedback *A. A cold air mass comes in under a warm air mass. That's correct! B. A cold air mass catches up to a moving warm air mass, sliding over it. That's not it. Cold air masses slide under warm air masses. C. A warm air mass becomes a cold air mass as it moves. That's not it. This is not a cold front. D. A warm air mass collides with a stationary cold air mass, and slides under it. That's not it. Warm air masses slide over cold air masses. Global Incorrect Feedback The correct answer is: A cold air mass comes in under a warm air mass. -------------------------------------------------------------------------------- Question 2b of 10 ( 2 Air Masses and Fronts 250877 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What happens in a warm front? Choice Feedback *A. A warm air mass catches up to a moving cold air mass, sliding over it. That's correct! B. A cold air mass comes in under a warm air mass. That's not it. Cold air masses slide under warm air masses. C. A warm air mass becomes a cold air mass as it moves. That's not it. This is not a cold front. D. A warm air mass collides with a stationary cold air mass, and slides under it. That's not it. Warm air masses slide over cold air masses. Global Incorrect Feedback The correct answer is: A warm air mass catches up to a moving cold air mass, sliding over it. -------------------------------------------------------------------------------- Question 2c of 10 ( 2 Air Masses and Fronts 250878 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What happens in a stationary front? Choice Feedback *A. A cold air mass and a warm air mass meet, with neither moving. That's correct! B. A cold air mass catches up to a moving warm air mass. That's not it. Cold air masses slide under warm air masses. C. A warm air mass catches up to a moving cold air mass, sliding over it. That's not it. This is not a cold front. D. A warm air mass collides with a stationary cold air mass, and slides under it. That's not it. Warm air masses slide over cold air masses. Global Incorrect Feedback The correct answer is: A cold air mass and a warm air mass meet, with neither moving. -------------------------------------------------------------------------------- Question 3a of 10 ( 3 Air Masses and Fronts 185437 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: occluded, ocluded, accluded, acluded, oclluded, occluded front, ocluded front, acluded front, accluded front Question: When a cold air mass catches up with a warm air mass, the result is often a(n) _____ front. Attempt Incorrect Feedback 1st That's not it. This type of front often happens at the end of a storm. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: occluded. -------------------------------------------------------------------------------- Question 3b of 10 ( 3 Air Masses and Fronts 250897 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: stationary Question: Sometimes upper level winds cause a ________ front to break up, ending days of gray skies. Attempt Incorrect Feedback 1st That's not it. This is a front that is not moving. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: stationary. -------------------------------------------------------------------------------- Question 3c of 10 ( 3 Air Masses and Fronts 250898 ) Maximum Attempts: 1 Question Type: Text Fill In Blank Maximum Score: 5 Is Case Sensitive: false Correct Answer: occluded, ocluded, accluded, acluded, oclluded, occluded front, ocluded front, acluded front, accluded front Question: A front that spirals counterclockwise in the Northern Hemisphere is called a(n) _______ front. Attempt Incorrect Feedback 1st That's not it. This type of front often happens at the end of a storm. Correct Feedback That's correct! Global Incorrect Feedback The correct answer is: occluded. -------------------------------------------------------------------------------- Question 4a of 10 ( 1 Clouds 185439 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is the dew point? Choice Feedback *A. The temperature at which a gas condenses. That's correct! B. The density at which a gas evaporates. That's not it. Density is not the correct quantity. C. The temperature at which a gas deposits. That's not it. The dew point is not related to the deposition of water. D. The time of day when gas condenses. That's not it. The dew point is not related to the time. Global Incorrect Feedback The correct answer is: The temperature at which a gas condenses. -------------------------------------------------------------------------------- Question 4b of 10 ( 1 Clouds 250879 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Water vapor in the air condenses into liquid droplets when the water reaches ______. Choice Feedback *A. its dew point That's correct! B. its critical elevation That's not it. There is no such thing as critical elevation. C. a cold front That's not it. This is not correct. D. a warm front That's not it. This is not correct. Global Incorrect Feedback The correct answer is: its dew point. -------------------------------------------------------------------------------- Question 4c of 10 ( 1 Clouds 250880 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: If the air near the ground has enough moisture and the temperature reaches the dew point, _____ forms. Choice Feedback *A. fog That's correct! B. clouds That's not it. This is the not the correct term for when they are near the ground. C. sublimation That's not it. Sublimation is not related. D. a warm front That's not it. This does not form a front. Global Incorrect Feedback The correct answer is: fog. -------------------------------------------------------------------------------- Question 5a of 10 ( 2 Clouds 250873 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which type of cloud is tall and associated with thunderstorms? Choice Feedback *A. Cumulonimbus That's correct! B. Cumulus That's not it. These are the clouds that look like puffy cotton balls. C. Stratus That's not it. These are uniform, flat gray clouds. D. Cirrus That's not it. These are high, wispy clouds. Global Incorrect Feedback The correct answer is: Cumulonimbus. -------------------------------------------------------------------------------- Question 5b of 10 ( 2 Clouds 250881 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which type of cloud resembles a puffy cotton ball? Choice Feedback *A. Cumulus That's correct! B. Cumulonimbus That's not it. These are tall thunderstorm clouds. C. Stratus That's not it. These are uniform, flat gray clouds. D. Cirrus That's not it. These are high, wispy clouds. Global Incorrect Feedback The correct answer is: Cumulus. -------------------------------------------------------------------------------- Question 5c of 10 ( 2 Clouds 250882 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is a type of clouds that creates a uniform, flat gray sky? Choice Feedback *A. Stratus That's correct! B. Cumulus That's not it. These are the clouds that look like puffy cotton balls. C. Cumulonimbus That's not it. These are tall thunderstorm clouds. D. Cirrus That's not it. These are high, wispy clouds. Global Incorrect Feedback The correct answer is: Stratus. -------------------------------------------------------------------------------- Question 6a of 10 ( 3 Clouds 185445 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following is true of high clouds? Choice Feedback A. They are composed mostly of liquid water. That's not it. They are composed mostly of icy water. B. They generally produce hail and tornadoes. That's not it. High clouds do not usually produce hail and tornadoes. *C. They do not usually bring precipitation. That's correct! D. They eventually evaporate to form fog. That's not it. Fog does not form from evaporation. Global Incorrect Feedback The correct answer is: They do not usually bring precipitation. -------------------------------------------------------------------------------- Question 6b of 10 ( 3 Clouds 250883 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following is true of high clouds? Choice Feedback A. They cause most precipitation. That's not it. They usually do not produce precipitation. B. They generally produce lightning. That's not it. High clouds do not usually produce lightning. *C. They are composed mostly of icy water. That's correct! D. They are the result of sublimation. That's not it. Sublimation does not form clouds. Global Incorrect Feedback The correct answer is: They are composed mostly of icy water. -------------------------------------------------------------------------------- Question 6c of 10 ( 3 Clouds 250884 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following is true of clouds at medium altitudes? Choice Feedback A. They do not bring precipitation. That's not it. They can bring precipitation. B. They are the result of occluded fronts. That's not it. This is not true. *C. They are composed mostly of liquid water. That's correct! D. They are the cause of fog. That's not it. Fog is not caused by these clouds. Global Incorrect Feedback The correct answer is: They are composed mostly of liquid water. -------------------------------------------------------------------------------- Question 7a of 10 ( 3 Extreme Weather Events 185446 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is not part of the recipe for a thunderstorm to form? Choice Feedback A. A lifting force That's not it. A lifting force is necessary. B. Moisture in the atmosphere That's not it. Moisture in the atmosphere is necessary. C. Updrafts That's not it. An updraft is necessary. *D. Cool air rising through warm air That's correct! Global Incorrect Feedback The correct answer is: Cool air rising through warm air. -------------------------------------------------------------------------------- Question 7b of 10 ( 3 Extreme Weather Events 250885 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is not part of the recipe for a thunderstorm to form? Choice Feedback A. A lifting force That's not it. A lifting force is necessary. B. Moisture in the low atmosphere That's not it. Moisture in the atmosphere is necessary. C. Unstable air That's not it. Unstable air is necessary. *D. A cold front advancing That's correct! Global Incorrect Feedback The correct answer is: A cold front advancing. -------------------------------------------------------------------------------- Question 7c of 10 ( 3 Extreme Weather Events 250886 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which is not part of the recipe for a thunderstorm to form? Choice Feedback A. A lifting force That's not it. A lifting force is necessary. B. Moisture in the lower to middle levels of the atmosphere That's not it. Moisture in the atmosphere is necessary. C. Rising air That's not it. Rising air is necessary. *D. A stationary front That's correct! Global Incorrect Feedback The correct answer is: A stationary front. -------------------------------------------------------------------------------- Question 8a of 10 ( 2 Extreme Weather Events 185447 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why do hurricanes lose strength once they reach the land? Choice Feedback A. Friction with the ground stops hurricane spinning. That's not it. Friction does not stop a hurricane. B. Hurricanes can't replenish their water from the ground. That's not it. Hurricanes do not pick up water from the ground. *C. Hurricanes gain strength from the warmth of the ocean water. That's correct! D. Hurricanes lose strength when they reach a warm front on land. That's not it. Hurricanes are not stopped by warm fronts on land. Global Incorrect Feedback The correct answer is: Hurricanes gain strength from the warmth of the ocean water. -------------------------------------------------------------------------------- Question 8b of 10 ( 2 Extreme Weather Events 250887 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What do hurricanes use to gain strength? Choice Feedback A. The warmth of land masses That's not it. Hurricanes lose strength over land masses. B. Occluded fronts over land masses That's not it. Hurricanes lose strength over land masses. *C. The warmth of the ocean water That's correct! D. Occluded fronts over the ocean That's not it. Hurricanes do not gain energy from occluded fronts. Global Incorrect Feedback The correct answer is: The warmth of the ocean water. -------------------------------------------------------------------------------- Question 8c of 10 ( 2 Extreme Weather Events 250888 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: A hurricane forms when a ______ gains strength over ocean waters. Choice Feedback A. typhoon That's not it. A typhoon is a hurricane that occurs in the Pacific Ocean. B. polar storm That's not it. There is no such thing as a polar storm. *C. tropical depression That's correct! D. occluded front That's not it. Hurricanes do not form from occluded fronts. Global Incorrect Feedback The correct answer is: tropical depression. -------------------------------------------------------------------------------- Question 9a of 10 ( 2 Extreme Weather Events 185448 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Why do tornadoes form mostly in the Great Plains states? Choice Feedback A. There are no mountains in the Great Plains to prevent tornadoes. That's not it. Mountains do not prevent tornadoes. *B. The Great Plains are where cool, dry air meets warm, moist air. That's correct! C. The Great Plains are furthest from the ocean. That's not it. D. Tornadoes only form in arid climates. That's not it. Tornadoes can form anywhere. Global Incorrect Feedback The correct answer is: The Great Plains are where cool, dry air meets warm, moist air. -------------------------------------------------------------------------------- Question 9b of 10 ( 2 Extreme Weather Events 250889 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following causes tornadoes? Choice Feedback A. condensation That's not it. Condensation does not cause tornadoes. *B. wind shear That's correct! C. stationary fronts That's not it. D. dry climates That's not it. Tornadoes can form anywhere. Global Incorrect Feedback The correct answer is: wind shear. -------------------------------------------------------------------------------- Question 9c of 10 ( 2 Extreme Weather Events 250890 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: Which of the following causes tornadoes? Choice Feedback A. Typhoons losing energy over land That's not it. Typhoons are unrelated to tornadoes. *B. Cool, dry air meeting warm, moist air That's correct! C. Cool, moist air meeting warm, dry air That's not it. D. Eastern air meeting western air That's not it. Global Incorrect Feedback The correct answer is: Cool, dry air meeting warm, moist air. -------------------------------------------------------------------------------- Question 10a of 10 ( 2 Extreme Weather Events 185449 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is lightning? Choice Feedback A. The flow of light between a cloud and the ground. That's not it. Lightning is not actually composed of light. B. The rapid flow of air between a cloud and the ground. That's not it. Lightning is not the flow of air. *C. The flow of electricity between a cloud and the ground. That's correct! D. The release of sound between a cloud and the ground. That's not it. Lightning causes a sound, but lightning is not made of sound. Global Incorrect Feedback The correct answer is: The flow of electricity between a cloud and the ground. -------------------------------------------------------------------------------- Question 10b of 10 ( 2 Extreme Weather Events 250891 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What causes lightning? Choice Feedback A. Buildup of light in a cloud That's not it. Lightning is not actually composed of light. B. Buildup of pressure in a cloud That's not it. Lightning is not caused by pressure. *C. Buildup of charge in a cloud That's correct! D. Buildup of sound energy in a cloud That's not it. Lightning causes a sound, but lightning is not made of sound. Global Incorrect Feedback The correct answer is: Buildup of charge in a cloud. -------------------------------------------------------------------------------- Question 10c of 10 ( 2 Extreme Weather Events 250892 ) Maximum Attempts: 1 Question Type: Multiple Choice Maximum Score: 5 Question: What is the cause of lightning? Choice Feedback A. Varying air pressure underneath a cloud That's not it. Lightning is not caused by air pressure differences. B. Airflow between a cloud and the ground That's not it. Lightning is not the flow of air. *C. Different charges on the ground and the bottom of a cloud That's correct! D. The different elevations of a cloud and the ground That's not it. Elevation differences do not cause lightning. Global Incorrect Feedback The correct answer is: Different charges on the ground and the bottom of a cloud. --------------------------------------------------------------------------------