PHS 1010 Earth Science Huff chp. 19 terms

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Last updated 2:34 AM on 5/2/26
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35 Terms

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Air masses

large bodies of air that have similar temperature and moisture characteristics

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Source region

the area where an air mass acquires its properties

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Polar

(P)

2 multiple choice options

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Tropical

(T)

2 multiple choice options

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Continental

(c)

2 multiple choice options

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Maritime

(m)

2 multiple choice options

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Continental polar (cP)

dry and cold

<p>dry and cold</p>
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Continental tropical (cT)

dry and warm

<p>dry and warm</p>
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Maritime polar (mP)

humid and cold

<p>humid and cold</p>
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Maritime tropical (mT)

humid and warm

<p>humid and warm</p>
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Front

boundary that separates air masses of different densities

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Warm front

warm air replaces cooler air

3 multiple choice options

<p>warm air replaces cooler air</p><p>3 multiple choice options</p>
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Cold front

cold air replaces warm air; cold air wedges or shovels warm up and out of the way

3 multiple choice options

<p>cold air replaces warm air; cold air wedges or shovels warm up and out of the way</p><p>3 multiple choice options</p>
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Stationary front

flow of air on both sides of the front is almost parallel to the line of the flow; surface position of the front does not move causing the front to be stationary in one place

3 multiple choice options

<p>flow of air on both sides of the front is almost parallel to the line of the flow; surface position of the front does not move causing the front to be stationary in one place</p><p>3 multiple choice options</p>
15
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Occluded front

Active cold front overtakes a warm front (due to cold front moving faster than the warm front); cold air wedges the warm air upward

3 multiple choice options

<p>Active cold front overtakes a warm front (due to cold front moving faster than the warm front); cold air wedges the warm air upward</p><p>3 multiple choice options</p>
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Mid-latitude cyclone

form along a front where air masses are moving parallel to the front in opposite directions

2 multiple choice options

<p>form along a front where air masses are moving parallel to the front in opposite directions</p><p>2 multiple choice options</p>
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Cumulus stage

beginning stage of thunderstorm

1 multiple choice option

<p>beginning stage of thunderstorm</p><p>1 multiple choice option</p>
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Mature stage

thunderstorm is occurring/most active stage: requires a continuous supply of warm air and moisture where each surge causes air to rise higher producing cumulonimbus clouds

1 multiple choice option

<p>thunderstorm is occurring/most active stage: requires a continuous supply of warm air and moisture where each surge causes air to rise higher producing cumulonimbus clouds</p><p>1 multiple choice option</p>
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Dissipating stage

thunderstorm is decreasing; occurs when the supply of warm, moist air is cut off within the cloud

2 multiple choice options

<p>thunderstorm is decreasing; occurs when the supply of warm, moist air is cut off within the cloud</p><p>2 multiple choice options</p>
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Gust front

a downdraft in front of a storm (can do damage; winds will often suddenly increases with a gust front)

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Cell

a single large cloud

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Supercells

associated with huge, isolated thunderstorms

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Tor:con index

a numerical system that gives the percent chance of a tornado occurring within a 50 mile radius

1 multiple choice option

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Tornado watch

to alert the public to the possibilty of tornadoes

2 multiple choice options

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Tornado warning

issued when a tornado is sighted or is indicated by weather radar

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Enhanced Fujita intensity scale

measures intensity

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Hurricane

most violent storms on earth due to their size

3 multiple choice options

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Tropical depression

winds do not exceed 61 km (38 mi) per hour

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Tropical storm

winds between 61 to 119 km (38 and 74 mi) per hour

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Typhoon

hurricane in the western pacific

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Cyclone (as a storm)

hurricane in the indian ocean and south pacific

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Eye

at the very center; about 20 km (12.5 mi) diameter

3 multiple choice options

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Eyewall

near the center

3 multiple choice options

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Saffir-Simpson scale

ranks the relative intensities of hurricanes

1 multiple choice option

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Storm surge

large dome of water 65 to 80 km (40 to 50 mi) wide sweeps across the coast where eye makes landfall

1 multiple choice option