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Physical Geography Test 3 > Chapter 7 > Flashcards

Chapter 7 Flashcards

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0
Q

Cold front

A

When advancing cold air mass meets & displaces warmer air.
Twice as steep as warm front.
Moves faster than warm front.
Lead to lots of precipitation in short time

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1
Q

What are the 4 types of fronts?

A

Cold
Warm
Stationary
Occluded

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2
Q

Warm front

A

When warm air mass meets colder air.

More gentle than cold front.

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3
Q

Stationary fronts

A

When neither air mass displaces the other

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4
Q

Occluded fronts

A

Formed when a cold overtakes a warm front.

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5
Q

Air masses

A

Large particles of air that are distinct from one another

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6
Q

Characteristics of air masses that make it recognized as distinct

A
  1. It must be large
  2. It must have uniform properties in all dimensions
  3. It must travel as a unit. Must not change as it moves through other air
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7
Q

How do air masses originate?

A

They stagnate overtop of a region for so long that they gain their properties.
Usually happens in high pressure areas

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8
Q

A- Antarctic

A

Very cold, dry & stable

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9
Q

Continental polar -cp

A

Cold, dry, very stable

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10
Q

Maritime polar- mp

A

Cold, moist, relatively unstable

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11
Q

continental tropical

A

Hot, very dry, unstable

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12
Q

Maritime tropical

A

Warm, most, varying stability

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13
Q

Equatorial

A

Warm, very moist, unstable

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14
Q

Low latitude air mass

A

Warm or hot

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15
Q

High latitude air mass

A

Cold or cool

16
Q

Midlatitude anticyclones

A

Larger than cyclones
Clockwise, divergent air flow
No fronts
Calm

17
Q

Midlatitude cyclones

A 
Migrate w to east
Usually form when cold & warm air meet.
1000 miles in diameter
Oval shape
Northern hemisphere
Counterclockwise
18
Q

Cyclogenesis

A

Birth of a cyclone

19
Q

Cyclogenesis lasts…

A

3 to 10 days

20
Q

Birth of cyclone ends when

A

Cold front catches up to warm front

21
Q

Occlusion

A

Death of cyclone. Once all warm air is pushed up, there’s no more instability

22
Q

Hurricanes get named once they reach

A

39 mph

23
Q

Considered a hurricane when

A

Reaches 74 mph

24
Q

Characteristics of hurricanes

A

Low pressure, high winds

warm & moist air rises

25
Q

No hurricanes within 3 degrees

A

Rare closer than 8 to 10 n/s of equator

26
Q

What’s a storm surge

A

Water 25 ft above normal

Physical Geography Test 3 (4 decks)

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