Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
30 Cards in this Set
- Front
- Back
|
What is an air mass?
|
a huge body of air with uniform temperature and humidity
|
|
|
What is a source region?
|
a region with relatively uniform temperature and humidity over which air masses form.
Can't be in a windy area. |
|
|
What is an arctic (A) air mass?
|
an air mass from an extremely cold area
|
|
|
What is a polar (P) air mass?
|
an air mass from a cool or cold area
|
|
|
What is a tropical (T) air mass?
|
an air mass from warm or hot areas
|
|
|
What is a continental (c) air mass?
|
an air mass that forms over land
|
|
|
What is a maritime (m) air mass?
|
an air mass that forms over oceans
|
|
|
What are the 5 general types of air masses?
|
continental arctic (cA)
continental polar (cP) continental tropical (cT) maritime polar (mP) maritime tropical (mT) |
|
|
Where do continental polar air masses form over?
|
Canada
|
|
|
Where do maritime polar air masses usually form over?
|
North Atlantic or North Pacific
|
|
|
Where do tropical air masses come from?
|
the south
|
|
|
Where do maritime tropical air masses come from?
|
the tropical Pacific, the tropical Atlantic, and the Caribbean
|
|
|
Where do continental tropical air masses come from?
|
Mexico
|
|
|
What kind of weather does a continental tropical air mass from Mexico bring with it?
|
dry, warm weather
|
|
|
What kind of weather does a continental polar air mass from Canada bring with it?
|
dry, cold conditions. During the summer, continental polar air masss bring clear, cool weather. In winter, they bring cold spells that last for weeks.
|
|
|
What kind of weather does a maritime polar air mass from the ocean bring with it?
|
humid and cool or cold air.
|
|
|
What kind of weather does a maritime tropical air mass bring with it?
|
hot, muggy spells to the center and southeastern US in summer. Sometimes thundershowers and tornadoes. In winter - mild and cloudy weather.
|
|
|
Are warm air masses warmer or colder than the surfaces over which they pass?
|
warmer
|
|
|
Are cold air masses warmer or colder than the surfaces over which they pass?
|
colder
|
|
|
Is a polar air mass a cold or warm air mass?
|
cold
|
|
|
Is a tropical air mass a cold or warm air mass?
|
warm
|
|
|
Do two different air masses usually mix when they meet?
|
no
|
|
|
What are fronts?
|
The boundary surface between 2 air masses that are not the same.
|
|
|
True or false? Colder, more dense air moves under warmer, less dense air (like a wedge).
|
true
|
|
|
What is a stationary front?
|
Happens when 2 air masses that aren't the same just sit in an area. Neither moves. Weather doesn't change for several days.
|
|
|
What is a warm front?
|
when warmer air replaces colder air
|
|
|
What is a cold front?
|
when colder air replaces warmer air
|
|
|
Do warm fronts usually cause rain?
|
Yes. The warm air cools as it rises and a long, steady rain will usually cover a large area.
|
|
|
Do cold fronts cause scattered heavy showers that last only a little while?
|
Yes
|
|
|
What is a squall line?
|
a line of violent thunderstorms that occur just before a cold front arrives
|
