chapter 21 Word Scramble

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Question	Answer
What are differences in air pressure caused by?	unequal heating of Earth's Surface
What receives more solar energy, the region by the equator or the region by the poles?	the region along the equator
The heated equatorial air rises and creates what?	a low pressure center
Cold air near the poles sink and this creates what?	high pressure centers
What creates wind patterns?	Differences in air pressure at different locations on Earth
How does air move?	from areas of high pressure to areas of low pressure
If air moves from high pressure to low pressure how does air move (use equator and poles in the answer)	in general, surface air moves from the poles the the equator
why does air move from the poles to the equator	air moves from high pressure (poles) to low pressure (equator)
When does surface air not move from high pressure to low pressure	at high altitudes the warm air from the equator to the poles
Temperature and pressure differences on Earth's surface creates what?	three wind belts in the Northern Hemisphere and three wind belts in the Southern Hemisphere
What are wind belts influenced (or affected) by?	Coriolis effect
What is the Coriolis effect	an effect whereby a mass moving in a rotating system experiences a force (the Coriolis force ) acting perpendicular to the direction of motion and to the axis of rotation.
When does the Coriolis effect occur?	when winds are deflected by Earth's rotation
The processes that affect air movement also influence what?	storms
When air pressure differences are small the air remains relatively __________	stationary
If the air moves slowly over a uniform region, it takes on the characteristic _______ and ______ of that region	temperature and humidity
A What is the definition of air mass?	a large body of air throughout which temperature and moisture content are similar
Describe air masses that form over frozen polar regions	very cold and dry
Describe air masses that form over tropical oceans	they are warm and moist
The motion of Earth's atmosphere can lead to the formation of what	powerful storms such as Hurricane Katrina
How are air masses classified?	according to their source regions
The source regions determine the ______ and ______ of the air masses	temperature and humidity
The source regions for cold air masses are ____ areas	polar areas
The source region for warm air masses are _____ areas	tropical areas
Air masses that form over land are called what	continental
Air masses that form over oceans are called what	maritime
Continental air masses are _____	dry
Maritime air masses are ______	moist
Tropical air masses are _______	warm
Polar air masses are	cold
What is the symbol used to mean continental air mass	c
What is the symbol used to mean Maritime air masses	m
What is the symbol used to mean tropical air masses	T (capital T)
What is the symbol used to mean Polar air masses	P (capital P)
Continental air masses form over large ________	landmasses
give 3 examples of where a continental air mass might form	1. northern Canada 2. northern Asia 3. southwestern United States
Because continental air masses form over land the level of humidity is ______	very low
An air mass may remain over its source for how long?	for days or weeks
Air masses will eventually move into other regions because of what?	global wind patterns
In general continental air masses bring what kind of weather conditions when they move into another region	dry weather conditions
There are two types of continental air masses. What are they	1. continental polar (cP) 2. continental tropical (cT)
Continental polar air masses are what	cold and dry
Continental tropical air masses are what	warm and dry
Where do maritime air masses form	over oceans and other large bodies of water
maritime air masses take on the characteristics of what?	the water over which they form
The humidity in maritime air masses are ______ then the humidity in continental air masses	higher
When maritime air masses (which are high humidity) travel to a new location they bring what type of weather?	precipitation and fog
What are the two types of maritime air masses?	1. maritime polar (mP) 2. maritime tropical (mT)
Maritime polar air masses are what?	moist and cold
maritime tropical air masses are what?	moist and warm
The four types of air masses that affect the weather of North America come from what 6 locations?	1. Continental polar Canadian 2. Continental tropical 3. Maritime polar Pacific 4. Maritime polar Atlantic 5. Maritime tropical Pacific 6. Maritime tropical Atlantic
cP (continental polar) air mass comes from what source location	polar regions in Canada
the cP air mass moves in which direction	south-southeast
the cP air mass brings what type of weather	cold and dry
the mP (maritime Polar) air mass comes from what source locations?	polar Pacific and polar Atlantic
the mP air mass moves in what directions	southeast; southwest-south
the cT (continental tropical) air masses come from what source locations	U.S. southwest
the cT (continental tropical) air masses move in what direction	north-northeast
What weather does the cT air masses bring	warm and dry
the mT (maritime tropical) air masses come from what source locations	tropical Pacific and tropical atlantic
What direction do the mT air masses move	northeast; north-northwest
What type of weather does the mT air masses bring	warm and moist
Continental tropical air masses form over the ______ of the southwestern United States	deserts
the continental tropical air masses bring what type of weather in the summer	dry hot weather
true or false The continental tropical air masses do not form in the winter	true
Maritime tropical air masses form over what three bodies of water?	1. warm water of the tropical Atlantic ocean 2. Caribbean Sea 3. Gulf of Mexico
The Maritime tropical air masses bring what type of weather to the Eastern United states in the winter	mild, cloudy weather
In the summer Maritime tropical air masses bring what type of weather	hot humid weather and thunderstorms
Maritime tropical air masses do not usually reach what coast	pacific coast
In the winter maritime tropical air masses bring what weather to the coast and southwestern deserts?	moderate precipitation
Polar air masses from what three regions influence weather in North America	1. northern Canada 2. northern Atlantic Ocean 3. northern Pacific ocean
Continental polar air masses form over what type of land	ice and snow-covered land
continental polar air masses move into Northern United states and can occasionally reach as far south as the ____________________	Gulf Coast of the United States
In the summer continental polar air masses bring what type of weather	cool dry weather
In the winter the continental polar air masses bring what type of weather	very cold weather to the northern united states
Where do Maritime polar air masses form	over the North Pacific Ocean
Describe the weather the Maritime polar air masses bring	summer - very moist cool foggy weather winter - bring rain and snow to the pacific coast
Maritime polar Atlantic air masses usually move _______ toward ________	Eastward; Europe (sometimes they can move west toward U.S. East coast
when Maritime polar Atlantic occasionally moves toward the west, what type of weather does it bring?	winter - cold, cloudy and snow Summer - cool weather, low clouds, and fog

Created by: kellyaem