Test 7 Flashcards
type of UV radiation that is only partially absorbed by the ozone layer allowing some of it to reach the earth’s surface
UVB
Portion of earths magnetic field stretches away from the sun
magnetotail
How does air normally move in the atmosphere
High-pressure to low pressure
what global winds occur at the Earth surface in high altitudes
polar easterlies
name given to the upper atmosphere because of its distant layers
heterosphere
at what point of the earths elliptical orbit does earth receive the greatest amount of insolation
perihelion
normal value of atmospheric pressure at sea level
1013 millibars
Coldest point in the atmosphere
mesopause
Which temperature layer of the atmosphere contains the ozone layer
stratosphere
Which type of current causes most of the earths weather
convection current
Which atmospheric layer is the least understood
mesosphere
at the equator air rises and begins traveling outward toward the poles. why does this air sink back to earth long before it reaches poles
The air is cooled by low temperatures and high altitudes
Most important and abundant greenhouse gas
water vapor
The US government broadcast the official time for the country using a shortwave radio station in Colorado. how can these broadcast be throughout the lower 48 States
Radio waves bounce off the ionosphere
Why do cyclones in the southern hemisphere rotate the opposite direction from cyclones in the northern hemisphere
The Coriolis effect bends the winds in different directions
why does a Compass always point north
The compass points toward magnetic poles
why is afternoon usually the warmest part of the day
Trapped heat remains in the atmosphere
Downsloping wind caused by cooling air near slope
Katabotic winds
cool gentle wind blowing in from the water to the land
Seabreeze
Wind the occurs when a large amount of dense cold air spills over a mountain range
fall wind
Wind that occurs when warm air over open terrain rises drawing cooler air from under trees
Forest breeze
Area where the solar wind interacts with earths magnetic field
Magnetosphere
High altitude winds that are concentrated in narrow meandering bands of rapidly moving air
Jet-streams
amount of energy available to heat earth land, water and air
Energy budget
Aurora that occur in southern latitudes
Australis