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Exam 4
PASS!
34
Geology
12th Grade
04/07/2015

Additional Geology Flashcards

 


 

Cards

Term
Why Does Wind Blow?
Definition
Horizontal differences in pressure cause air to move
Term
What Triggers Wind?
Definition
Movement of air. Warm air rising, cool air replacing warm air
Term
How do we measure air pressure?
Definition
Lb/in2
Term
Why does air pressure decrease with height?
Definition
Number of air molecules decreases with height
Term
What is Standard Sea level Pressure?
Definition
14.7 lb/in 2
Term
Pressure Gradient Force
Definition
Due to differences in pressure within the atmosphere that causes air to move
Term
Coriolis Force
Definition
Deflection of wind due to earths rotation
Term
Friction Force
Definition
Influenced by friction of wind on earths surface and the objects on it
Term
Geostrophic Winds
Definition
Horizontal winds in a straight line parallel to isobars at a constant speed
Term
How does a steep pressure gradient appear on a map?
Definition
Closely spaced isobars
Term
Distinguish a trough vs a ridge on a map
Definition
Troughs bend down, Ridges bend up
Term
Describe how winds blow around highs and lows near the surface in the northern hemisphere
Definition
Into low pressure center counter clockwise, from high pressure clockwise
Term
Microscale
Definition
Smallest scale of motion, blows smoke and dust
Term
Mesoscale
Definition
medium scale, causes thunderstorms
Term
Synoptic Scale
Definition
3rd biggest
Term
Planetary (Global) Scale
Definition
Covers the entire earth
Term
Macroscale
Definition
Combines Planetary and Synoptic
Term
Jetstream
Definition
Strong winds in narrow bands
Term
Subtropical Jet Stream
Definition
Near 30 degrees latitude
Term
Polar Front Jet Stream
Definition
Near the polar front
Term
Low Level Stream
Definition
Forms at night with temperature inversion
Term
Three Cell Model
Definition
Hadley, Ferrel Cell, Polar Cell
Term
Doldrums
Definition
Light winds, weak gradients around the equator
Term
Single Cell Model
Definition
Hadley Cell driven by energy of sun as warm air rises and cold air goes down
Term
Thermal Cicrulation
Definition
Heating and cooling of atmosphere near the ground
Term
Mountain Breeze
Definition
Cool air drains into the valley at night, blows downhill at night
Term
Valley Breeze
Definition
Blows up hill at day, warm air
Term
Santa Ana Winds
Definition
Hot and dry, blow from east off the elevated desert
Term
Katabatic Winds
Definition
Downslope flow of cold, dense air
Term
Chinook Winds
Definition
Warm and dry, descending rocky mountains
Term
Haboob
Definition
Desert wind, dust storm, downdraft of desert thunderstorm
Term
Harmattan
Definition
Over winter in Sahara desert
Term
Dust Devil
Definition
Clear, dry, hot afternoon
Term
Sea Breeze vs Land Breeze
Definition
Sea Breeze stronger than land breeze
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