GSC 103 NEW EXAM 3 WITH COMPLETE SOLUTIONS 100%
VERIFIED!!
Why is there wind?
Air near the surface is heated and rises, cooler air comes in to replace hot rising air and
this movement of air results in winds
Hadley Circulation Cells
Drags air directly north to south or south to north (depends on what side of the equator
you're on)
Intertropical Convergence Zone (ITCZ)
the area encircling the earth near the equator where the northeast and southeast trade
winds come together
Coriolis effect
a deflection of moving objects when the motion is described relative to a rotating
reference frame
(when you try to move stuff across the Earth's surface, it will deflect to one side)
only effects things moving relatively slowly over long distances like ocean and wind
currents
Saltation
Most grain movements in deserts occur by saltation (the transportation of sand through
wind)
Sand Dunes
,Formation:
Sand Saltates up the windward side of a dune
If the lee side exceeds its Angle of Repose, the sand slips down the Slip Face
Ergs
Vast tracks of shifting sand found in deserts (sand seas)
Loess
Develops where silt is deposited in large amounts
Deflation
Wind can erode surfaces in two ways, Deflation and Abrasion
In Deflation, smaller particles are picked up and moved, but larger rocks remain
Desert pavement
desert surface covered with closely packed, interlocking angular or rounded rock
fragments of pebble and cobble size
Five types of desert:
subtropical
continental
, rainshadow
coastal
polar
subtropical desert
formed in subtropics by Hadley cells bringing very dry air
continental desert
exist because they are too far from any source of water vapor to get any rain
rainshadow desert
occur on the Lee Side of mountain ranges
much of the desert in the western US, and the low rainfall in the plains, is due to the rain
shadow effect of the mountains in the US west
coastal desert
exist on the western coasts of continents where there are usually cold currents
polar desert
caused by low-moisture, cold air
VERIFIED!!
Why is there wind?
Air near the surface is heated and rises, cooler air comes in to replace hot rising air and
this movement of air results in winds
Hadley Circulation Cells
Drags air directly north to south or south to north (depends on what side of the equator
you're on)
Intertropical Convergence Zone (ITCZ)
the area encircling the earth near the equator where the northeast and southeast trade
winds come together
Coriolis effect
a deflection of moving objects when the motion is described relative to a rotating
reference frame
(when you try to move stuff across the Earth's surface, it will deflect to one side)
only effects things moving relatively slowly over long distances like ocean and wind
currents
Saltation
Most grain movements in deserts occur by saltation (the transportation of sand through
wind)
Sand Dunes
,Formation:
Sand Saltates up the windward side of a dune
If the lee side exceeds its Angle of Repose, the sand slips down the Slip Face
Ergs
Vast tracks of shifting sand found in deserts (sand seas)
Loess
Develops where silt is deposited in large amounts
Deflation
Wind can erode surfaces in two ways, Deflation and Abrasion
In Deflation, smaller particles are picked up and moved, but larger rocks remain
Desert pavement
desert surface covered with closely packed, interlocking angular or rounded rock
fragments of pebble and cobble size
Five types of desert:
subtropical
continental
, rainshadow
coastal
polar
subtropical desert
formed in subtropics by Hadley cells bringing very dry air
continental desert
exist because they are too far from any source of water vapor to get any rain
rainshadow desert
occur on the Lee Side of mountain ranges
much of the desert in the western US, and the low rainfall in the plains, is due to the rain
shadow effect of the mountains in the US west
coastal desert
exist on the western coasts of continents where there are usually cold currents
polar desert
caused by low-moisture, cold air
