Chapter 12 note sheet 2010 part 2 student

Agents of Erosion and
Deposition Chapter 12
Wind Erosion and
Deposition Chapter 12-2
The Process of Wind Erosion
_____________ eroding agent by itself, but has very dramatic impact on the
landscape over a long period of time.
 _____________ is the skipping and bouncing movement of sand or other
sediments, caused by _______ or _________.
 __________ sand grains knock into one another, bounce up into the air, fall
forward, and strike other sand grains, causing them to _______ and __________
The Process of Wind Erosion 2
_____________ is a form of wind erosion in which fine, dry soil particles
are blown away, removing the top layer of fine sediment or soil and leaving
behind rock fragments that are too heavy to be _____________ by the
Deflation may cause __________ _______________, which is a surface
consisting of pebbles and small broken rock.
Scooped-out depressions in the landscape are called __________ ___________.
The Process of Wind Erosion 3
 _____________ is the grinding and
wearing away of rock surfaces
through the mechanical action of
other rock or sand _____________.
 Abrasion commonly happens in
areas where there are ___________
__________, loose sand, and soft
 The blowing of millions of sharp
sand grains ____________ a
sandblasting effect, helping
erode, smooth, and polish rocks.
Wind Deposited Materials
Wind-Deposited Materials 2
 _________ is a deposit of
windblown, fine-grained
sediment. Usually formed
during _________ periods.
 ________: When the wind hits an
______, the wind slows down,
____________ the heavier material.
The material _____________, creating
an additional obstacle and eventually
forming a _____________ that buries
the original obstacle.
Because wind can carry finegrained material much higher
and farther than it carries
_______, loess deposits are
sometimes found far from their
 Very
______ and
The mounds of wind-deposited sand
are called ____________. A dune keeps
its shape, even though it moves.
 ________ move in the same
________________ the wind does.
Leeward slope
Wind-Deposited Materials 3
 The Movement of Dunes:
Different wind conditions
produce dunes in various
shapes and sizes. A dune
usually has a gently sloped
side and a steeply sloped
side, called a