Erosion
I. Erosion
a. Weathered material
moved from one place to
another
i. Weathering/weathered
material
1. breaking down of
rocks on Earth’s
surface
a. wind, rain, sun, hail,
fires, tornadoes,
hurricanes, earthquakes,
tsunami, landslide/mudflow
II. Agents of Erosion
a. Running Water
b. Glaciers
c. Waves  sand onto and
off of the beach
d. Wind sand, dirt and
dust
e. Gravity
III.Deposition
a. Weathered material
carried by 5 agents
i. Running water
ii. Glaciers
iii. Waves
iv. Wind
v. Gravity
b. Build landforms on Earth
Gravity and Erosion
I. Gravity
a. Pulls things to center of
the Earth (ground/floor)
i. Causes materials at a
higher elevation to move
to a lower elevation
(down)
b. Can cause rivers to flow
into ocean
c. Mass movement
i. Downhill movement of
weathered material
caused by gravity
d. Landslide
i. Rapid movement of rocks
down a hillside
e.
Mudflow/Mudslide
i. Rapid movement of mud
down a hillside
Wind and Erosion
I. Deflation
a. When loose rocks are
removed from Earth’s
surface by wind
i. Most commonly found in:
1. Deserts
2. Plowed fields
3. beaches
b. wind=energy
II. Abrasion
a. Process by which rocks
and soil are worn away
from particles carried by
wind and water.
i. Sand paper on
rock=abrasion
Running Water and Erosion
I. Running Water
a. Changes Earth’s surface
more than any other agent.
i. River
ii. Waterfalls
iii. Streams
iv. Runoff
1. rainwater that
flows into rivers and
streams
II. Runoff and Erosion
a. Running water carries
away soil particles
III.Formation of a River
a. Usually forms in/on hills
or mountains
i. Rain=too much water
ii. When it cannot soak into
the ground
createsoverflow
iii. Erode soil and forms a
channel
iv. Channels form streams
v. Streams join other
streams and form larger
streams
vi. Form tributaries
vii. Streams then form into
the main river
viii. River System or River