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Weathering, Erosion and Deposition

Lesson #3 Observation
by

Lawrence Beck

on 4 September 2013

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Transcript of Weathering, Erosion and Deposition

Weathering and
Erosion

Weathering
Flowing
Water
Erosion
Slow process that breaks rocks down into smaller pieces
Physical-changes size and shape
Chemical-changes mineral make up
Weathering and removal of rock or soil
Causes:
Rivers Erode/Shape the Land
Deposition
Water
Wind
Gravity
Glaciers
Rivers and streams pick up bits of rock and soil as they flow over land
Deposited on riverbanks or carried to the mouth of a river
Colorado River
landform that is formed at the mouth of a river, where the river flows into an ocean, sea, lake, or reservoir
Delta
Dropping off of weathered rock by water or wind
Riverbank
Beach
Sand Dune
Grand Canyon
is shaped by the
Causes of Weathering
Rain
Wind
Types of Weathering
Physical
Chemical
Waves crashing cliff breaks off pieces of land
Rainfall freezes and widens cracks
Flowing water smooths out rocks
Plant roots crack rock
Water and carbon dioxide creates limestone caves
Water and oxygen cause the rusting of iron chains
What did you see? What happened?
Terms: Physical Weathering, Chemical Weathering, Erosion, Deposition
Evidence of Weathering and Erosion Around School
Type:
Physical Weathering
Chemical Weathering
Erosion
Possible Cause:
Water
Wind
Gravity
Metal rusting
Sidewalks broken by tree roots, Roads broken up and potholes formed by freezing and thawing
Key Terms
In your own words, explain...
Weathering- when rocks are broken into smaller rocks
Physical-changes in shape and size
Chemical- changes in mineral make-up (color or rusting)
Erosion-wind, water, gravity, or glaciers move something
Deposition-the dropping off of picked up soil, rock, or dirt to another place
Goal:
Today, our goals are to verbally describe weathering and erosion as well as find evidence of these two processes of change on the Earth's surface around the school.
Thumbometer
UP -- I met today's goals

SO-SO -- I have partially met today's goals

DOWN -- I need some more time to
meet today's goals
What did you find?
Physical Weathering

Chemical Weathering

Erosion
Key Terms
In your own words, explain...
Weathering-

Physical-

Chemical-

Erosion-

Deposition-
Biological - changes due to biological activity
Biological
Full transcript