weathering erosion deposition -breaks down the earth - moves the earth – drops off, to build the...
TRANSCRIPT
Weathering
ErosionDeposition
-breaks down the Earth
- moves the Earth– drops off, to build the Earth
How does weathering, erosion, & How does weathering, erosion, & deposition act in a cycle to deposition act in a cycle to change the Earth’s surface?change the Earth’s surface?
Must occur before erosion can happen
No movement is involvedTwo types: Mechanical & Chemical Sediments- small/tiny pieces of
weathered down rock.
The breaking down of rocks into smaller pieces
What is Weathering?What is Weathering?
Physical/Mechanical weathering … the breaking down of rocks into smaller pieces with out
changing the material
Physical Weathering -- The steep walls here were carved out by moving water
Palo Duro Canyon in the High Plains Eco-Region
What is Physical What is Physical Weathering?Weathering?
Enchanted Rock in the Llano Uplift Eco-region
5. Exfoliation-warming and cooling of rocks over time causes rocks to peel into sheets
Physical WeatheringPhysical Weathering1. Animal burrowing2. Plant Roots3. Ice Wedging4. Abrasion
3. This cave was formed by slightly acidic water
dissolving the limestone (carbonic acids)
Chemical weathering … dissolving and changing the minerals in rocks into new ones.1. Oxidation-Rusting 2. Plant Acids
What is Chemical What is Chemical Weathering?Weathering?
Example Cause of Erosion
Waves eroding the beach and East TX shoreline
Water
Desert Sandstorm in West TX from drought
Wind
Rain causing Mudslide in the Rolling Hills of Central TX
Water & Gravity
Landslide on sides of Plateaus of Central TX
Gravity
Rain carrying soil down a driveway
Water & Gravity
The movement of weathered earth materials by moving water, wind, gravity or ice (glaciers)
What is Erosion?What is Erosion?
How does removing plants effect the erosion on the left side of the hill?
Draw and answer the question
When eroded sediments are deposited in a new location Example: delta -- where sediment is deposited where a river flows into an ocean or lake builds up a landform
Before After
What is Deposition?What is Deposition?1.1.DeltaDelta2.2.MountainsMountains3.3.Sand DunesSand Dunes4.4.PlateauPlateau