Weathering and Erosion

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Weathering and Erosion: 

Weathering and Erosion


Weathering The breakdown do the materials of Earth’s crust into smaller pieces.

Physical Weathering: 

Physical Weathering Process by which rocks are broken down into smaller pieces by external conditions. Types of Physical weathering Frost heaving and Frost wedging Plant roots Friction and impact Burrowing of animals Temperature changes

Frost Wedging: 

Frost Wedging

Frost Heaving: 

Frost Heaving

Plant Roots: 

Plant Roots

Friction and Repeated Impact: 

Friction and Repeated Impact

Burrowing of Animals: 

Burrowing of Animals

Temperature Changes: 

Temperature Changes

Chemical Weathering: 

Chemical Weathering The process that breaks down rock through chemical changes. The agents of chemical weathering Water Oxygen Carbon dioxide Living organisms Acid rain


Water Water weathers rock by dissolving it


Oxygen Iron combines with oxygen in the presence of water in a processes called oxidation The product of oxidation is rust

Carbon Dioxide: 

Carbon Dioxide CO2 dissolves in rain water and creates carbonic acid Carbonic acid easily weathers limestone and marble

Living Organisms: 

Living Organisms Lichens that grow on rocks produce weak acids that chemically weather rock

Acid Rain: 

Acid Rain Compounds from burning coal, oil and gas react chemically with water forming acids. Acid rain causes very rapid chemical weathering

Karst Topography: 

Karst Topography A type of landscape in rainy regions where there is limestone near the surface, characterized by caves, sinkholes, and disappearing streams. Created by chemical weathering of limestone

Features of Karst: Sinkholes: 

Features of Karst: Sinkholes

Features of Karst: Caves: 

Features of Karst: Caves

Features of Karst: Disappearing Streams: 

Features of Karst: Disappearing Streams


Erosion The process by which water, ice, wind or gravity moves fragments of rock and soil.

Water Erosion: 

Water Erosion Rivers, streams, and runoff

Ice Erosion: 

Ice Erosion Glaciers

Wind Erosion: 

Wind Erosion

Mass Movements: 

Mass Movements Landslides, mudslides, slump and creep landslide clip.mpeg

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