Mechanical Weathering
Chemical Weathering
Soil Horizons
Agents of Erosion
Erosion
100
breaking down rocks into smaller pieces
What is mechanical weathering
100
metals rusting
What is oxication
100
where most plants germinate and grow
What is top soil
100
small particles which lie loosely on the weathered rock
What is sediment
100
the primary force that causes erosion
What is gravity
200
rocks rubbing against each other
What is abrasion
200
carbon dioxide dissolving in water
What is carbonic acid
200
leaf litter and humus compose this layer
What is O horizon
200
wind, water, and ice dropping sediment and rocks in a new location
What is deposition
200
the sediment that a stream carries
What is load
300
water freezing in a rock during the winter
What is frost wedging
300
contains sulfuric acid, carbonic acid, and other chemicals
What is acid rain
300
contains few nutrients from humus that has washed down from above
What is B horizon or subsoil
300
wind blowing picks up loose sediment and carries it away.
What is deflation
300
an area of sediment at the mouth of a river
What is a delta
400
water freezing under a rock and pushing it upwards
What is frost heaving
400
these organisms secrete a mild acid that dissolves rocks
What are lichens
400
consists of larger weathered fragments of the bedrock
What is the C horizon
400
deposits of rock and soil that is left over from a melting glacier.
What is morraine
400
these create shoals and shallow places along the coast
What are sand bars
500
creates cracks and breaks in rocks which leads to exfoliation
What is pressure release
500
these produce sulfur dioxide which combines with water in the atmosphere
What are fossil fuels
500
underneath all horizons
What is bedrock
500
forms a U shaped valley
What is a glacier
500
Stream, wave, and wind
What are 3 main types of erosion?
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