Mechanical Weathering
Abrasion
Rocks rubbing against each other
Acid Rain
rain mixed with pollution that dissolves rocks
Humus
Decayed organic material found in soil important to fertility
the main force behind erosions such as rockslide
Gravity
What is the difference between erosion and weathering?
weathering is the break down of rock while weathering is the movement of weathered material
Exfoliation
Layers of rock peel away due to pressure release
carbonic acid
formed when carbon dioxide and water can dissolve rocks like limestone
Soil Horizons
O Horizons
A Horizons
B Horizons
C Horizons
R Horizons
a powerful force that moves sediment snd shapes landscapes
water
What is a rockslide and what causes it
a rockslide is caused by gravity pulling rocks down a slope
Frost Heaving
Water freezes and expands pushing rock upwards
lichens
produce acids that chemically break down rock surfaces
Bedrock
The layer of rock beneath the soil
can pick up and carry small particles causing deflation
wind
what happens when acid rain reacts with a rock
the acid in the rain chemically wetaher the rock breaking it down
Pressure Release
As overlying materials are removed rock expands and cracks
oxidation
rock reacts with oxygen forming rust on iron containing rocks
loam
a fertile soil containing sand silt and clay equally
erode land as they move carrying rocks and soil
glaciers
mechanical weathering
the physical breakdown of rocks
chemical weathering
breaking down rocks through chemical changes
Erosion
the process of moving weathered material fromone location to another
Deposition
the dropping and settling of sediment in a new location