PRESENTATION OUTLINE
Example of Erosion By Gravity
Gravity pulls down material and causes it to fall
Erosion when vegetation is removed from a hillside
The vegetation keeps the soil together when removed the soil is able to fall
Minnehaha falls
This waterfall carries material down it River
Erosion by moving water
Water tears apart the rocks and carries the down a river and can carve a canyon
Erosion by wind
The wind carries certain rocks away and leaves others behind and you are left with arches
Erosion by glaciers
Glaciers grind down the rock and carry it away
Mechanical Weathering
Breaking down a material without changing its chemical composition
Example of mechanical weathering
Plants roots break into rocks and go deeper into the rock and break apart the rock
Another example of mechanical weathering
When pressure is released in some rocks they break apart
Chemical weathering
The process of rocks breaking down due to chemical reactions
EXAMPLE OF CHEMICAL WEATHERING
Cliffs of Lake Superior
This shows weathering because the waves hit against the rock and break it apart