Notes

weathering- wear away or change the appearance or texture of (something) by long exposure to the elements.
erosion- when wind water etc. wears away natural land.
Mechanical weathering- the process of breaking big rocks into little ones without changing it chemically.
ice weathering- water gets into cracks, freezes, and ice forces the cracks apart more and more.
weathering ways-
-animals
-plants
-ice
chemical weathering- when chemical reactions destroy bonds in rocks making them fall apart, forming smaller and smaller pieces.
oxidization- oxygen rusting a metal item or material.
rust= iron oxide
topography- surface features of land
More weathering ways-
-soil
-time
-climate
-topography
mass movements
-slump= when a mass of rock and sediment moves downhill. speed: medium
-creep= when sediment moves slowly downhill. speed: very slow
-flow= a mix of rock, water, and sediment. speed: medium
-slide= when a section of soil or rock suddenly falls down a slope. speed: fast
glacier erosion
-sliding along, pieces come out in chunks.
-when the glacier makes a shallow dent, water comes off with it.
glaciers can deposit sediment that gets stuck in it.
deflation-erosion of land by wind
abrasion- a form of erosion that causes pits in rock and land and produce polished surfaces.
runoff-water that flows over the Earth's surface
sheet flow-when water flows downhill in a thin sheet
rills- small channels built into the earth's surface
gullies-channels that are at least 0.5 m across.