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TermDefinition
weathering the process that breaks down rocks at the earths surface
erosion the movement of rock particles by forces
chemical weathering the rock is chemically broken down, the smaller pieces DO NOT have the same composition as the parent rock, rock form can change, water, oxygen (oxidation) living= organisms, carbon dioxide.
abrasion rubbing can wear away surfaces like sandpaper, caused by wind and water
ice wedging water makes its way into cracks in the rocks, freezes and expands causing pieces of the rock to break off.
mechanical weathering heating and cooling, freezing and thawing, plant growth, abrasion, animal actions. the rock is physically broken down, the smaller pieces have the same composition as the parent rock, acts very slowly, but very effective.
surface area the total measure of the exposed "outside" face of a solid object
ID and ex causes of mechanical weathering heat+cooling:outside flakes off in layers(like onion). Freezing+thawing:water expands,causes cracks in rock to get bigger,aka ice wedging.plant growth:roots crack rocks as they grow.abrasion:rubbing wears away surfaces like sandpaper,caused by wind&water.
ID and ex causes of chemical weathering part 1 water:dissolves minerals. oxygen (oxidation):combines with iron&makes rust (red/brown) living organisms: roots produce weak acid,dissolves rock ex:lichens.carbon dioxide:CO2 in the air dissolves in rainwater making a weak acid,dissolves marble&limestone.
ID and ex causes of chemical weathering part 2 acid rain: fossil fuel pollution combines with rain to make acid rain, very rapidly breaks down rocks.
Created by: user-1866071
 

 



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