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weathering and erosi

rocks through erosion

QuestionAnswer
sedimentary formed from sediment with water
igneous formed from cooling magma
metamorphic changed by heat and preasure
mechanical weathering physical breaking down of rocks into smaller pieces by temperature, water, wind, plants, or animal life
frost wedging water freezes in rock cracks, expands, and breaks the rock
frost heaving water freezes under rocks, causing them to be pushed up out of the ground
pressure release ground shift causes rock pressure ro be reduced, resulting in expansion and breaks and cracks
exfoliation result of pressure release, with layers peeling off the rocks
abrasion rocks rub against each other and wind or water may cause this to accur
hoodoos unusual rock formations caused abrasion
plants sprouting seeds and roots cause cracks
animals burrowing, underground dens
catastrophies fires, floods, storms
chemical weathering rocks changed into different substances
Oxidatoin oxygen combines with iron, forming rust
carbonic acid carbon dioxide dissolved in water
acid rain sulfur dioxide combines with water to form sulfuric acid
lichens organisms that grow on rocks and secrete mild acids
caves formed by wind, crashing waves, running water, or acidic water
stalactites hang form cave ceilings
stalagmites grow up from the cave floor
columns formed when stalactites and stalagmites frow together
speleothems formations formed from dissolved calcite deposited out of water
spelunkers cave explorers
soil loose material on earth's surface made up of rocks and minerals, water, air, and humus
humus decayed material form dead plants and animals
sand largest soil particle; drains quickly
clay smallest soil particle; holds moisture
silt small soil particle that holds air and water
texture how much of each kind of particle is in the soil
loam fertile soil with each type of paricle
horizons various layers of soil
top soil high proportion of humus
subsoil few nutrients; mostly weathered minerals
bedrock unweathered parent material called R horizon
Created by: charliesalle
 

 



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