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Chapter 7 fill in the blank


occurs when metal is exposed to rain; also known as rusting

chemical weathering

occurs when chemical reactions dissolve the minerals in rocks or change them into different minerals


the process by which water moves minerals down from one soil layer to another

mechanical weathering

water freezing and cracking rock and tree roots spreading through rock cause this


mixture of weathered rock, decayed organic matter, mineral fragments, water, and air

ice wedging

process of freezing and thawing cause this type of weathering


organic matter made of decayed plants and animals

soil profile

the layers of soil that you can see on a hill side when the soil and rock have been exposed

no-till farming

leaving plant stalks undisturbed in the field to cover the soil

shelter belts

rows of trees planted to reduce erosion of farm land

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