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Geology III

Horizontales
When carbon dioxide in the air or soil reacts with water to form carbonic acid which corrodes certain rocks
Hills of sand built by wind or water
When rocks are broken down into smaller pieces
When rocks are broken down through chemical reactions
Underground rocks emerge on the surface and are able to expand and break apart
When rocks come loose and bounce or slide down a hill or mountain
The removal of weathered material
Verticales
When plant roots produce organic acids that dissolve minerals in rocks
Heating and cooling causes expanding and contracting, which stresses the rock until it breaks
Triangular areas of nutrient-rich sediment deposited by rivers
When water in cracks of rocks freezes and expands, forcing the crack to widen
The combination of rocks weathered to small bits, organic matter, water, and air
When oxygen reacts with rocks and metals to break them down
Water and wind carry particles that hit rocks, slowly scraping away their surfaces
Debris deposited by glaciers