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Weathering/fossils

TermDefinition
Weathering Break down of rocks
Mechanical Physically breaking rocks.
Ice Wedging Water freezes and cracks rocks
Pressure Release Exfoliation, rocks come off in layers
Plant Roots Plant roots crack rocks
Abrasion Rocks wear down from water and waves
Chemical Rocks breakdown chemically
Acid Rain Causes weathering by dissolving minerals in rocks
Rust Iron minerals in the rocks mix with water and oxygen to form rust.
Three Factors Surface area, rock composition, and climate
Erosion Weathered rock particles are moved
Fossils Traces, remains or evidence of living things
Sedimentary Rocks Where most fossils are found
Mold Fossil A layer of sediment covers the organism; impression
Cast Fossil When a mold is filled in; makes a copy
Trace Footprints, burrows, feces, etc.
Amber Fossilized tree sap
Scientist Can make predictions about the ecosystem.
Created by: s33450
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