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Weathering/fossils

TermDefinition
Weathering Breakdown of rocks
Mechanical Physical 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 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 Were most fossils are found
Mold Fossils 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
Scientists Can make predictions about the ecosystem based on fossils
Created by: s33730
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