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weathering\fossils

TermDefinition
Wethering Breakdown 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 chemicaly
Acid rain causes weathering by dissolving minerals into 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 fossils A layer of sediment covers the organism {impressions}
cast fossils when a mold is filled in [makes a copy]
trace foot prints, burrows, feces, etc.
amber fossilized tree sap
scientist can make predictions about the ecosystem based on fossils
Created by: s55617