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Weathering/fosils
Term | Definition |
---|---|
Weathering | Break down of rocks |
Mechanical | Physically breaking down rocks |
Ice wedging | Water freeze and cracks rocks |
Pressure release | Exfoliation come off in layers |
Plant roots | Plant roots crack rocks |
Abrasion | Rocks wear down from water and waves |
Chemical | Rocks brake down 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 | Trace, remains, or evidence, of living things |
Sedimentary rocks | Where most fossils are found |
Mold Fossils | A layer of sediment covers the organism, impression |
Cast fossils | Where a mold is filled in make a copy |
Trace | Footprints, burrows, feces, etc |
Amber | Fossilized tree sap |
Scientist | Can make a prediction about the ecosystem based on fossils |