weathering/fossil
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Weathering | breakdown of rocks
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mechincal | physically breaking rocks
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ice wedging | water freezes and cracks rocks
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pressure release | exfoliation; rocks come off in layers
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plant roots | plant roots crack rocks
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abrasion | rocks wear down from water and waves
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chemical | rocks breakdown chemically
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acid rain | causes weathering by dissolving minerals in rocks
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rust | iron minerals in the rocks mix with water and oxygen to form rust
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three factors | surface area, rock composition, climate
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erosion | weathered rock particles are moved
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fossils | traces, remains, or evidence of living things
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sedimentary rocks | where most fossils are found
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mold fossil | a layer of sediment covers the organism
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cast fossil | when a mold is filled in
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trace | footprints, burrows, feces
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amber | fossilized tree sap
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scientists | can make predictions about the ecosystem based on fossils
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