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Weathering
Question | Answer |
---|---|
weathering | process that breaks down rock |
erosion | removal of rock particles by wind, water, ice or gravity |
mechanical weathering | rock is physically broken into smaller pieces |
abrasion | grinding away of rock |
ice-wedging | freezing and thawing of water in cracks of rock |
chemical weathering | break down rock through chemical changes |
plant growth | roots of plants force cracks in rock apart |
animal actions | animals burrow in ground and break rocks apart |
release of pressure | erosion moves material on surface of rock releasing pressure and cause rock to crack |
water | dissolves rocks |
oxidation | iron combines with oxygen in presence of water |
carbon dioxide | dissolves in water and seeps into soil forming an acid |
lichens | plant-like organisms that grow on rocks and produce acid |
acid rain | rain polluted with acids from the air |
permeable | material full of air spaces |