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Agents of Weathering

QuestionAnswer
Frost wedging Occurs when water that is in a crack freezes and expands and causes parts of the rock to brake off.
Exfoliation Occurs when parts of the top layer of a rock become loose and comes off because of pressure and temperature changes.
Crystal Growth Occurs when salt grains grow in between other minerals so that they are pushed away from each other.
Tree Roots Tree roots that are wedged in rocks can grow and break that rock apart.
Oxidation Known as rusting and occurs when rocks and minerals are exposed to oxygen causing it to crumble. This change can be faster in places with high moisture and temperature.
Living Organisms Lichen attach themselves to rocks and release an acid that dissolves the rock. The minerals that are broken down off of the rock are used as food by the lichen.
Water Weathers the rock by dissolving it, when it mixes with the water is creates a solution.
Carbon Dioxide CO2 can dissolve the rainwater creating an acid called carbonic acid that weathers the rocks as it comes down.
Created by: mc1023
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