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12 terms

Weathering

<p>&lt;p&gt;&amp;lt;p&amp;gt;Your quiz is June 9th (A block) or June 13th (B, C, D, and I blocks)&amp;lt;/p&amp;gt;&lt;/p&gt;</p>
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Mechanical weathering - plants
plant roots can grow into small cracks and expand the gaps in the rock, breaking the rock apart.
Mechanical weathering - animals
animals such as earthworms, groundhogs and moles can move soil around changing the surface of rocks that is exposed.
Abrasion
the grinding and wearing away of rock surfaces through the mechanical action of other rocks or sand particles - SCRAPING
Mechanical weathering
the process of physically breaking down rock
Chemical weathering
the process by which rocks break down as a result of chemical reactions
Ice wedging
water enters cracks in rocks, freezes, expands, thaws and makes the crack larger.
Chemical weathering - acids in living things
acids in lichen can wear away the surface of rocks
Chemical weathering - oxidation
a chemical reaction in which elements like iron or copper combines with oxygen resulting in rust, etc.
Acids in groundwater
in some places water contains weak acids and can result in caverns
Acid precipitation
rain, sleet or snow that contains high concentrations of acids.
Differential weathering
the process by which softer, less weather resistant rocks wear away and leave harder, more weather resistant rocks behind
Factors that affect weathering
shape of rocks, type of rocks, climate, elevation