Geography
Geography, 18.09.2019 21:50, justiceemani12

Which of the following is an example of biological weathering?
a. plant roots growing through rock
b. water freezing in the cracks of rocks
c. oxygen reacting with the minerals in rock
d. rocks breaking from thermal expansion
frost wedging weathers rock because
water expands when it freezes
oxygen expands when it is heated
water contracts when it freezes
plant roots create external pressure

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