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14 Dec 2022

Question 9

A student observes a rock that has been split by the roots of a tree, scattering sediment at the base of the rock. The student argues that the rock has been eroded by the tree roots. Why is this statement incorrect?

A The sediment still has the same chemical composition as the rock, erosion happens only when agents such as acid or oxygen change the minerals that make up the rock

B The rock has been weathered by the tree roots; erosion happens only when wind, water, or another agent removes the sediments from the area.

C The rock has been broken down into sediments; erosion happens only when gravity pulls the sediments to the lowest possible part of the region.