Once the rock has been weakened and broken up by weathering it is ready for erosion. Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity. ... Over time pieces of rock can split off a rock face and big boulders are broken into smaller rocks and gravel.
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Answer:
Once the rock has been weakened and broken up by weathering it is ready for erosion. Erosion happens when rocks and sediments are picked up and moved to another place by ice, water, wind or gravity. ... Over time pieces of rock can split off a rock face and big boulders are broken into smaller rocks and gravel.