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Science / Geology / Grade 5 / sg501

Separate Weathering, Erosion, and Deposition

Track whether material is breaking down, moving, or settling.

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Weathering breaks down or alters material in place. Erosion removes and transports it. Deposition occurs when transported sediment settles. These processes can happen in sequence, but they are not the same action.

Worked example

Water freezing in a crack can help break rock apart: weathering. A stream carrying the pieces is erosion and transport. Pieces settling in a calmer area are deposition.

1. A rock cracks apart where it lies. Which process is described?
2. A river carries sand downstream. Which process is represented?
3. Sand settles as moving water slows. Which process is described?
4. Which sequence is possible?
5. Why should a scientist distinguish these processes?