Classify each process as weathering or erosion.

1. The Colorado River carves land in Arizona to form the Grand Canyon.
2. A marble statue near the science museum is changing color due to rainfall.
3. The sand dunes in the Sahara Desert are changing shape.
4. Cracks form in a sandstone wall surrounding a house.
5. After a rainstorm, soil and rock pieces litter the roadways.

Weathering:
- A marble statue near the science museum is changing color due to rainfall.
- Cracks form in a sandstone wall surrounding a house.

Erosion:
- The Colorado River carves land in Arizona to form the Grand Canyon.
- The sand dunes in the Sahara Desert are changing shape.
- After a rainstorm, soil and rock pieces litter the roadways.

Weathering is the process by which rock materials are broken down into smaller pieces and/or chemically changed, while erosion involves the transportation of these smaller pieces elsewhere. The Colorado River carving the Grand Canyon is an example of erosion, as it transports the rock sediments. The changing color of a marble statue due to rainfall is an example of weathering, as the statue is being chemically altered by the rainwater.

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