What is the main difference between weathering and erosion?

What is the main difference between weathering and erosion?

• A. Weathering breaks down rocks at the surface; erosion moves the broken pieces to new locations.
• B. Erosion breaks down rocks at the surface; weathering moves the pieces to new locations.
• C. Weathering and erosion are the same process; both move rocks only.
• D. Erosion adds new rocks to the surface.

Answer: (A)

The main idea is that weathering and erosion are two different steps in how rocks change on Earth's surface. Weathering breaks rocks into smaller pieces in place, at the location where the rock sits. Erosion then moves those broken pieces to new places using wind, water, ice, or gravity. So weathering is about breaking down, erosion is about moving. For example, water can seep into cracks and freeze, causing the rock to crack and crumble over time (weathering). Those crumbled pieces can then be carried away by a river or wind (erosion). The other statements mix up these roles: breaking rocks happens through weathering, not erosion; the two processes are not the same and weathering does not move rocks; erosion moves rocks rather than adding new rocks to the surface.

The main idea is that weathering and erosion are two different steps in how rocks change on Earth's surface. Weathering breaks rocks into smaller pieces in place, at the location where the rock sits. Erosion then moves those broken pieces to new places using wind, water, ice, or gravity. So weathering is about breaking down, erosion is about moving.

For example, water can seep into cracks and freeze, causing the rock to crack and crumble over time (weathering). Those crumbled pieces can then be carried away by a river or wind (erosion).

The other statements mix up these roles: breaking rocks happens through weathering, not erosion; the two processes are not the same and weathering does not move rocks; erosion moves rocks rather than adding new rocks to the surface.