Question

1. match the examples with the forces causing change.

a copper roof oxidized from brown to blue - green
the great lakes created by glaciers
sediment building up in the mississippi river delta
the layers of the grand canyon

Explanation:

• Weathering: Oxidation is a form of chemical weathering. When copper oxidizes, it undergoes a chemical change (reaction with oxygen in the air), which is why the copper roof changes color from brown to blue - green.
• Erosion: Glaciers cause erosion. As glaciers move, they carve out the land. The Great Lakes were formed by the erosion caused by the movement and melting of large glaciers over time.
• Deposition: Sediment building up is an example of deposition. In a river delta like the Mississippi River delta, as the river slows down (especially when it meets a larger body of water like the ocean), it deposits the sediment (sand, silt, etc.) that it was carrying.
• Superposition: The principle of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the younger layers are on top. The layers of the Grand Canyon are formed by sedimentary processes, and their arrangement (with distinct layers) can be explained by the principle of superposition.

Answer:

• a copper roof oxidized from brown to blue - green: weathering
• the Great Lakes created by glaciers: erosion
• sediment building up in the Mississippi River delta: deposition
• the layers of the Grand Canyon: superposition