1. A dam is built on a major river that flows into the ocean. The dam greatly reduces the flow of river water beyond it. Ten years after the dam is built, nearby beaches have noticeably less sand....

1. A dam is built on a major river that flows into the ocean. The dam greatly reduces the flow of river water beyond it. Ten years after the dam is built, nearby beaches have noticeably less sand. Develop a hypothesis to explain what is happening at the beach.

2. Should you build a cabin at the foot of a slope? What should you consider to determine whether the slope presents an erosion hazard?