Study Questions for Movie

"The Beach: a River of Sand"

• What are beaches made of?
• What is the source of beach material?
• Why is beach material all about the same size?
• How is the beach different in summer and winter? Why?
• What is wave refraction?
• How does sand travel along shore? Where does this happen?
• Where does longshore drift happen?

• What is a groin, and what is the effect of building one?
• What was the effect of the breakwater that was built to protect the anchorage?