1. Compare and contrast surface and subsurface water in terms of natural inputs, outputs, and storage.
2. Define Subterranean river and Ephemeral River. Describe thetypes of areas where each of these river types are found.
3. Define the term aquifer and explain the difference between a confined and an unconfined aquifer.
4. Explain how natural springs, hot springs, and geysers differ.
5. Why is saltwater intrusion a common problem in heavily populated coastal areas? What kinds of problems does it cause?
