1. Surface Water An Erosional-Depositional System

2. Running Water When running water is confined to a channel, it is called a stream Smaller streams called tributaries flow into larger ones until it forms a river system

3. V-Shaped Valleys The action of stream abrasion causes a v- shaped valley to be cut into the landscape

4. Watershed Areas The area drained by a stream is called a watershed area Another name for a watershed area is drainage basin

6. The high land that separates one watershed area from another is called a divide.

8. The source of a river is called its headwaters. This is where a river has it’s greatest potential energy The place where a river ends is called the mouth of the river. This is the base level.

9. Headwaters of the Mississippi River Ithasca State Park