Overarching Concept: Change

The Earth has changed over time.

Life on the Earth has changed and is changing.

Activity # 1

Describe the evidence you see around you that the Earth is changing. Consider the following in your answer:

1. What can you observe in your area that gives you information about geologic processes such as erosion, weathering, etc.?
2. What role have the Cumberland River and its tributaries like the Harpeth River played in shaping this area?
3. What does the limestone in the area tell you about the type of habitat that existed in Williamson County millions of years ago?

• USGS weathering page
• Examples of weathering
• This Dynamic Earth
• Tales Told by Volcanoes