1. How do we determine when an era begins/ends?
2. Which is bigger an Eon or an Era?
3. In which Era do we live?
4. Which Era is known as "Old Life"? What types of animals dominated this Era?
- Force & Motion
- Natural Selection & Adapations
- History of the Earth
- Environmental Science
- Climate Change
- Watershed Ecology
- Weather & Climate
- Structure, Function & Info Processing
- Unity and Diversity
- Giants of Science Biographies
- Green Avengers
- Teacher Resources
- Engineering Design