Across
- 3. The theory that the same geologic processes of Earth will continue to work through Earth's history
- 5. The largest unit of geological time
- 6. How many Eons is Earth's history divided into
- 7. The principal stating all geological changes happen suddenly
Down
- 1. The thing that divides Earth's history by major events or changes to the Earth
- 2. Unpredictable events that cause a rapid change
- 4. The scientific study of the Earth, it's history, and how it was shaped
- 5. What do geologist study