Across
- 5. The new geologic epoch
- 7. The longest measurement of time(500 million years)
- 8. A period of time lasting hundreds of millions of years
- 9. The variety of life in a certain area
- 10. A period of time lasting thousands of years
Down
- 1. A person who studies rocks
- 2. A large accumulation of snow or ice
- 3. The planet we live on
- 4. A repeating process
- 6. The average weather in a place over many years