Across
- 3. a group of living organisms consisting of similar individuals capable of exchanging genes
- 7. age the approximate age of a specific rock layer
- 9. the third planet from the solar system
- 10. a period of one hundred years
- 11. a length or portion of time.
- 12. individuals that study and investigate the natural world
Down
- 1. the weather conditions prevailing in an area
- 2. a line that marks the limit of something
- 4. natural world around us
- 5. an expert in or student of geology
- 6. the available body of infomation that tends to prove or disprove something
- 8. time the extensive interval of time occupied by the geologic history of Earth