Across
- 2. differences
- 8. how things change to better suit their lifestyle
- 9. Charles Darwin's ideas on how things die if their traits aren't good enough
- 10. calendar of event in earth history
Down
- 1. theory on how every change on earth came from a catastrophic event
- 3. theory on how the earth's crust changes
- 4. how things change to make new things
- 5. no longer around on earth
- 6. how all the countries were together years ago
- 7. the study of gained traits