Across
- 5. study of the tectonic plates
- 6. study of human past
- 9. study of the atmosphere
- 10. study of life
- 12. study of the environment
- 15. study of micro-organisms
- 17. study of matter and energy
- 18. study of the human body
Down
- 1. study of the nervous system
- 2. study of the history of life on earth
- 3. study of outer space
- 4. study of water
- 7. study of animals
- 8. study of the chemistry of life
- 11. study of the ocean
- 13. study of the earth
- 14. study of periodic elements
- 16. study of plants