Across
- 2. outermost solid shell of a rocky planet
- 3. process of gradual destruction
- 7. fertile land that occur in nature and can be used for economic gain.
- 8. the central region of the Earth
- 10. integrates physical,biological sciences to the study of the environment,
- 11. parts of earth that move and float, create earthquakes
- 14. everything that makes up the regions of matter
- 16. the variety of life in a habitat
- 17. envelope of gases surrounding the earth
- 18. the science or practice of farming
- 19. colorless unstable toxic gas with a bad odor
Down
- 1. trapping of sun's warmth
- 4. endurance of systems
- 5. impact of a person or animal in an environment
- 6. interactions among species in their environments
- 9. lies beneath the crust and above the central core
- 10. changing of liquid into a gas
- 12. when there is heat in the air this happens to a cold surface
- 13. the regions of the surface, atmosphere, and hydrosphere of the earth
- 15. contaminants in the natural environment