Across
- 4. fluid state of matter
- 5. careful management and protection of natural resources
- 7. moving air
- 8. state of matter with no fixed shape
- 12. inhalation and exhalation
- 13. contamination of the environment
- 15. Pressure force exerted by the atmosphere
- 16. firm state of matter
- 17. gaseous envelope surrounding Earth
- 20. essential invisible substance we breathe
- 21. Dioxide greenhouse gas released during respiration
Down
- 1. turned into vapor
- 2. rain snow sleet or hail
- 3. process of vapor turning into liquid
- 6. where cloud and the sun are found
- 9. Cycle continuous movement of water on, above, and below the surface
- 10. sudden burst of wind
- 11. origin or starting point
- 12. inhale and exhale
- 14. liquid essential for life
- 18. life sustaining gas
- 19. flowing watercourse