Across
- 5. The fourth most abundant element in the universe and essential to life on Earth
- 6. Process by which water changes from a liquid into a gas
- 7. Process by which droplets of water fall to Earth as rain, snow, sleet, or hail
- 12. The breaking down of materials by rotting, decay, or microorganisms
- 13. The most abundant element in the atmosphere, it is essential for life
- 14. Cycle Process in which water circulates between Earth’s oceans, atmosphere, and land
- 15. Carbon molecules bonded to hydrogen molecules
- 16. Precipitation not absorbed into soil that moved to water collection points
- 17. A system that changes atmospheric nitrogen into usable forms
- 19. Carbohydrates(glucose) are used to make ATP energy for metabolic reactions
- 20. Carbon dioxide, water, and sunlight yields glucose and oxygen
- 21. Nitrifying bacteria convert unusable forms of soil nitrogen into useable forms
Down
- 1. Microscopic marine plants that use carbon to make shells of calcium carbonate
- 2. Matter originating from a living organism; contains hydrocarbons
- 3. Process by which water vapor in the air is changed into liquid water
- 4. Cycle A system that transfers carbon from one part of the environment to another
- 8. The process of burning something
- 9. Turning atmospheric nitrogen into useable forms
- 10. Glucose and oxygen yield carbon dioxide, water, and ATP energy
- 11. A process by which green plants turn carbon dioxide into carbohydrates
- 18. The downward movement of water from land surfaces into soil or porous rock