Across
- 2. most water on Earth is
- 3. all of the rocks and minerals on Earth are part of the
- 6. this can flow into waterways if too many people use it
- 7. this process involves evaporation, condensation, transpiration, and precipitation
- 9. most of the fresh water on Earth is
- 11. all of the living things on Earth's surface are called the
- 14. the air on Earth is called the
- 16. all of the water on Earth's surface is called the
- 17. the process in which plants form ammonia through nitrogen fixation
- 18. the process where plants absorb carbon dioxide from the atmosphere and use it to make their food
- 20. the process in which water in the Earth's atmosphere falls back down to Earth
Down
- 1. this is the process in which certain atoms travel from the atmosphere, to Earth, and then back to the atmosphere
- 4. when things rot and break down
- 5. this elements is necessary for plants and animals to make their proteins
- 8. when water on Earth's surface is moved to the atmosphere
- 10. an odorless gas that circulates through the atmosphere, hint; not nitrogen
- 12. this is the largest reservoir of carbon
- 13. when water changes from a gas to a liquid
- 15. the process by which plants and animals get rid of carbon dioxide
- 19. when the water inside and on a plant turns to water vapor because of the sun's heat