Across
- 3. what plants and animals need nitrogen to make
- 4. what plant has roots with nitrogen fixing bacteria
- 8. the process of nitrogen moving through different spheres of Earth
- 9. the process that fixes nitrogen making possible for plants to absorb it
- 10. fixed Nitrogen is in this and farmers add it to their crops
- 11. the organisms get their nitrogen by eating
Down
- 1. a term used to describe nitrogen that is in the atmosphere
- 2. plants take in this type of nitrogen
- 4. fixes nitrogen in the atmosphere
- 5. the state nitrogen is in before it is fixed
- 6. this helps change nitrogen in the soil so that it may be used by plants
- 7. what gas is 78% of the atmosphere?