Across
- 4. which nutrient/element do animals/humans produce as waste
- 6. humans are hurting the nutrient cycle and the earth by doing this
- 8. animals/humans put CO2 in the atmosphere through this process
- 10. evaporation of water off of a plant
- 11. controls gas exchange in plants
- 13. burning these type of fuels puts CO2 in the air
Down
- 1. which nutrient/element is crucial for animals/humans
- 2. these type of organisms convert nitrogen into a usable form for plants
- 3. these type of organisms REMOVE CO2 from the air and make O2
- 5. we need nitrogen to make this
- 7. decomposers put carbon into the soil by breaking down ____ organisms
- 9. plants absorb nitrogen through the ______
- 12. these type of organisms need to eat plants in order to get nitrogen