Natural Resources
Across
- 3. The process by which plants obtain food
- 4. Conversion of nitrates into ammonia
- 6. Physical method of nitrogen fixation
- 7. Burning of fossil fuels
- 10. Sphere that contains biotic and abiotic components
- 11. A glass room aimed at increasing plant growth
- 16. Increase of algae in a water body
- 18. Inhalation and exhalation of air
- 20. Conversion of liquid to gas by heating
- 22. Outcome of condensation
- 25. Type of nitrogen fixing bacteria
Down
- 1. Rain,hail,snow and sleet are forms of ____
- 2. The most abundant gas
- 5. Blanket of air covering the Earth
- 8. Name of the gas above the stratosphere
- 9. Direction of wind during the night
- 12. The act of toxifying all resources
- 13. The gas we all need
- 14. The most important liquid
- 15. Heating up of the Earth
- 17. Breaking up of rocks form ____
- 19. Evaporation through plants
- 21. Planting of trees
- 23. Coal and petroleum are ____
- 24. Found in number in the soil