Natural Resources

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