Natural resources

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Across
  1. 2. It has four types
  2. 4. Substances which causes pollution
  3. 7. A cycle with move meant of water
  4. 8. movement of nutrients biotic and abiotic
  5. 12. Breaking down of glucose to release energy
  6. 13. A gas that omits and obsorbs UV rays
  7. 15. when nitrogen is changed to it’s componds
  8. 16. used in industries to make fertilizers
  9. 20. a process used by plants for intake of food
Down
  1. 1. A cycle by which carbon is used and given
  2. 3. H2O
  3. 5. gas that is required by humans to survive
  4. 6. Process of rotting or decaying
  5. 9. gas that is required by plants to survive
  6. 10. it is when substances react to form heat
  7. 11. Present everywhere in the atmosphere
  8. 14. Powdered rocks
  9. 17. cycle Refers to movement of oxygen
  10. 18. It helps to change nitrogen
  11. 19. When the environment is damaged