Nitrogen cycle

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Across
  1. 4. Conversion of nitrates or nitrites into nitrogen gas by bacteria.
  2. 5. Earth's surface layer supporting plant growth and nutrient cycling.
  3. 6. Fixation Conversion of atmospheric nitrogen into forms like ammonia, usable by plants.
  4. 9. Earth's gaseous envelope where nitrogen cycles.
  5. 11. Acids Building blocks of proteins containing nitrogen.
  6. 12. Earth's solid part containing nitrogen in rocks and soil.
Down
  1. 1. Organisms breaking down dead matter, releasing nutrients like nitrogen.
  2. 2. Electrical discharge converting atmospheric nitrogen into usable forms.
  3. 3. Conversion of organic nitrogen compounds into ammonia by decomposers.
  4. 7. Swellings on plant roots housing nitrogen-fixing bacteria.
  5. 8. Fixing Bacteria Bacteria that convert atmospheric nitrogen into usable forms for plants.
  6. 10. Nitrogen-containing compounds in soil and water, vital for plant nutrition.