Natural Resources
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
1.
Conversion of atmospheric nitrogen into inorganic form by living organisms or physical factors
3.
Conversion of ammonia by nitrifying bacteria into nitrites and nitrates
4.
Process of utilizing absorbed nitrogen for synthetic purposes
5.
Conversion of part of ammonia into nitrogen gas by certain bacteria which goes back into the atmosphere
Down:
2.
Conversion of part of ammonia into nitrogen gas by certain bacteria which goes back into the atmosphere
OK