Phosphorus and Nitrogen Cycles Crossword

What percent of the atmosphere does Nitrogen make up?
What process involves splitting nitrogen apart into a form that plants can utilize?
What form of nitrogen is used by plants?
What is the only biological enzyme that can break Nitrogens triple bond?
What type of bacteria takes ammonia and can convert it into nitrates and nitrites?
What type of bacteria uses the enzyme nitrate reductase to metabolize nitrogen oxides and transform them back into nitrogen gas?
Unlike many elements contained in the air, where is phosphorus commonly found?
When water erodes phosphorus containing rocks, phosphates, are __________ into the water.
Are the dissolved phosphates in water able to be assimilated by plants?
How long can a single atom of phosphorus be caught in a biological cycle for?
What man made invention requires phosphorus and nitrogen as part of its ingredients?
Fertilizers can have a _______ impact on ecosystems when large amounts of nitrogen and phosphorus are introduced.