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- 1. Multiple ChoiceWhat is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?nitrogen compositionammonianitrogen fixationdenitrification
- 2. Multiple Choice
How much of the atmosphere is composed of nitrogen gas?87%38%78%21% - 3. Multiple ChoiceOrganisms that break down dead plants & animals and release nitrogen back into atmosphere...bacteriaplantsanimalsproducers
- 4. Multiple ChoiceOrganisms that need nitrogen to surviveonly plantsonly animalsonly bacteriaall living organisms
- 5. Multiple ChoiceIf the atmosphere is 78% N2, why can't we just get our nitrogen by breathing?We have no mechanism to break the triple bond of nitrogen between the atoms.Our lungs would be damaged by the N2.We need Oxygen for cellular respiration.The legumes take it up first.
- 6. Multiple ChoicePlants and animals cannot use nitrogen directly from the air.TrueFalse
- 7. Multiple ChoiceAfter plants and animals contain nitrogen, what puts it back into atmosphere and soil?decompositionprecipitationcondensationbacteria
- 8. Multiple ChoiceBased on this diagram, which of the following can you infer is the chemical formula for gaseous nitrogen?NN2N3N4
- 9. Multiple ChoiceWhat happens when organisms die and decay?Their bodies are lifted upTheir nitrogen returns to the soilthey keep their nitrogenThey stay on earth forever
- 10. Multiple ChoiceThe process in which Nitrogen circulates and is recycled is called ____________The nitrogen cycleThe water cycleThe carbon cycleNitrogen Fixation
- 11. Multiple Choice_____ is the conversion of organic nitrogen into ammoniaNitrogen FixationAmmonificationDenitrificationAssimilation
- 12. Multiple ChoiceNitrification happens in the ______AirSoilGround WaterPlants
- Answer choicesTagsAnswer choicesTags