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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 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.
- 4. Multiple Choice_____ is the conversion of organic nitrogen into ammoniaNitrogen FixationAmmonificationDenitrificationAssimilation
- 5. Multiple Choice
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
- 6. Multiple Choice
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
- 7. Multiple Choice
According to this diagram, plants use nitrogen to make _________________________
bacteria
animals
proteins
decomposers
- 8. Multiple Choice
A correct path that nitrogen could take would be
air -> animals -> plants -> bacteria
animals -> air -> bacteria -> plants
bacteria -> air -> plants -> animals
air -> bacteria -> plants -> animals
- 9. Multiple Choice
The biological transformation of ammonia or ammonium to nitrites and nitrates.
ammonification
denitrification
nitrification
nitrogen fixation
- 10. Multiple Choice
Which process makes nitrites from ammonia?
ammonification
denitrification
nitrification
nitrogen fixation
- 11. Multiple Choice
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
- 12. Multiple Choice
How is nitrogen "fixed" into a usable form for plants?
Through action of bacteria only
Through lightning only
Through action of bacteria and lightning
Through photosynthesis
- 13. Multiple Choice
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
nitrogen composition
nitrogen fixation
ammonia
denitrification
- 14. Multiple Choice
What is the formula for atmospheric nitrogen?
N
N2
NH3
NO3
- 15. Multiple Choice
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
- 16. Multiple Choice
Plants and animals cannot use nitrogen directly from the air.
True
False
- 17. Match
Match the following steps of the nitrogen cycle to how they move bacteria.
Nitrogen Fixation
Atmosphere to Geosphere
Ammonification
Geosphere to Biosphere
Assimilation
Biosphere to Geosphere
Denitrification
Geosphere to Atmosphere
- Answer choicesTagsAnswer choicesTags