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- 1. Multiple Choice
The conversion of atmospheric nitrogen into ammonia, a form of nitrogen plants can readily use, is called -
denitrification.
ammonification.
nitrogen fixation.
nitrification.
- 2. Multiple Choice
To obtain the nitrogen they need, animals depend on many different microscopic ____________________ to convert nitrogen at all stages of the nitrogen cycle.
protozoa
bacteria
worms
insects
- 3. Multiple Choice
The atmosphere is made up of mostly nitrogen. The percentage of nitrogen in the atmosphere is approximately _____.
60%
78%
83%
51%
- 4. Multiple Choice
Decomposers make ammonium in the soil during the process of -
nitridication.
nitrogen fixation.
denitrification.
ammonification.
- 5. Fill in the Blank
____________________ converts ammonia and ammonium into nitrite and nitrate.
- 6. Multiple Choice
Select all answers below that are stages of the nitrogen cycle.
Nitrogen fixation
Diffusion
Ammonification
Nitrification
- 7. Multiple Choice
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
- 8. Multiple Choice
How do animals get the nitrogen they need?
From the air they breathe
From the water they drink
From the food they eat
From the sun
- 9. Multiple Choice
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
- 10. 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
- 11. Multiple Choice
This can transform nitrogen in the atmosphere into a usable form of nitrogen
rain
ice
lightning
sun
- 12. Multiple Choice
Organisms require nitrogen to make which of the following?
glucose and starch
lipids and nucleic acids
proteins and nucleic acids
carbohydrates and proteins
- 13. Multiple Choice
When fertilizer runs off of fields into streams it causes algae blooms that eventually lead to dead zones or areas that lack oxygen. The nutrients that are found in fertilizer that cause this situation called eutrophication are
carbon and nitrogen
nitrogen and phosphorus
phosphorus and sulfur
carbon and phosphorus
- 14. Multiple Choice
Which of these nitrogen cycle processes converts atmospheric nitrogen to a soil form of nitrogen that is usable by plants?
nitrogen fixation
nitrification
denitrification
ammonification
assimilation
- 15. Multiple ChoiceOrganisms that need nitrogen to surviveonly plantsonly animalsonly bacteriaall living organisms
- 16. Multiple ChoicePlants and animals cannot use nitrogen directly from the air.TrueFalse
- 17. Multiple Choice
How can Nitrogen gas (N2) be fixed into a usable form for plants?
Through the action of bacteria only
Through lightning only
Through the action of bacteria and lightning
- 18. Multiple Choice
What is it called when plants soak up usable Nitrogen from the soil?
Assistance
Assuming
Assimilation
Aeration
- 19. Multiple Choice
The conversion of atmospheric nitrogen into ammonia, a form of nitrogen plants can readily use, is called -
denitrification.
ammonification.
nitrogen fixation.
nitrification.
- 20. Multiple Choice
Decomposers make ammonium in the soil during the process of -
nitridication.
nitrogen fixation.
denitrification.
ammonification.
- 21. Multiple Choice
Which Statement is supported by evidence in the model?
Materials are cycled through living organisms only
Materials are cycled through consumers only
Materials are cycled through living and non living components of the ecosystem
Materials are cycled through the physical factors of the environment through evaporation and condensation.
- 22. Multiple Choice
What does the letter A represent in the model?
Gas
Carbon Dioxide in the atmosphere
Clouds
Nitrogen in the atmosphere
- 23. Multiple Choice
True or False:
Bacteria release nitrogen from dead organisms into the soil
True
False
- 24. Multiple Choice
Which process makes nitrites from ammonia?
ammonification
denitrification
nitrification
nitrogen fixation
- 25. Multiple Choice
Conversion of ammonia to nitrites and nitrates
denitrification
nitrogen fixation
nitrification
decomposition
- 26. Multiple Choice
What is process A?
Nitrification
Nitrogen Fixation
Denitrification
Assimilation
- Answer choicesTagsAnswer choicesTags