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- 1. Multiple Choice
What converts nitrogen gas into a usable form for plants and animals?
bacteria
rain
fungi
car exhaust
- 2. 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
- 3. Multiple Choice
What process occurs when dead plant and animal matter decomposes and nitrogen is released back into the atmosphere?
Assimilation
Fixation
Ammonification
Denitrification
- 4. 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
- 5. Multiple ChoiceHow much of the atmosphere is composed of nitrogen gas?87%38%78%21%
- 6. Multiple ChoiceOrganisms that break down dead plants & animals and release nitrogen back into atmosphere...bacteriaplantsanimalsproducers
- 7. Multiple Choice
This can transform nitrogen in the atmosphere into a usable form of nitrogen
rain
ice
lightning
sun
- 8. Multiple Choice
Burning fossil fuels releases this into the air
nitrous oxide
nitrate
nitrogen gas (N2)
methane
- 9. 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
- 10. 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
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