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Nitrogen Cycle Flashcards | StudBud
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Nitrogen Cycle
Nitrogen Cycle
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Earth science review of the nitrogen cycle.
Flashcards
20 cards
F
Practice quiz
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Host live
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Questions
20
Answers
1
Plants and animals have nitrogen in them. What process puts nitrogen back into the biosphere?
Bacteria
Precipitation
Condensation
Decomposition
2
Organisms that need nitrogen to survive
only bacteria
only plants
all living organisms
only animals
3
A golf course is using nitrogen fertilizer. What process could move this into a local stream?
Nitrogen fixation
Volatilization
Ammonification
Runoff
4
Animals obtain the nitrogen they need directly from the...
soil in their habitat
air they breathe
bacteria living within them
plants and animals they eat
5
The process in which nitrogen circulates and is recycled is called ____.
The Carbon Cycle
The Phosphorous Cycle
The Water Cycle
The Nitrogen Cycle
6
Nitrogen fixation takes nitrogen from which of the following sources?
Fertilizers
Lightning
Dead plants
The atmosphere
7
Plants and animals cannot use nitrogen directly from the air.
False
True
8
Organisms that break down dead plants and animals and release nitrogen back into the atmosphere
Animals
Plants
People
Bacteria
9
What is the process to make nitrogen into usable forms like nitrate?
Assimilation
Denitrification
Nitrification
Nitrogen composition
10
How do plants get the nitrogen they need?
From the soil or water in which they live
From the air
From broken-down rocks
From the sun
11
Nitrogen falls to the ground in what form?
Precipitation (rain, snow, sleet)
Lightning
Lemondrops and gumdrops
Sunshine
12
What can excess amounts of nitrogen cause in ecosystems?
Increases the number of animals within an ecosystem.
Leads to high oxygen content
Disrupts ecosystem, hurting species
Leads to improvement of the ecosystem
13
Usable nitrogen has decreased in the soil in a local park. What could explain this problem?
Increase fertilizer usage
Increase in biomass
Less lightning strikes
Decrease in bacteria in soil
14
What is the main difference between denitrification and the other steps of the nitrogen cycle?
Bacteria are not involved in denitrification
Denitrification isn't necessary to complete the cycle.
Denitrification takes days, the others are instant
Denitrification changes nitrogen into a gaseous form
15
How much of the atmosphere is composed of nitrogen gas?
78%
38%
21%
87%
16
Nitrogen-rich fertilizers and manure can cause water pollution.
False
True
17
How do our bodies absorb nitrogen?
By breathing
By listening to music.
By talking with friends
From the food we eat
18
Organisms require nitrogen to make which of the following?
Proteins and lipids
Glucose and starch
Proteins and nucleic acids
Carbs and nucleic acids
19
How is nitrogen "fixed" into usable form for plants?
Through the action of bacteria and lightning.
Through lightning only.
Through the action of bacteria only.
Through photosynthesis.
20
______ is the process where nitrogen is converted so the plants can have a usable form.
Nitrification
Fixation
Denitrification
Consumption
