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WorksheetsNutrient Cycle Review
Total questions: 19
Worksheet time: 32mins
Name
Class
Date
1.
What is happening at 1?
a)
respiration: releasing CO2
b)
decomposing CO2 in the soil
c)
photosynthesis: absorbing CO2
d)
turning CO2 from the atmosphere into organic molecules
2.
Photosynthesis
a)
absorbs CO2
b)
releases CO2
3.
Animals obtain the nitrogen they need directly from the
a)
soil in their habitat
b)
air they breathe
c)
plants they eat
d)
bacteria living within them
4.
Bacteria that can use nitrogen in soil to make nitrogen compounds
a)
Eutrification
b)
Legumes
c)
Nitrogen Fixing
d)
decomposers
5.
What does the long grey arrow pointing to the atmosphere indicate?
a)
Photosynthesis
b)
Primary Production
c)
Respiration
d)
Assimilation
6.
What is a natural process which moves carbon?
a)
Photosynthesis
b)
Respiration
c)
Decomposition
d)
All of the above
7.
How nitrogen is "fixed" into useable form for plants...
a)
through action of bacteria only
b)
through lightning only
c)
through action of bacteria & lightning
d)
through photosynthesis
8.
During photosynthesis, carbon is moved from which reservoir to which reservoir?
a)
From the atmosphere to the terrestrial biosphere.
b)
From the troposphere to the terrestrial biosphere.
c)
From the lithosphere to the terrestrial biosphere.
d)
From the hydrosphere to the terrestrial biosphere
9.
The flow of carbon from the biosphere to the atmosphere would be slowed by reducing the
a)
amount of fertilizer applied to fields.
b)
number of size of forest fires
c)
buildup of carbonate rocks
d)
amount of rain water used for irrigation
10.
Organisms use nitrogen to form
a)
carbohydrates and lipids
b)
proteins and lipids
c)
lipids and nucleic acids
d)
proteins and nucleic acids
11.
What is one of the most important processes that removes carbon from the atmosphere?
a)
photosynthesis
b)
cellular respiration
c)
erosin
d)
soil respiration
12.
Which process moves carbon stored in fossil fuel into another carbon reservoir?
a)
When fossil fuels are burned, carbon enters the atmosphere as carbon dioxide.
b)
The denitrifying bacteria turns the fossil fuel into carbon dioxide gas.
c)
Decomposers convert the fossil fuels into greenhouse gases like carbon dioxide.
d)
The fossil fuels react with the soil to produce carbonates and carbon dioxide.
13.
Which of the following add carbon dioxide to the atmosphere?
a)
volcanoes
b)
combustion of fossil fuels
c)
animal and plant respiration
d)
all of these
14.
Nitrogen fixation processes nitrogen from which of the following sources?
a)
lightning
b)
fertilizers
c)
dead plants
d)
atmosphere
15.
What is the process of combining nitrogen gas with other elements to make nitrogen into usable compounds?
a)
nitrogen composition
b)
ammonia
c)
nitrogen fixation
d)
denitrification
16.
The global carbon cycle involves which factors?
a)
the flow of carbon matter and energy from one reservoir to another
b)
the natural processes of photosynthesis and respiration
c)
a holding place for carbon, including the ocean, terrestrial living organisms, soils, sediments and atmosphere
d)
all of the above
17.
How does the carbon in grass become part of a lion?
a)
The lion eats the grass
b)
Carbon from grass doesn't end up in a lion.
c)
The carbon ends up in the food the lion eats.
d)
The lion breathes in carbon given out by the plant
18.
How do plants get the nitrogen they need?
a)
from the air
b)
from the soil or water in which they live
c)
from the Sun
d)
from broken-down rocks
19.
A particular golf course is using large amounts of nitrogen fertilizer. What process could move this nitrogen into a local stream?
a)
volatilization
b)
nitrogen fixation
c)
runoff
d)
ammonification
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