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Biogeochemical Cycles

Total questions: 34

Worksheet time: 2hrs 38mins

Name
Class
Date
1.
Where are nitrogen-fixing bacteria found?
a)
In the soil
b)
Root nodules
c)
In dead things
d)
In the atmosphere
2.
What is the only process that removes carbon from the atmosphere?
a)
combustion
b)
cellular respiration
c)
photosynthesis
d)
decomposition
3.
Where is carbon stored in the environment?
a)
Fossil fuels
b)
Wood of trees
c)
Calcium carbonate (shells and bones)
d)
All of the above
4.
What is this a picture of?
a)
Nitrogen cycle
b)
carbon cycle
c)
water cycle
d)
plant cycle
5.
Which process takes Carbon Dioxide from the air and converts it into a form of carbon used by living things?
a)
Precipitation
b)
Photosynthesis
c)
Respiration
d)
Bioremdiation
6.
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
7.
When nitrogen gas is turned in to a form that plants and animals can use is called 
a)
Combustion
b)
Photosynthesis
c)
Decomposition
d)
Nitrogen Fixation
8.
Carbon dioxide is added to the atmosphere by
a)
Burning fossil fuels 
b)
Cellular respiration
c)
Decomposing organic matter
d)
All answers are correct
9.

During photosynthesis, carbon is moved from _____________ to _____________?

a)

From the atmosphere to the biosphere.

b)

From the soil to the biosphere.

c)

From the ocean to the biosphere

10.

What process do the oxygen and carbon cycle directly rely on?

a)

photosynthesis

b)

precipitation

c)

nitrogen fixation

d)

transpiration

11.

What cycle are fossil fuels part of ?

a)

carbon

b)

oxygen

c)

nitrogen

d)

phosphorus

12.

Which cycle does not have a gas phase?

a)

carbon

b)

nitrogen

c)

phosphorus

d)

water

13.

Which process is part of the carbon cycle?

a)

transpiration

b)

nitrification

c)

combustion

d)

sedimentation

14.

Where is the largest reservoir for the phosphorus cycle?

a)

rocks and minerals

b)

the ocean

c)

the atmopshere

d)

fossil fuels

15.

What is the largest reservoir for water?

a)

the ocean

b)

rocks and minerals

c)

the atmosphere

d)

glaciers

16.

What is the largest reservoir for nitrogen?

a)

the ocean

b)

rocks and minerals

c)

the atmosphere

d)

bacteria

17.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle.
18.
How do animals get nitrogen?
a)
the atmosphere 
b)
eating other organisms
c)
rainwater
d)
lightning 
19.
How does carbon in a grass plant get into 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
20.
Why do organisms need nitrogen?
a)
to allow us to use oxygen
b)

to build muscle tissue

c)
to protect the blood supply
d)

to create body fat

21.

What cycle is this?

a)

Carbon Cycle

b)

Nitrogen Cycle

c)

Water Cycle

d)

Photosynthesis

22.

What happens to rate of photosynthesis at NIGHT?

a)

it stays constant

b)

it decreases

c)

it increases

23.

Cycles of matter only happen on land and not under water.

a)

True

b)

False

24.
Biologists describe nutrients as moving through cycles because the substances
a)
start as simple organic forms that plants need. 
b)
provide “building blocks” and energy that organisms need.         
c)
are passed between organisms and the environment and then back to organisms.       
d)
are needed by organisms to carry out life processes.
25.
Which of the following best explains why matter must travel through cycles?
a)
There is an unlimited amount of matter in the universe, so it can take on any form at any time
b)
There is a fixed amount of matter in the universe, so it must take on different forms at different times
26.
Rain, sleet, snow, and hail are all forms of _____.
a)
Percolation
b)
Evaporation
c)
Condensation
d)
Precipitation
27.
Ultimately, what drives the water cycle process?
a)
Solar (sun) energy
b)
Chemical energy
c)
Heat from the Earth's core
d)
Cold fronts and warm fronts
28.
Which of the following best explains why nitrogen fixation must take place?
a)
Atmospheric nitrogen is unusable to plants and animals
b)
Nitrogen must be returned to the atmosphere
c)
Animals must breathe in nitrogen
d)
Nitrogen gets "stuck" in the soil and must be untrapped
29.
Many nitrogen fixing bacteria are found in the roots of plants.  The plants receive fixed nitrogen and the bacteria receive nutrients from the plant.  This is an example of which type of symbiotic relationship?
a)
Competition
b)
Mutualism
c)
Parasitism
d)
Commensalism
30.
What is the overall purpose of cellular respiration?
a)
To use energy from the sun to produce food for the plant
b)
To use energy from the sun to produce oxygen for animals to breathe
c)
To break down food in order to produce energy (ATP)
d)
To break down food in order to produce carbon dioxide
31.
How have humans affected the phosphorus cycle?
a)
By burning too many fossil fuels
b)
By cutting down too many trees
c)
By using fertilizers on plants
d)
By eliminating decomposers
32.
What role do animals play in the carbon cycle?
a)
absorb carbon dioxide from the atmosphere
b)
give off carbon dioxide through respiration
c)
combustion
d)
decomposing matter
33.

Too much of a good thing, such as _____________ and _________________nutrients in the lakes and ponds can cause an imbalance resulting in eutrophication

a)

oxygen

b)

phosphorus

c)

xenon

d)

nitrogen

34.

Which is the correct order of changes that occur during eutrophication?

a)

Algal blooms blocks light from entering lower levels of a pond or lake.

b)

Aquatic plants cannot photosynthesize and die.

c)

The algae die.

d)

The bacteria decompose the algae, and they use up a lot of oxygen during this process.

e)

The fish and other aerobic organisms die.

1)
2)
3)
4)
5)

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