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WorksheetsBiogeochemical Cycles
Total questions: 30
Worksheet time: 28mins
Name
Class
Date
1.
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)
Bioremediation
2.
Gases such as carbon dioxide, methane and water vapor trap heat in the Earth's atmosphere causing global warming
a)
Global warming gases
b)
Hot house gases
c)
Greenhouse gases
d)
Thermal pollution
3.
The elements carbon, oxygen, hydrogen and nitrogen combined make up about 96% of our bodies (carbon is about 18%). Carbon is necessary for life because it is a(n)
a)
uncommon element in all living things.
b)
element found only in the atmosphere.
c)
excellent bond former.
d)
is found mostly in dead things.
4.
Respiration is the process by which ____________ is consumed and _______________ is produced.
a)
carbon, oxygen
b)
oxygen, carbon dioxide
c)
H20, oxygen
d)
carbon, H2O
5.
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
6.
Growing legumes such as alfalfa, peas or soy beans increases the process of
a)
denitrification
b)
nitrogen fixation
c)
ammonification
d)
ammonium oxidation
7.
Which of the following describes the role of nitrogen-fixing bacteria in the nitrogen cycle? Nitrogen-fixing bacteria convert
a)
nitrates intro nitrogen gas
b)
ammonia into proteins
c)
nitrogen gas into ammonia
d)
proteins into nitrates
8.
Organisms use nitrogen to form
a)
carbohydrates and lipids
b)
proteins and lipids
c)
lipids and nucleic acids
d)
proteins and nucleic acids
9.
The nitrogen cycle is a biogeochemical cycle because it moves ?
a)
only between living things (biosphere)
b)
only in the soil (geosphere)
c)
between the 4 different spheres
d)
only in the air (atmosphere)
10.
This a picture of the
a)
nitrogen cycle
b)
carbon cycle
c)
water cycle
d)
plant cycle
11.
If the atmosphere is 78% N2, why can't we just get our nitrogen by breathing?
a)
We have no mechanism to break the triple bond of nitrogen between the atoms.
b)
Our lungs would be damaged by the N2.
c)
We need oxygen for cellular respiration.
d)
The legumes take it up first.
12.
Which of the following processes converts C6H12O6 (glucose) to an inorganic molecule CO2
a)
translation
b)
photosynthesis
c)
cellular respiration
d)
excretion
13.
During photosynthesis, carbon is moved from which reservoir (sink) to which reservoir (sink)?
a)
From the atmosphere to the biosphere.
b)
From the troposphere to the biosphere.
c)
From the lithosphere to the biosphere.
d)
From the hydrosphere to the biosphere
14.
Carbon dioxide is added to the atmosphere by
a)
Burning fossil fuels
b)
Cellular respiration
c)
Decomposing organic matter
d)
All answers are correct
15.
What happens when organisms die and decay?
a)
Their nitrogen moves to the air as nitrogen gas
b)
Their nitrogen returns to the soil as ammonium
c)
Their nitrogen becomes tapped in clay and is unusable
d)
They stay on earth forever
16.
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
17.
Which of the following is a consequence of excess carbon building up in Earth’s atmosphere?
a)
The amount of breathable oxygen available to living things decreases
b)
Global temperatures change, affecting normal weather patterns.
c)
The amount of solar energy reaching the earth’s surface decreases.
d)
Global air pressure increases making it more difficult for plants and animals to breathe.
18.
Where is most water found on Earth?
a)
glaciers
b)
lakes
c)
rivers
d)
oceans
19.
What cycles through the environment in the hydrologic cycle?
a)
Carbon
b)
Nitrogen
c)
Hydrogen and Oxygen
d)
Sunlight
20.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
This is not a correct diagram of any cycle.
21.
The energy that drives the water cycle comes from
a)
Solar Radiation
b)
Geothermal Heat
c)
Water Energy
d)
Advection
22.
When water leaves a plant through small openings called stomata
a)
Precipitation
b)
Condensation
c)
Transpiration
d)
Perspiration
23.
In the food web, which organisms release the carbon from dead things back into the environment?
a)
Producers
b)
Consumers
c)
Scavengers
d)
Decomposers
24.
Cycle that includes sea shell creatures and plankton as a major oceanic component
a)
water
b)
carbon
c)
nitrogen
d)
sulfur
25.
Main cycle involved in regulating the pH (acid/base balance) of the ocean
a)
carbon
b)
water
c)
nitrogen
d)
sulfur
26.
Cycle that produces coal & oil
a)
water
b)
carbon
c)
nitrogen
d)
phosphorus
27.
What percentage of Earth’s water is freshwater?
a)
75%
b)
3%
c)
1%
d)
97%
28.
What role do producers play in the carbon and oxygen cycles
a)
They cant do anything because its dangerous
b)
Take in carbon dioxide gas from the air during photosynthesis
29.
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
30.
What is this a picture of?
a)
Nitrogen cycle
b)
carbon cycle
c)
water cycle
d)
plant cycle
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