WorksheetsCarbon & Phosphorus Cycle
Total questions: 25
Worksheet time: 14mins
Name
Class
Date
1.
Select the key processes involved in the carbon cycle
a)
neutralization, leaching and breathing.
b)
photosynthesis, respiration and combustion.
c)
volcanic eruptions, hydrogen burning, and death.
d)
protein production, and precipitation.
2.
What do plants do with the carbon they absorb?
a)
Make carbohydrates in the form of sugars.
b)
Use it in evapotranspiration.
c)
Make amino acids that become proteins.
d)
Make cell membranes.
3.
Efforts to reduce greenhouse gas emissions in the U.S. have resulted in the promotion of hybrid, electric or more fuel efficient cars. Which option best summarizes the reasons for this.
a)
Most of our electricity comes from fossil fuel driven power stations.
b)
The U.S. has relatively cheap electricity.
c)
“Green” sources of electricity are being incorporated into the electricity supply.
d)
Cars use fossil fuels and emit greenhouse gases.
4.
During cellular respiration, carbon dioxide is
a)
a reactant in the conversion of glucose to CO2
b)
released to the atmosphere from the conversion of glucose
c)
absorbed by plants.
d)
depleted from the carbon sink.
5.
The major reservoir or “sink” for carbon is
a)
CO2 in the atmosphere
b)
Granite bedrock
c)
The deep ocean sediment and limestone rock made of calcium carbonate.
d)
Aerobic and anaerobic bacteria.
6.
As nutrients cycle through an ecosystem, inorganic compounds are broken down and returned to autotrophs by
a)
primary producers.
b)
primary consumers.
c)
detritovores.
d)
the process of photosynthesis
7.
Which of the following statements is true of the phosphorus cycle?
a)
Phosphorus enters the atmosphere as phosphates.
b)
The phosphorus cycle utilizes the processes of erosion, and weathering.
c)
Phosphates are used in carbohydrate and glucose storage.
d)
The phosphorus cycle utilizes bacteria to breakdown phosphates and make them available for plants.
8.
Carbon is released back into the environment by all of the following EXCEPT
a)
burning fossil fuels
b)
respiration
c)
assimilation
d)
decay and decomposition
9.
In terms of availability, which of the following is the least available and is usually the most limiting factor for plants growth?
a)
Oxygen
b)
Carbon
c)
Nitrogen
d)
Phosphorus
10.
Phosphorous is needed in organisms for the production of
a)
ADP and ATP.
b)
Cellular membranes.
c)
Deoxyribonucleic and ribonucleic acids.
d)
All of the answers are correct
11.
In terms of geological time, most fossil fuels were deposited during the _______ period.
a)
Precambrian
b)
Jurassic
c)
Carboniferous
d)
Triassic
12.
Which of the following is known as the "sedimentary" cycle because its reservoir is sedimentary rock?
a)
Sulfur cycle
b)
Nitrogen cycle
c)
Phosphorus cycle
d)
Carbon cycle
13.
This process is responsible for most environmental problems of excess nitrogen and phosphorus entering streams, lakes and oceans.
a)
decomposition
b)
emissions from automobiles
c)
agriculture and house hold runoff
d)
photosynthesis
14.
The primary environmental abiotic carbon source for the carbon cycle is
a)
The carbon dioxide in the air.
b)
The carbon monoxide in the air.
c)
The carbon dioxide in the water.
d)
The carbon dioxide in plants.
15.
CaCO3 is the compound of carbon that:
I. Is condensed to form limestone.
II. Is found in shells and skeletons of marine animals.
III. Is used by plants as a major source of nutrition.
I. Is condensed to form limestone.
II. Is found in shells and skeletons of marine animals.
III. Is used by plants as a major source of nutrition.
a)
I. Only.
b)
II. Only.
c)
I. And II. Only
d)
I., II. And III.
16.
Human disruption often prevents phosphates absorbed by plants from returning to their original soil. Instead, these phosphates accumulate in
a)
sedimentary rocks
b)
nuclear waste
c)
uncultivated land.
d)
human sewage
17.
The amount of carbon in the atmosphere and participating in the carbon cycle is limited by carbon sinks, the largest of which is
a)
Dissolved CO2 in the ocean.
b)
Fossil fuel.
c)
Organic matter in soil.
d)
Long-lived trees.
18.
A large portion of the phosphorus used in fertilizer is derived from
a)
the guano of ocean-feeding birds
b)
the decomposition of detritus feeders.
c)
captured and dried mats of plankton from the Red Sea.
d)
algal chlorophyll.
19.
Carbon fixation by plants converts atmospheric carbon into
a)
CO
b)
CH4
c)
C6H12O6
d)
CaCO3
20.
Terrestrial producers ________ CO2 from the atmosphere,aquatic producers ________ CO2 from the water, and consumers_______ CO2 from the atmosphere.
a)
remove, remove, replenish
b)
replenish, remove, replenish
c)
remove, remove, remove
d)
remove, replenish, replenish
21.
In what way or ways is carbon in limestone released back to the atmosphere?
I. Plants leach out the carbon in limestone and consequently release CO2 after they decompose.
II. Geologic processes bring the sediments to the surface, where they react with O2 in the atmosphere.
III. Acid rain dissolves limestone.
I. Plants leach out the carbon in limestone and consequently release CO2 after they decompose.
II. Geologic processes bring the sediments to the surface, where they react with O2 in the atmosphere.
III. Acid rain dissolves limestone.
a)
I. Only.
b)
II. Only.
c)
III. Only
d)
II. And III. Only
22.
Which nutrient cycle does not have the troposphere in it's processes?
a)
Nitrogen
b)
Carbon
c)
Phosphorus
d)
Hyrdologic
23.
What type of technology would be used to look at algae blooms in the Gulf of Mexico?
a)
submersible (drone or submarine)
b)
SCUBA
c)
satellite imagery
d)
SONAR
24.
What is the basis of open ocean food webs that provides the majority of the Earth’s oxygen supply?
a)
ocean coral reefs
b)
abyssal upwellings
c)
phytoplankton
d)
mangrove wetlands
25.
Phosphorus deposited from guano close to the shore that has been dissolved in the ocean by runoff, and deposited in the ocean floor can be brought to the surface by what phenomena?
a)
phytoplankton
b)
zooplankton
c)
nutrient upwellings
d)
chemical sublimation
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