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WorksheetsLG 10 Carbon Cycle
Total questions: 31
Worksheet time: 16mins
The process of respiration is essential in the oxygen/carbon dioxide cycle. Respiration removes ______ from the atmosphere and produces and releases ______ to the
atmosphere.
oxygen, carbon dioxide
carbon dioxide, oxygen
oxygen, glucose
glucose, oxygen
Theory states that the extraterrestrial forces that have influenced climate rhythms over the last two million years have occurred primarily because of cyclical changes in Earth’s orbit around the Sun. Identify which statement is true.
Every 100,000 years, the eccentricity of Earth’s orbit around the Sun oscillates between 5% and 15%.
Every 100,000 years, the eccentricity of Earth’s orbit around the Sun oscillates between 15% and 30%.
Every 100,000 years, the eccentricity of Earth’s orbit around the Sun oscillates between 0% and 5%.
Every 100,000 years, the eccentricity of Earth’s orbit around the Sun oscillates between 0% and 1%.
The process of photosynthesis is essential in the oxygen/carbon dioxide cycle. Photosynthesis removes ______ from the atmosphere and produces and releases ______
into the atmosphere.
oxygen, carbon dioxide
carbon dioxide, oxygen
oxygen, glucose
glucose, oxygen
Consider the following situations. Throughout the world, scientists have noted that glaciers are (1) melting, (2) calving, and (3) not reforming to any extent. Additionally, the polar ice caps are shrinking. What effect would these occurrences have on the human population?
The change in ice throughout the world would greatly impact the weather, possibly causing distress to the human population on Earth.
A decrease in polar ice would cause a decrease in ocean water temperature and that would impact the global climate.
The melting ice would cause a rise in sea level. That in turn, would cause coastal areas, some heavily populated to be flooded with sea water.
None, since the human population does not live in the areas mentioned: glaciers and polar ice caps.
CO2 is returned to the atmosphere by all methods EXCEPT
combustion
photosynthesis
decomposition
respiration
There are many positive feedback loops that accelerate global warming and cause climate change. For example, as polar ice melts due to global warming, there will be __________ sunlight reflected away and consequently, _______________________.
more, surface temperatures will decrease
more, surface temperatures will increase
less, surface temperatures will decrease
less, surface temperatures will increase
Carbon is a major component of all organic compounds, including carbohydrates, lipids, proteins, and nucleic acids. Carbon dioxide is continually exchanged between the atmosphere and oceans. What geological process returns carbon to the atmosphere in the form of carbon dioxide?
transpiration
respiration
decomposition of marine sediments
volcanic activity
Which of these would best help with global climate change?
find and use alternate sources of energy
stricter standards on water quality
increase the use of fossil fuels
decrease the average MPG of our cars
In the carbon cycle, carbon is transferred from animals to decomposers in all of the following ways EXCEPT
in dead carcasses.
as waste.
as carbon dioxide.
in scraps of discarded food.
Scientists previously referred to the long-ago deposited plant and animal remains, now buried, compacted, and transformed into coal and oil, as the dead-end of the carbon cycle. Since the Industrial Revolution, that would be an inaccurate statement. Why?
The carbon stored in the coal and oil combines with water in the atmosphere and falls back to Earth.
the carbon found in coal and oil is released back into the atmosphere as carbon dioxide.
Factories burning coal and oil deposit industrial wastes that add carbon back into the environment.
The combustion of coal and oil releases nitrogen by-products into the environment to be used again by man.
What two processes fuel the carbon cycle?
transpiration and transport
cellular respiration and transpiration
photosynthesis and transport
cellular respiration and photosynthesis
The burning of fossil fuels by cars and factories has most affected the ______________ cycle.
hydrogen
carbon
nitrogen
water
Burning of fossil fuels has changed the atmosphere by
producing a hole in the ozone.
increasing the concentration of ozone in the atmosphere.
increasing the concentration of carbon dioxide.
reducing the CFCs in the atmosphere.
Identify the type of relationship found in the graphs of Global Carbon Emissions and Global Temperatures over the past 150 years.
positive linear correlation
positive nonlinear correlation
negative linear correlation
negative nonlinear correlation
The diagram shown illustrates the _______ cycle.
nitrogen
water
phosphorus
carbon
Carbon dioxide diffuses into the ocean carbon cycle via the air-sea surface exchange. Scientists have noted that sea more CO2 diffuses and dissolves in colder sea surface water and less CO2 diffuses and dissolves in warmer water. Can you predict the outcome if average ocean temperatures increase as well? Include the effects on appropriate components of the biosphere as well as the hydrosphere.
Warmer oceans result in less dissolved CO2 in the oceans and more CO2 diffusing into the atmosphere. The extra CO2 would cause increased global warming, eventually causing a spike in temperatures around the Earth and massive extinctions.
Warmer oceans would mean less dissolved CO2 as well as other gases such as oxygen in the global ocean. Lower CO2 would result in a decrease in photosynthesis of autotrophs living in the oceans.
Warmer oceans would result in an increase in dissolved CO2. That in turn would result in a shift in the oceans to more photosynthesis, respiration, and decomposition.
Warmer oceans would result in an increase in dissolved gases in the oceans. An increase in the CO2 would result in an increase in the rate of photosynthesis of autotrophs found in the oceans.
Global warming is caused by an increase in the level of carbon dioxide gas in the atmosphere. How has this affected the world's oceans?
The oceans reflect a great deal of the carbon dioxide gas back into the atmosphere.
The oceans are absorbing the excess carbon, causing the oceans to become acidic.
There is an overgrowth of algae.
The oceans are warming as a result of the excess carbon dioxide.
The oceans of the world are considered to be carbon sinks. A carbon sink is anything that absorbs more carbon than it releases as carbon dioxide. Besides being dissolved in the
ocean waters, we can find carbon in many places throughout the oceans. Choice from the list and select all of the places in the ocean that you would find carbon.
A. In shells
B. Seafloor sediments
C. Fecal pellets and biological particles
D.Phytoplankton and other members of the food web
A
A,C and D
A and D
A through D
The oceans absorb carbon through three processes that draw atmospheric carbon dioxide into the oceans: the physical carbon pump, the biological carbon pump and the carbonate pump. In which scenario would a carbon sink be the result of the physical carbon pump mechanism?
More CO2 diffuses and dissolves in colder sea surface water and less CO2 diffuses and dissolves in warmer water.
More CO2 is diffusing into sea surface water than is diffusing from sea surface water out to the atmosphere.
More more CO2 is diffusing out to the atmosphere than is diffusing into sea surface water.
The movement of CO2 into and out of the ocean is fairly equal.
How would global warming change the water cycle and the climate around bodies of water, like oceans and lakes?
Warmer temperatures would cause more evaporation and much less ground water.
Warmer temperatures would cause more evaporation and more precipitation.
Warmer temperatures would cause more precipitation and less run-off.
Warmer temperatures would cause in a drier, hotter climate.
Excess carbon gases released into the atmosphere cause additional radiation to be retained and Earth's average temperature to increase. This phenomenon is known as
industrial air pollution.
the greenhouse effect.
the ozone shield.
solar radiation.
Many scientists are convinced that the growing human population is contributing to the gradual warming trend that is occuring on planet Earth. According to the researchers, which human activity is MOST likely to be a contributing factor in global warming?
Humans have created acid rain by releasing sulfuric acids into the air in the exhaust from factories and power plants.
Humans have changed the chemistry of the world's oceans by the use of phosphates and nitrogen-containing compounds.
Humans have released vast quantities of chemicals that have created excess ozone in the upper atmosphere.
Humans have added carbon dioxide to the atmosphere by burning fossil fuels.
Several atmospheric gases contribute to global warming: carbon dioxide, methane, and nitrous oxide. Considering this, which choice would do the LEAST to directly reduce atmospheric carbon dioxide. That is ____________
the conversion of restaurant grease to bio-diesel fuel for use by
motorists.
discontinued use of coal power plants, in favor of nuclear plants.
the widespread use of carpooling and public transportation.
the reforestation of large areas of Amazon wilderness in Brazil.
Studies of fossil and pollen distribution show that species are very sensitive to climate changes. When the climate changes, species often die out in their present areas and colonize new areas. Which of these environmental changes would most affect the arctic polar bears survival?
deforestation
an ice age
global warming
drought
Many scientists are convinced that the growing human population is contributing to the gradual warming trend that is occuring on planet Earth. According to the researchers, which human activity is MOST likely to be a contributing factor in global warming?
Humans have released vast quantities of chemicals that have created excess ozone in the upper atmosphere.
Humans have added carbon dioxide to the atmosphere by burning fossil fuels.
Humans have created acid rain by releasing sulfuric acids into the air in the exhaust from factories and power plants.
Humans have changed the chemistry of the world's oceans by the use of phosphates and nitrogen-containing compounds.
Scientists believe that during the Late Cretaceous period, many small seas dried up and new mountains began to rise. Which would MOST LIKELY cause them to believe the temperature decreased during this time?
The absence of fossils of many species of fish.
The absence of fossils of warm-weather plants.
The discovery of fossils of fish with small legs.
The discovery of fossils of warm-weather insects.
If Earth's atmosphere did NOT contain any water vapor, the temperature of the earth's surface would _____
be significantly hotter.
be significantly lower.
be unable to fluctuate.
be about the same.
Analyze the relationship between CO2 emissions and surface temperature change between 1950 and 2000 using the data presented in the graphs.
increase emissions leads to an increase of CO2 in the atmosphere which definitely causes the increase in temperature
increase emissions leads to an increase CO2 in atmosphere which may be the cause of the increase in temperature
increase emissions leads to an increase of CO2 in the atmosphere which may be the cause for the decrease in temperature
increase emissions leads to a decrease of CO2 in the atmosphere which may be the cause of the increase in temperature
Studies indicate that global warming has caused a shift in the migratory patterns of some bird species. Such changes in migration patterns may have adverse effects on some bird populations because
some species of birds have stopped migrating due to more suitable conditions at their place of origin.
the birds may arrive too early or too late to take advantage of the peak numbers of their insect preys.
bird species from the south have started flying north during winter, reversing the original trend.
scientists are no longer able to study the migratory habits of these birds.
It is projected that an increase in carbon dioxide levels in the atmosphere will MOST LIKELY lead to
lower-than-average hurricane rates.
lower-than-average ocean temperatures.
higher-than-average sea levels.
higher-than-average ice levels in arctic.
According to the theory of global warming, which statement is the MOST LIKELY reason for the current climate change?
The Sun is getting hotter.
The Sun is moving farther from Earth.
the atmosphere is reradiating more heat to Earth.
the atmosphere is reradiating more heat to space.
