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WorksheetsSect 2.26 and 2.27 Carbon/Nitrogen Cycles
Total questions: 25
Worksheet time: 16mins
Increased amounts of carbon dioxide and methane in the atmosphere cause which of the following to occur? (3)
solar energy to be reflected out into space
increasing global temperatures
solar energy to be trapped near the earth's surface
melting of the permafrost and glaciers
less fresh water due to the pollution trapped in glaciers
Which of the following are major reservoirs for carbon? (4)
ocean
atmosphere
igneous rock
biosphere
limestone
Which processes take carbon dioxide out of the atmosphere? (2)
photosynthesis
decomposition
diffusion
respiration
consumption
Which of the following statements are true? (3)
the geologic pathway for carbon is very slow
the organic pathway for carbon is fast
fossil fuels are part of the organic pathway
respiration and photosynthesis are directly related in the cycle
When an organism eats something containing carbon the process is called _____.
diffusion
respiration
decomposition
consumption
Which process can move carbon dioxide into and out of ocean water?
absorption
sedimentation
diffusion
respiration
When oil, gas, wood, or coal is burned, the process is called _____.
combustion
decomposition
the organic pathway
the geologic pathway
Which of these human activities has raised carbon dioxide and methane levels to their highest point ever in the atmosphere? (3)
breathing or respiration
global warming causing the polar ice, permafrost, and glaciers to melt
photosynthesis
burning fossil fuels
Which of these is the first step in the carbon cycle?
vulcanism releases lava as well as CO2 and methane gasses into the atmosphere
calcium carbonate forms in the ocean and sinks to the bottom forming sedimentary rock
CO2 diffuses into ocean water forming bicarbonate ions
limestone is broken up and goes deep into the mantle where it is made into magma
Which of these is the last step in the carbon cycle making it possible to start it over again?
carbon dioxide enters the autotrophs
heterotrophs die and decomposition occurs
heterotrophs eat the plants
heterotrophs do cellular respiration
Which of the following statements are true about biogeochemical cycles? (3)
bio is a reference to the earth
geo is a reference to the living things
chemical is a reference to the change that occurs
cycle is a reference to the repetitiveness of the events
examples include the water, carbon, nitrogen, and phosphorus cycles
Which of the following elements are most common in living things? (4)
oxygen
carbon
calcium
nitrogen
hydrogen
Which of these elements is most common molecule in the atmosphere?
carbon
oxygen
hydrogen
nitrogen
Legumes (plants with seeds in pods) have _____ in their root nodules. (2)
denitrifying bacteria
nitrifying bacteria
fungi
cyanobacteria
nitrogen fixing bacteria
Which of the following are a greenhouse gas responsible for raising global temperatures? (3)
methane
carbon dioxide
nitrogen
nitrous oxide
oxygen
In aquatic environments _____ fixate nitrogen or nitrates from nitrogen gas.
decomposers
cyanobacteria
nitrifying bacteria
denitrifying bacteria
_____ release nitrogen gas into the atmosphere by breaking down decaying material.
decomposers
soil bacteria
root nodules on legume plants
animals producing feces
_____ break down nitrates converting them back to nitrogen gas to be released back into the atmosphere. (2)
nitrifying bacteria
nitrogen fixing bacteria
fungi
denitrifying bacteria
_____ is the process of making nitrates and nitrites from nitrogen gas in the atmosphere. (2)
nitrification
denitrification
ammonification
nitrogen fixation
Which farming practice allows a farmer to have the plants make nitrate fertilizer so they don't have to buy and spray the fertilizer on their fields for next years crop?
crop rotation
contour farming
conservation tillage
crop dusting
What is the largest reservoir for nitrogen?
biosphere
geosphere
atmosphere
hydrosphere
Which of the following are fossil fuels? (3)
Wood
Solar
Natural gas
Oil
Coal
The overall increase in carbon dioxide and decrease in plants is contributing to _____. (3)
decreasing global temperatures
climate change
increased severity and frequency of storms
less water, carbon, nitrogen, and phosphorus being present on the planet
increasing global temperatures
Where does the carbon dioxide we exhale come from?
Carbon Dioxide is obtained from the food we eat.
Carbon Dioxide is a product of cellular respiration.
Carbon Dioxide is obtained from the atmosphere.
All of these are true.
Which equation correctly depicts cellular respiration?
carbon dioxide + water --> glucose and oxygen
oxygen + carbon dioxide --> glucose and water
glucose + carbon dioxide --> oxygen + water
glucose + oxygen --> carbon dioxide + water
