WorksheetsCarbon Cycle Gizmo
Total questions: 15
Worksheet time: 15mins
How does increasing plant biomass (amount of plants) affect atmospheric CO2?
Decreases it
Increases it
It has no effect
How does increasing oceanic CO2 affect atmospheric CO2?
Decreases it
Increases it
It has no effect
what fossil fuel usage will result in no change in atmospheric CO2 each year?
9 GtC
4 GtC
5 GtC
69 GtC
Suppose the inputs and outputs to the atmospheric carbon reservoir each year were as shown below. How much carbon would the atmosphere contain in ten years?
780 GtC
790 GtC
810 GtC
820 GtC
What process does the purple arrow indicate?
Respiration
Photosynthesis
Combustion
Decomposition
Which of the following processes add methane (CH4) to the atmosphere?
Breakdown of plant and animal remains in the soil.
Leakage from natural gas pipelines.
Food digestion by land animals.
All of these
How does the carbon in grass become part of a lion?
The lion eats the grass
Carbon from grass doesn't end up in a lion.
The carbon ends up in the lion's food chain.
The lion breathes in carbon given out by the plant
If the plant population decreased, the amount of carbon dioxide in the atmosphere would _________.
Stay the same
Increase
Decrease
How does the human body return carbon to the atmosphere in the carbon cycle?
Waste products
Photosynthesis
Cellular respiration
Formation of glucose
In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.
burning . . . photosynthesis
fixation . . . decomposition
decomposition . . . photosynthesis
respiration . . . decomposition
respiration . . . photosynthesis
Which of the following processes is a major component of the carbon cycle that removes carbon dioxide from the atmosphere?
Photosynthesis
Respiration
Combustion
Decomposition
In the carbon cycle, what role do decomposers play?
They release oxygen into the atmosphere
They convert carbon dioxide into glucose
They break down dead organisms, releasing carbon dioxide
They absorb carbon dioxide for photosynthesis
What is the primary way that carbon is returned to the atmosphere from the ocean?
Evaporation
Photosynthesis
Respiration by marine organisms
Sedimentation
How does deforestation affect the carbon cycle?
Increases carbon storage in trees
Decreases carbon dioxide in the atmosphere
Increases carbon dioxide in the atmosphere
Has no effect on the carbon cycle
Which of the following best describes the role of fossil fuels in the carbon cycle?
They are a source of carbon storage
They absorb carbon dioxide from the atmosphere
They release carbon dioxide when burned
They have no impact on the carbon cycle
