Organisms that do not decompose naturally can be buried and become what?
oxygen
nutrients
calcium carbonates
fossil fuels
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
If a forest fire occurs, what will happen to the carbon in the forest?
It will go into the soil
It will go into the atmosphere
It will runoff into nearby streams and rivers
It will be destroyed
Where does all the carbon in organisms (living things) originate from?
Earth's atmosphere
Rocks
Water
Soil
What kind of organism takes out the most carbon from the atmosphere?
Plants
Bacteria
Animals
Humans
Check all the ways that carbon dioxide is ADDED to the atmosphere.
Respiration
Combustion
Photosynthesis
Diffusion
Decomposition
Check all the ways that carbon dioxide is REMOVED from the atmosphere.
Respiration
Combustion
Photosynthesis
Diffusion
Decomposition
What are the two main reservoirs for carbon dioxide?
Ocean, fossil fuels
Ocean, atmosphere
Atmosphere, fossil fuels
Calcium Carbonate, ocean
Which of the following is a major carbon sink?
Ocean
Atmosphere
Calcium Carbonate
None of the above
Producers, like plants, do not cellular respiration.
True
False
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