WorksheetsCarbon Cycle
Total questions: 26
Worksheet time: 21mins
Which gas do plants release, that humans depend on for survival?
Water
Carbon Dioxide
Oxygen
Sugar
Plants use ____________ to make their own food
Water
Sunlight
Carbon dioxide
All of these
Which statement is an example of how carbon moves through a food chain as part of the cycle?
Producers release carbon dioxide, and consumers take it it.
Producers take in carbon dioxide, and consumers release it.
Producers take in carbon from the soil, and they release it when they decompose.
Producers release carbon into the soil, and consumers take it in from the soil.
Which process(es) release carbon dioxide into the atmosphere?
respiration
combustion
photosynthesis
feeding
What type of organism receives carbon present in dead plants and animals?
producer
primary consumer
secondary consumer
decomposer
Which process removes carbon dioxide from the atmosphere?
deforestation
tree farms
burning fossil fuels
cellular respiration
When organisms die, what process returns their carbon back into the atmosphere?
Respiration
Decomposition
Combustion
Erosion
How does the human body return carbon to the atmosphere in the carbon cycle?
Waste products
Photosynthesis
Cellular respiration
Formation of glucose
Humans burn fossil fuels and wood, releasing carbon dioxide into the atmosphere. This carbon dioxide is then absorbed by trees for photosynthesis. These processes are contributory to which chemical cycle?
The carbon cycle
The water cycle
The nitrogen cycle
The phosphorous cycle
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 is an example of human impact on the carbon cycle?
The increased production of methane gases from cattle farms
The burning of fossil fuels
The cutting down of trees for lumber
Driving automobiles
All of the above
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
How do organisms (living things) move carbon through the carbon cycle?
Respiration only
Decomposition only
Photosynthesis, respiration, and decomposition
Decomposition and sedimentation
Respiration, decomposition, sedimentation, and photosynthesis
By what method is the majority of carbon moved from the lithosphere (upper part of Earth's crust) to the atmosphere?
Weathering
Deposition
The burning of fossil fuels
Respiration
What kind of organism takes out the most carbon from the atmosphere?
Plants
Bacteria
Animals
Humans
