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WorksheetsCarbon Cycle
Total questions: 25
Worksheet time: 13mins
When humans burn fossil fuels, most of the carbon quickly enters the as carbon dioxide.
Water
Atmosphere
In the carbon cycle, producers take in the gas __
carbon dioxide
oxygen
Which of the following removes carbon from the atmosphere?
Combustion
Respiration
Photosynthesis
Organisms that do not decompose can be buried and become what?
water
nutrients
fossil fuels
Combustion is another word for __________.
Transportation
Respiration
Burning
What process occurs when coal (fossil fuel) is used for energy?
Decomposition
Combustion
Respiration is the process by which animals take in _____ and release _____.
photosynthesis, air
carbon, oxygen
oxygen, carbon dioxide
Plants use ____________________ to make their own food.
Carbon Dioxide
Oxygen
What are fossil fuels made from?
Plants and animals that are buried underground for millions of years.
They absorb it from the atmosphere.
How does the human body return carbon to the atmosphere in the carbon cycle?
Waste products
Photosynthesis
Cellular respiration
In the carbon cycle, animals can release carbon back into the cycle through __________ or through __________.
burning . . . photosynthesis
fixation . . . decomposition
respiration . . . decomposition
Which of the following are fossil fuels?
Coal, Water, Oil
Oxygen, Coal, Oil
Coal, Oil, Natural Gas
Weathering and dissolution are part of which carbon cycle?
Geological
Biological
Decomposition and Photosynthesis and part of which carbon cycle?
Geological
Biological
Subduction and Volcanic eruptions are part of which carbon cycle?
Geological
Biological
Which carbon cycle releases 1,000 times more carbon into the atmosphere?
Geological
Biological
When animals eat plants, the carbon that the plant contains is absorbed by the animals.
True
False
What is happening in step
1?
Animals are decomposing and realizing carbon into the soil.
Animals are releasing energy into the environment and storing carbon.
Animals are breaking down organic molecules and releasing carbon dioxide into the atmosphere.
What number represents combustion in this diagram?
3
2
What number would represent photosynthesis in this
diagram?
1
2
How does the concentration of carbon dioxide in the atmosphere affect climate?
As carbon dioxide concentrations increase, temperatures increase
As carbon dioxide concentration increase, temperatures decrease.
Burning fossil fuels releases carbon into the ________.
Water
Atmosphere
