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WorksheetsCarbon Cycle Review
Total questions: 10
Worksheet time: 5mins
Which of the following is NOT a type of large molecule in which carbon is found and is necessary for life?
Proteins (muscle, skin, etc.)
Carbohydrates (food, sugars)
Lipids (fats)
Metals (iron, copper)
Which molecule do plants capture from the atmosphere to make sugar during photosynthesis?
CO2
O2
H2O
N2
Which of the following is an example of a carbon-based material that is NOT cycled as quickly as CO2 in the atmosphere?
Coal
Oxygen
Water vapor
Nitrogen gas
What is released into the atmosphere as waste from one organism eating another for carbon?
CO2
O2
H2O
CH4
What process releases CO2 into the atmosphere from dead organisms?
Decomposition
Photosynthesis
Respiration
Evaporation
What role do living organisms like bacteria and fungi play in the carbon cycle?
They break down dead materials and return nutrients like carbon to the soil.
They convert carbon dioxide into oxygen.
They produce fossil fuels directly.
They remove carbon from the atmosphere through photosynthesis.
What is a negative human impact on the carbon cycle mentioned in the material?
Burning wood or fossil fuels, which releases large amounts of CO2 into the atmosphere.
Planting more trees to absorb CO2.
Using solar panels for energy.
Recycling plastic materials.
How do animals contribute to the carbon cycle?
They remove carbon from the atmosphere and convert it into simple sugars.
They break down dead materials in the soil.
They return carbon to the atmosphere through cellular respiration.
They convert fossil fuels into energy.
What happens to carbon when organisms die?
It is recycled in the soil by decomposers.
It disappears completely.
It turns into fossil fuels immediately.
It is converted into oxygen.
Which of the following is NOT a way humans negatively impact the carbon cycle?
Planting more trees.
Burning fossil fuels.
Burning wood.
Releasing large amounts of CO2 into the atmosphere.
