The Carbon Cycle worksheet - Free Printable
Educational worksheet: The Carbon Cycle worksheet. Download and print for classroom or home learning activities.
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Step-by-step solution for: The Carbon Cycle worksheet
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Show Answer Key & Explanations
Step-by-step solution for: The Carbon Cycle worksheet
Let's solve each part of the worksheet step by step based on the carbon cycle diagram and general knowledge of ecological processes.
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Answer:
Approximately 0.04% (or 400 parts per million, ppm) of the Earth's atmosphere is carbon dioxide.
> ✔ *Note: This value has increased over time due to human activities, but as of recent measurements, it's around 0.04%.*
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We analyze the arrows in the diagram:
- Q: Arrow from carbon compounds in animals → carbon dioxide in the air
➤ This is respiration — animals release CO₂ when they breathe out.
➤ Adds CO₂ to the atmosphere.
- R: Arrow from carbon compounds in green plants → carbon dioxide in the air
➤ This is respiration — plants also respire and release CO₂.
➤ Adds CO₂ to the atmosphere.
- S: Arrow from carbon dioxide in the air → carbon compounds in green plants
➤ This is photosynthesis — plants take in CO₂ to make glucose.
➤ Removes CO₂ from the atmosphere.
- T: Arrow from carbon compounds in animals → carbon dioxide in the air
➤ This is decomposition — dead organisms are broken down by decomposers, releasing CO₂.
➤ Adds CO₂ to the atmosphere.
> 🔍 *Note: Although "T" starts from animals, it goes through dead plants and animals, so it represents decomposition of organic matter.*
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#### ✔ Completed Table:
| Letter | Name of Process | Does it add or remove from the atmosphere? |
|--------|---------------------|---------------------------------------------|
| Q | Respiration | ADDS |
| R | Respiration | ADDS |
| S | Photosynthesis | REMOVES |
| T | Decomposition | ADDS |
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Process S is photosynthesis.
In photosynthesis, plants use CO₂ and water to produce glucose (a carbon-containing compound) and oxygen.
> ✔ Answer: Glucose (or carbon compounds like carbohydrates)
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Burning (combustion) of fossil fuels, wood, or other organic materials releases CO₂ into the atmosphere. This process is not shown in the diagram.
> ✔ Answer: Combustion
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a. 0.04%
b.
- Q: Respiration – ADDS
- R: Respiration – ADDS
- S: Photosynthesis – REMOVES
- T: Decomposition – ADDS
c. Glucose
d. Combustion
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a. What is the percentage of carbon dioxide in the atmosphere?
Answer:
Approximately 0.04% (or 400 parts per million, ppm) of the Earth's atmosphere is carbon dioxide.
> ✔ *Note: This value has increased over time due to human activities, but as of recent measurements, it's around 0.04%.*
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b. Complete the table below by filling in the name of the processes occurring at Q, R, S, and T. Then type ADDS or REMOVES to indicate whether or not the process adds or removes carbon dioxide from the atmosphere.
We analyze the arrows in the diagram:
- Q: Arrow from carbon compounds in animals → carbon dioxide in the air
➤ This is respiration — animals release CO₂ when they breathe out.
➤ Adds CO₂ to the atmosphere.
- R: Arrow from carbon compounds in green plants → carbon dioxide in the air
➤ This is respiration — plants also respire and release CO₂.
➤ Adds CO₂ to the atmosphere.
- S: Arrow from carbon dioxide in the air → carbon compounds in green plants
➤ This is photosynthesis — plants take in CO₂ to make glucose.
➤ Removes CO₂ from the atmosphere.
- T: Arrow from carbon compounds in animals → carbon dioxide in the air
➤ This is decomposition — dead organisms are broken down by decomposers, releasing CO₂.
➤ Adds CO₂ to the atmosphere.
> 🔍 *Note: Although "T" starts from animals, it goes through dead plants and animals, so it represents decomposition of organic matter.*
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#### ✔ Completed Table:
| Letter | Name of Process | Does it add or remove from the atmosphere? |
|--------|---------------------|---------------------------------------------|
| Q | Respiration | ADDS |
| R | Respiration | ADDS |
| S | Photosynthesis | REMOVES |
| T | Decomposition | ADDS |
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c. Name the carbon containing product produced by process S on the diagram.
Process S is photosynthesis.
In photosynthesis, plants use CO₂ and water to produce glucose (a carbon-containing compound) and oxygen.
> ✔ Answer: Glucose (or carbon compounds like carbohydrates)
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d. Name the process that involves burning and is missing from the diagram.
Burning (combustion) of fossil fuels, wood, or other organic materials releases CO₂ into the atmosphere. This process is not shown in the diagram.
> ✔ Answer: Combustion
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✔ Final Answers Summary:
a. 0.04%
b.
- Q: Respiration – ADDS
- R: Respiration – ADDS
- S: Photosynthesis – REMOVES
- T: Decomposition – ADDS
c. Glucose
d. Combustion
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Parent Tip: Review the logic above to help your child master the concept of carbon cycle worksheet high school.
