The Carbon Cycle - Worksheet | Printable and Distance Learning ... - Free Printable
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Step-by-step solution for: The Carbon Cycle - Worksheet | Printable and Distance Learning ...
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Show Answer Key & Explanations
Step-by-step solution for: The Carbon Cycle - Worksheet | Printable and Distance Learning ...
Let's go through each question and explain the solutions step by step.
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The diagram already has most labels, but let’s clarify what each part represents in the carbon cycle:
1. Sun → Photosynthesis:
- The sun provides energy for photosynthesis, where plants absorb CO₂ from the atmosphere to produce glucose and oxygen.
2. Photosynthesis → Plant Respiration:
- Plants use respiration (like animals) to release energy from glucose, producing CO₂ as a waste product.
3. Plant Respiration → Atmosphere (CO₂):
- CO₂ is released back into the air.
4. Animals (cow and sheep) → Animal Respiration → CO₂:
- Animals respire, releasing CO₂ into the atmosphere.
5. Dead organisms and waste products → Decay organisms → Fossil fuels:
- When organisms die, decomposers (like bacteria and fungi) break them down, releasing CO₂ through decomposition.
- Over millions of years, some dead organisms become fossil fuels.
6. Fossil fuels → Auto and factory emissions → CO₂:
- Burning fossil fuels (in cars, factories, power plants) releases stored carbon as CO₂ into the atmosphere.
7. Auto and factory emissions → CO₂:
- This shows human-caused combustion releasing carbon dioxide.
8. CO₂ in atmosphere → Plants via photosynthesis:
- Carbon dioxide is taken up again by plants during photosynthesis.
✔ So, the diagram correctly shows:
- Photosynthesis (plants absorbing CO₂)
- Respiration (by plants and animals)
- Decomposition (of dead matter)
- Combustion (from fossil fuels and vehicles)
- Carbon storage in fossil fuels
✔️ The diagram is already labeled correctly. No additional labeling is needed unless you're asked to fill in missing arrows or terms — but based on your image, it appears complete.
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Answer: b) respiration
Explanation:
Humans produce carbon dioxide as a waste product during cellular respiration. In this process, glucose is broken down in the presence of oxygen to produce energy (ATP), water, and carbon dioxide.
> Equation:
> C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy
So, respiration is the correct answer.
- a) Combustion – Not in the human body; this refers to burning fuels.
- c) Photosynthesis – Only done by plants; humans don’t do this.
- d) Decomposition – Occurs after death, not in living humans.
✔ Correct answer: b) respiration
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Answer: d) decomposition
Explanation:
After organisms die, their bodies are broken down by decomposers (bacteria, fungi, etc.). These decomposers carry out decomposition, which releases carbon dioxide into the atmosphere as they respire while breaking down organic matter.
- a) Combustion – This applies to burning fossil fuels or wood, not natural breakdown of dead tissue.
- b) Respiration – While decomposers *do* respire, the overall process of breaking down dead tissue is called decomposition.
- c) Photosynthesis – This removes CO₂, not releases it.
So, even though decomposition involves respiration by microbes, the broader term used here is decomposition.
✔ Correct answer: d) decomposition
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- Q.3: Diagram is already correctly labeled.
- Q.4: b) respiration
- Q.5: d) decomposition
Let me know if you'd like a simplified version of the carbon cycle or help drawing it!
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Q.3: Label the diagram below which shows the carbon cycle.
The diagram already has most labels, but let’s clarify what each part represents in the carbon cycle:
1. Sun → Photosynthesis:
- The sun provides energy for photosynthesis, where plants absorb CO₂ from the atmosphere to produce glucose and oxygen.
2. Photosynthesis → Plant Respiration:
- Plants use respiration (like animals) to release energy from glucose, producing CO₂ as a waste product.
3. Plant Respiration → Atmosphere (CO₂):
- CO₂ is released back into the air.
4. Animals (cow and sheep) → Animal Respiration → CO₂:
- Animals respire, releasing CO₂ into the atmosphere.
5. Dead organisms and waste products → Decay organisms → Fossil fuels:
- When organisms die, decomposers (like bacteria and fungi) break them down, releasing CO₂ through decomposition.
- Over millions of years, some dead organisms become fossil fuels.
6. Fossil fuels → Auto and factory emissions → CO₂:
- Burning fossil fuels (in cars, factories, power plants) releases stored carbon as CO₂ into the atmosphere.
7. Auto and factory emissions → CO₂:
- This shows human-caused combustion releasing carbon dioxide.
8. CO₂ in atmosphere → Plants via photosynthesis:
- Carbon dioxide is taken up again by plants during photosynthesis.
✔ So, the diagram correctly shows:
- Photosynthesis (plants absorbing CO₂)
- Respiration (by plants and animals)
- Decomposition (of dead matter)
- Combustion (from fossil fuels and vehicles)
- Carbon storage in fossil fuels
✔️ The diagram is already labeled correctly. No additional labeling is needed unless you're asked to fill in missing arrows or terms — but based on your image, it appears complete.
---
Q.4: Carbon dioxide is produced by the human body through _____________.
Answer: b) respiration
Explanation:
Humans produce carbon dioxide as a waste product during cellular respiration. In this process, glucose is broken down in the presence of oxygen to produce energy (ATP), water, and carbon dioxide.
> Equation:
> C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy
So, respiration is the correct answer.
- a) Combustion – Not in the human body; this refers to burning fuels.
- c) Photosynthesis – Only done by plants; humans don’t do this.
- d) Decomposition – Occurs after death, not in living humans.
✔ Correct answer: b) respiration
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Q.5: Carbon dioxide from living things is also returned to the atmosphere through processes of _________ of dead tissue.
Answer: d) decomposition
Explanation:
After organisms die, their bodies are broken down by decomposers (bacteria, fungi, etc.). These decomposers carry out decomposition, which releases carbon dioxide into the atmosphere as they respire while breaking down organic matter.
- a) Combustion – This applies to burning fossil fuels or wood, not natural breakdown of dead tissue.
- b) Respiration – While decomposers *do* respire, the overall process of breaking down dead tissue is called decomposition.
- c) Photosynthesis – This removes CO₂, not releases it.
So, even though decomposition involves respiration by microbes, the broader term used here is decomposition.
✔ Correct answer: d) decomposition
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✔ Final Answers:
- Q.3: Diagram is already correctly labeled.
- Q.4: b) respiration
- Q.5: d) decomposition
Let me know if you'd like a simplified version of the carbon cycle or help drawing it!
Parent Tip: Review the logic above to help your child master the concept of carbon cycle worksheet.
