Carbon Cycle Worksheet with Diagram and Questions

Problem Description:

The task involves using the provided Carbon Cycle diagram to answer questions about how carbon is used in living systems and its storage. The goal is to understand the flow of carbon through various processes and identify key components of the carbon cycle.

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Solution:

#### Question 1: How is carbon used by living things?

- Explanation: Carbon is a fundamental element for all living organisms. It forms the backbone of organic molecules such as carbohydrates, proteins, lipids, and nucleic acids (DNA and RNA). Living things use carbon primarily through the process of photosynthesis and respiration.
- Photosynthesis: Plants and some microorganisms (e.g., algae) use sunlight to convert carbon dioxide (\( \text{CO}_2 \)) from the atmosphere into glucose, a form of energy-rich carbon compound. This process removes \( \text{CO}_2 \) from the atmosphere and stores it in plant tissues.
- Respiration: All living organisms, including plants, animals, and microorganisms, break down glucose to release energy. During respiration, carbon is released back into the atmosphere as \( \text{CO}_2 \).

- Answer: Carbon is used by living things to build their bodies (in the form of organic compounds like carbohydrates, proteins, and fats) and to produce energy through metabolic processes such as photosynthesis and respiration.

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#### Question 2: Name two stores of carbon compounds.

- Explanation: The carbon cycle involves various reservoirs or "stores" where carbon is stored in different forms. These stores include:
1. Atmosphere: Carbon is stored as carbon dioxide (\( \text{CO}_2 \)) in the air.
2. Biosphere (Living Organisms): Carbon is stored in the bodies of plants, animals, and microorganisms in the form of organic compounds.
3. Lithosphere (Earth's Crust): Carbon is stored in rocks and minerals, such as limestone and fossil fuels (coal, oil, and natural gas).
4. Hydrosphere (Oceans and Water Bodies): Carbon is dissolved in water as bicarbonate ions and is also stored in marine organisms.

- Answer: Two stores of carbon compounds are:
1. Atmosphere (as \( \text{CO}_2 \))
2. Biosphere (in living organisms)

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Final Answers:

1. How is carbon used by living things?
- Carbon is used by living things to build their bodies (organic compounds) and to produce energy through processes like photosynthesis and respiration.

2. Name two stores of carbon compounds.
- Atmosphere and Biosphere

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Boxed Final Answers:

1. Carbon is used by living things to build their bodies (organic compounds) and to produce energy through processes like photosynthesis and respiration.
2. Atmosphere, Biosphere

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\boxed{\text{1. Carbon is used by living things to build their bodies (organic compounds) and to produce energy through processes like photosynthesis and respiration.}}
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\boxed{\text{2. Atmosphere, Biosphere}}
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