Questions and Answers
What is the exchange of carbon between the environment and living things?
carbon cycle
Name the 2 processes that drive the carbon cycle.
respiration and photosynthesis
Describe the role of photosynthesis in the carbon cycle.
Plants use CO2 from the air to make sugars; most living things get the carbon they need by eating plants.
Describe the role of respiration in the carbon cycle.
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Describe the role of decomposition in the carbon cycle.
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What do all organic matter have?
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Describe the role of combustion in the carbon cycle.
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What is humus?
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Study Notes
Carbon Cycle Overview
- The exchange of carbon between the environment and living organisms is known as the carbon cycle.
Key Processes Driving the Carbon Cycle
- Photosynthesis: Plants utilize carbon dioxide (CO2) from the atmosphere to produce sugars, which serve as energy sources.
- Respiration: Living organisms break down sugar molecules to release energy, returning carbon to the environment in the process.
Role of Photosynthesis
- Plants absorb CO2 for the creation of sugars, integral to their growth and energy needs.
- Most living organisms obtain the carbon necessary for life by consuming these plants.
Role of Respiration
- Respiration results in the release of carbon back into the atmosphere as sugar molecules are broken down for energy production.
Role of Decomposition
- Fungi and bacteria decompose organic matter, returning essential components such as organic matter, water, and CO2 back to the environment.
Organic Matter Composition
- All forms of organic matter inherently contain carbon as a fundamental building block.
Role of Combustion
- The process of combustion, evident in burning wood or fossil fuels, adds carbon dioxide to the atmosphere, contributing to the carbon cycle.
Humus Definition
- Humus refers to organic matter at various stages of decomposition present in the soil, contributing to the characteristic dark brown or black color of fertile soil.
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Description
Explore the key concepts of the carbon cycle through these flashcards. Learn about the exchange of carbon between living organisms and the environment, as well as the crucial processes of respiration and photosynthesis. Mastering these concepts is essential for understanding ecosystem dynamics.
