1.2. The Carbon Cycle

    Cards (50)

    • The carbon cycle involves natural and human-influenced processes
    • The carbon cycle includes exchanges between the atmosphere, land, oceans, and living organisms.

      True
    • Decomposition releases CO₂ back into the atmosphere and soil.
      True
    • Order the key processes within the carbon cycle:
      1️⃣ Photosynthesis
      2️⃣ Respiration
      3️⃣ Decomposition
      4️⃣ Combustion
    • What is the carbon cycle?
      Exchange of carbon atoms
    • Match the process with its description:
      Photosynthesis ↔️ Plants absorb CO₂ and convert it into glucose
      Respiration ↔️ Plants and animals release CO₂
      Decomposition ↔️ Decomposers break down organic matter
      Combustion ↔️ Burning fossil fuels releases CO₂
    • Combustion releases CO₂ into the atmosphere
    • Human activities have disrupted the equilibrium of the carbon cycle.
      True
    • Burning fossil fuels releases large amounts of CO₂ into the atmosphere
    • What are the three main reservoirs involved in the carbon cycle?
      Atmosphere, land, oceans
    • Arrange the following carbon cycle processes in a logical sequence of carbon transfer:
      1️⃣ Photosynthesis
      2️⃣ Respiration
      3️⃣ Decomposition
      4️⃣ Combustion
      5️⃣ Ocean Exchange
    • Oceans act as natural carbon sinks by absorbing CO₂ through dissolution and biological processes
    • Artificial carbon sinks, such as underground storage, require suitable geological formations
    • Ocean exchange is a process where CO₂ dissolves from the atmosphere into the oceans and vice versa.

      True
    • What is released from volcanoes through eruptions?
      CO₂
    • What is the main source of carbon absorbed by plants during photosynthesis?
      Atmospheric CO₂
    • What human activities have disrupted the carbon cycle's equilibrium?
      Fossil fuel combustion and deforestation
    • Match the carbon sink with its benefit:
      Oceans ↔️ Reduces atmospheric CO₂ and buffers acidity.
      Forests ↔️ Stores carbon in biomass and supports biodiversity.
      Soils ↔️ Enhances fertility and reduces CO₂.
    • Carbon sinks help to mitigate the effects of climate change
    • Steps to address disruptions in the carbon cycle:
      1️⃣ Reduce fossil fuel combustion
      2️⃣ Increase reforestation efforts
      3️⃣ Develop carbon capture technologies
      4️⃣ Promote sustainable land use practices
    • What happens to the ocean's ability to absorb CO₂ when it becomes acidified?
      Decreases
    • What releases CO₂ back into the atmosphere as organic matter is broken down?
      Decomposition
    • The carbon cycle involves processes that transfer carbon between the atmosphere, land, and oceans
    • Which process releases CO₂ back into the atmosphere as plants and animals break down glucose for energy?
      Respiration
    • What is the primary role of carbon sinks in the carbon cycle?
      Absorb and store CO₂
    • Match the natural carbon sink with its key reservoir:
      Oceans ↔️ Absorb CO₂
      Forests ↔️ Store carbon in biomass
      Soils ↔️ Store carbon from organic matter
    • Cement production releases CO₂ from limestone, contributing to atmospheric CO₂ levels.

      True
    • What molecule is absorbed by plants during photosynthesis?
      CO₂
    • Burning fossil fuels for energy is an anthropogenic source of CO₂
    • Cement production releases CO₂ from heating limestone
    • Match the carbon cycle process with its description:
      Photosynthesis ↔️ Plants absorb CO₂ and store carbon.
      Respiration ↔️ Plants and animals release CO₂.
      Decomposition ↔️ Decomposers break down organic matter.
      Combustion ↔️ Burning fossil fuels releases CO₂.
    • What are three natural carbon sinks mentioned in the study material?
      Oceans, forests, and soils
    • Deforestation reduces the ability of forests to store carbon.

      True
    • What is the main human-induced disruption to the carbon cycle?
      Imbalance in carbon exchange
    • Increased atmospheric CO₂ enhances the greenhouse effect and global warming.
      True
    • What do plants and animals release during respiration?
      CO₂
    • Which reservoirs are involved in ocean exchange within the carbon cycle?
      Atmosphere and Oceans
    • Plants absorb CO₂ from the atmosphere during photosynthesis
    • What do plants store carbon in during photosynthesis?
      Biomass
    • In photosynthesis, plants absorb CO₂ from the atmosphere and convert it into glucose
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