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Biogeochemical Cycles Video Lecture | Geography Class 11 - Humanities/Arts
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FAQs on Biogeochemical Cycles Video Lecture - Geography Class 11 - Humanities/Arts
| 1. What are biogeochemical cycles? |  |
Ans. Biogeochemical cycles are natural processes that involve the cycling and transformation of elements and compounds through biotic and abiotic components of the Earth's system. These cycles include the movement of elements such as carbon, nitrogen, phosphorus, and water through the atmosphere, hydrosphere, biosphere, and geosphere.
| 2. How do biogeochemical cycles impact the environment? | |
Ans. Biogeochemical cycles play a crucial role in maintaining the balance and sustainability of the environment. For example, the carbon cycle regulates the Earth's climate by controlling the amount of carbon dioxide in the atmosphere. Similarly, the nitrogen cycle is essential for the growth of plants, while the phosphorus cycle is crucial for the formation of DNA and energy transfer in living organisms.
| 3. What are the main components of the carbon cycle? | |
Ans. The main components of the carbon cycle include the atmosphere, where carbon dioxide is exchanged between the air and living organisms through photosynthesis and respiration. Carbon is also stored in the lithosphere through the process of sedimentation and fossilization. Lastly, carbon is released back into the atmosphere through the combustion of fossil fuels and volcanic activity.
| 4. How does the water cycle contribute to the biogeochemical cycles? | |
Ans. The water cycle is an integral part of the biogeochemical cycles as it facilitates the movement of various elements and compounds. It transports nutrients dissolved in water from the land to the oceans, where they can be used by marine organisms. Additionally, the water cycle also plays a role in weathering and erosion, which affects the availability and distribution of essential elements in the environment.
| 5. What are the human activities that disrupt biogeochemical cycles? | |
Ans. Human activities such as deforestation, industrialization, and the burning of fossil fuels contribute to the disruption of biogeochemical cycles. These activities release excessive amounts of carbon dioxide into the atmosphere, leading to climate change. Similarly, the excessive use of fertilizers in agriculture can disrupt the nitrogen and phosphorus cycles, causing nutrient pollution in water bodies.
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Dec 22, 2024 Last updated |
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