Class 9 Exam > Class 9 Videos > Biology for Class 9 > Oxygen Cycle
Oxygen Cycle Video Lecture | Biology for Class 9
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23 videos|69 docs|55 tests
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FAQs on Oxygen Cycle Video Lecture - Biology for Class 9
| 1. What is the oxygen cycle? |  |
Ans. The oxygen cycle is the process through which oxygen is continuously exchanged and recycled between the Earth's atmosphere, biosphere, and lithosphere. It involves the processes of photosynthesis, respiration, combustion, and decomposition.
| 2. How does photosynthesis contribute to the oxygen cycle? | |
Ans. Photosynthesis is a vital process in the oxygen cycle as it is responsible for producing oxygen. During photosynthesis, plants and some other organisms use sunlight, carbon dioxide, and water to synthesize glucose and release oxygen as a byproduct.
| 3. What is the role of respiration in the oxygen cycle? | |
Ans. Respiration is an essential component of the oxygen cycle as it consumes oxygen and releases carbon dioxide. During respiration, organisms, including plants and animals, take in oxygen and break down glucose to release energy, thus releasing carbon dioxide as a waste product.
| 4. How does combustion impact the oxygen cycle? | |
Ans. Combustion, which includes burning of fossil fuels and other organic matter, affects the oxygen cycle by consuming oxygen and releasing carbon dioxide into the atmosphere. This process contributes to the greenhouse effect and climate change.
| 5. How does decomposition contribute to the oxygen cycle? | |
Ans. Decomposition plays a crucial role in the oxygen cycle by breaking down organic matter and releasing carbon dioxide. This process is carried out by decomposers like bacteria and fungi, which feed on dead plants and animals, releasing carbon dioxide during the process.
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Dec 23, 2024 Last updated |
Video Description: Oxygen Cycle for Class 9 2024 is part of Biology for Class 9 preparation.
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