Podcast
Questions and Answers
Where does the phosphorus cycle start?
Where does the phosphorus cycle start?
What percentage of phosphorus do humans contain in their teeth and bones?
What percentage of phosphorus do humans contain in their teeth and bones?
How do plants absorb phosphate salts to obtain phosphorus?
How do plants absorb phosphate salts to obtain phosphorus?
How does the phosphorus cycle return phosphorus to the environment for reuse?
How does the phosphorus cycle return phosphorus to the environment for reuse?
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Why do farmers apply phosphate fertilizers on land?
Why do farmers apply phosphate fertilizers on land?
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What happens to phosphate salts when they do not dissolve in water properly?
What happens to phosphate salts when they do not dissolve in water properly?
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What is the second most abundant gas present in the atmosphere?
What is the second most abundant gas present in the atmosphere?
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Which process involves the conversion of molecular nitrogen into ammonia?
Which process involves the conversion of molecular nitrogen into ammonia?
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How do green plants contribute to the oxygen cycle?
How do green plants contribute to the oxygen cycle?
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Which element is the key building block of DNA and essential for plant growth?
Which element is the key building block of DNA and essential for plant growth?
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What is the process by which ammonia is converted into nitrites and then nitrates?
What is the process by which ammonia is converted into nitrites and then nitrates?
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What happens to carbon when plants and animals decompose?
What happens to carbon when plants and animals decompose?
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What is the process in which nitrogen gas is converted to ammonia by Azotobacter and Rhozobium?
What is the process in which nitrogen gas is converted to ammonia by Azotobacter and Rhozobium?
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How are nitrites formed in the nitrogen cycle?
How are nitrites formed in the nitrogen cycle?
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What happens during assimilation in the nitrogen cycle?
What happens during assimilation in the nitrogen cycle?
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Which stage of the nitrogen cycle involves converting ammonia into nitrate by bacteria in the soil?
Which stage of the nitrogen cycle involves converting ammonia into nitrate by bacteria in the soil?
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What is the final stage of the nitrogen cycle that involves nitrogen compounds returning to the atmosphere?
What is the final stage of the nitrogen cycle that involves nitrogen compounds returning to the atmosphere?
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How is ammonia produced in the nitrogen cycle?
How is ammonia produced in the nitrogen cycle?
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Study Notes
- Carbon, the sixth most abundant element in the universe, can exist in pure forms like diamonds or combine with other elements to form molecules. It makes up 18% of the human body in sugar, glucose, and proteins.
- In the carbon cycle, plants absorb carbon from the atmosphere for photosynthesis, which is then passed on to animals when they consume these plants. Upon death and decomposition, carbon is released back into the atmosphere.
- Some carbon not released back into the atmosphere becomes fossil fuels, which are used in man-made activities, contributing to more carbon being pumped into the atmosphere.
- Oxygen, the second most abundant gas in the atmosphere, is released by all green plants. Animals exhale carbon dioxide, which is used by plants during photosynthesis.
- Nitrogen, the most abundant element in the atmosphere, is essential for life as a key building block of DNA and crucial for plant growth.
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Description
Learn about the conversion of nitrogen gas to ammonia by bacteria like Azotobacter and Rhozobium, and the subsequent transformation into ammonium. Explore the nitrification process where ammonia is converted into nitrate by soil bacteria, along with the formation of nitrites. Discover how lightning, forest fires, and hot lava can also play a role in nitrogen conversion.
