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Thread: Science Homework Help

  1. #1 Science Homework Help 
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    Hey guys, well i have been struggling with this for quite some time now and its really bugging me because i cant seem to find the answer to it, i asked mum and dad and they have no clue, well heres the question...

    "If you excluded either becteria or animals from the nitrogen cycle. Could plants still obtain nitrogen through this process. Explain your answer."

    Can anyone answer it?

    Thanks


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  3. #2  
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    Start with the wiki description of the nitrogen cycle. Nitrogen cycle - Wikipedia, the free encyclopedia

    Now re-read with the conditions of your question in mind. Follow a couple of links if you need to.


    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." Winston Churchill
    "nature is like a game of Jenga; you never know which brick you pull out will cause the whole stack to collapse" Lucy Cooke
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  4. #3  
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    Yes, abundant nitrogen in the atmosphere is absorbed by soils from which plants' roots get furbished
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  5. #4  
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    How does it get into the soils? It doesn't get into a form absorbable by plants just by being there in its pure, gaseous form. Look at the graphic on that wiki page. There is no path for atmospheric nitrogen to absorbed by plants that doesn't require some chemical processing by organisms, vegetable or animal. (The portion that may come from compounds in minerals is so minuscule as to be ignored for these purposes.)
    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." Winston Churchill
    "nature is like a game of Jenga; you never know which brick you pull out will cause the whole stack to collapse" Lucy Cooke
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  6. #5  
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    Not shown on the chart in your link, but mentioned in the article, is the nitrogen that gets fixed by lightning strikes.
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  7. #6  
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    Yeah. We had a wild storm here earlier today and I thought of that. I explained the whole lightning gives rainwater plus fertiliser to my student who only got here from being driven through crashing thunder and lightning flashing all around.

    (One poor kid got hit by lightning a couple of suburb over. He's in hospital and he'll probably be OK.)
    "Courage is what it takes to stand up and speak; courage is also what it takes to sit down and listen." Winston Churchill
    "nature is like a game of Jenga; you never know which brick you pull out will cause the whole stack to collapse" Lucy Cooke
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