What are the most abundant elements in the Biosphere?

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The discussion centers on identifying the most abundant elements in the biosphere, with initial suggestions including oxygen, silicon, and aluminum based on various online sources. Participants emphasize that the term "biosphere" may refer to different contexts, such as environmental science or general science courses, which affects the interpretation of elemental abundance. Key elements highlighted include hydrogen, carbon, and nitrogen, which are crucial for life and significantly present in the biosphere. The conversation underscores the importance of clarifying the course context to provide accurate information. Overall, the thread seeks to establish a more accurate understanding of elemental abundance relevant to biological systems.
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My list is this.

1) Oxygen with 51%
2) Silicon with 25%
3) Aluminium with 7%
4) Others
I am not sure of these because I found them on the web and every site is different. I want to make sure so please anyone with Information post.

Thanks :)
 
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Anyone got the answers because I really need it. Thanks
 
This is supposed to be in Homework help. You say "biosphere." Is this for an environmental science course, 8th grade general science, or what? What you've listed for the first four are "planetary abundancesk," of which the "big eight" are O, Al, Si, Na, Mg, Ca, K, Fe; not much life there. What your text, instructor, or course outline means by "biosphere" can not be intuited without you informing us about the level and title of the course.
 
Hybr!d said:
My list is this.

1) Oxygen with 51%
2) Silicon with 25%
3) Aluminium with 7%
4) Others
I am not sure of these because I found them on the web and every site is different. I want to make sure so please anyone with Information post.

Thanks :)
Well others is all the other 89 naturally occurring elements.

Try hydrogen, as in two atoms of H for each atom of O in a water molecule.

Then carbon is pretty abundant - in all the life that is part of the biosphere.

And nitrogen - 78% of air.
 
Thanks guys I got it. Astronuc thanks for your input because the suggestions you made where quite right :)
 
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