Well, organisms doing respiration take in oxygen and produce carbon dioxide, right? And organisms doing photosynthesis take in carbon dioxide and produce oxygen?
Yes. Would you like me to explain my understanding of the Q, too?
what would the graph look like if the two were exactly in balance?
(and nothing else was changing the amount of carbon dioxide present)
A balance between oxygen/photosynthesis/respiration?
Wouldn't the graph just be a straight line?
we would have a horizontal line, right?
glad we are in agreement. But we don't have a horizontal line, we have something that is gradually increasing, and not as a straight line, either. What does that suggest to you?
It means that they are unbalanced, correct?
Or one is more than the other
yes. and is the carbon dioxide concentration in the atmosphere increasing or decreasing?
if we want to keep the carbon dioxide concentration about the same, do we need to plant more forests, or chop them down?
Plant more forests because they produce oxygen and take in CO2 via photosynthesis.
right. there are some who think we should repeatedly plant forests and chop them down, burying the results, but that seems a bit impractical to me!
so, looking at the graph, which class of organism is expanding more rapidly?
relative to the other, I guess
It would be whatever organism that produces carbon dioxide. (What is their class called?)
Aren't there other factors such as pollution that contribute to the rapid increase of Co2 in the atmosphere though?
yes, but the problem asks for the relationship between the respiring and photosynthesizing organisms
Okay. Would you like me to share my notes with you on this lesson? You can use it as a reference to your answers?
so, it looks to me like the plants are not keeping up with the carbon dioxide entering the atmosphere. sure, go ahead...
http://prntscr.com/7dkuol It's a little long, but those are just the notes that are relative to answering the question(s).
…I have very limited time to complete this homework assignment and I'm not sure if you're reading the notes or multitasking @whpalmer4 :) I don't mean to have that come out as rude or disrespectful because everything you've told me so far has truly helped me understand the concept a little better.
well, a bit of both. I think the graph shows that the photoautotrophs are not keeping up with the amount of carbon dioxide being produced. I don't know what to conclude from the graph about the effects, other than something will change — perhaps the plant life is going to grow like crazy in the CO2 rich air, but it seems like that probably isn't it (it's not like they are stripping the atmosphere of all of its CO2 now, right?) And my understanding is cyanobacteria produce their energy by photosynthesis, so if their population goes up, the carbon dioxide concentration curve should stop increasing as rapidly as it is That's about all I got for you...
Do you have anything to add to this?
No, I don't, other than to caution that you might have to go pretty far to get to the point where either class had trouble breathing...
True, and it is around a specific area anyway. But I think they're asking worst-case scenarios? I'll be sure to mention that, too. Thank you so much for your help! :)
worth about as much as you paid for it, I fear :-)