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 Topic: Random Science Posts

 (Read 112946 times)
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  • Random Science Posts
     Reply #270 - May 03, 2014, 04:43 PM
    Oxygen is formed during fusion of Helium-3/4 into heavier elements in the core of stars.

    Hydrogen was there in the early universe when the energy levels of proton and electrons decreased as they cooled down and now longer had the energy to overcome the attractive electrostatic forces thereby fusing to become Hydrogen atoms.
  • Random Science Posts
     Reply #271 - May 03, 2014, 04:43 PM
    ^ Now I'm really just talking off of the impression I've gotten from the few classes that ever even touched on the subject, so don't take my word for it, but I believe that they think that most of the elements came from stars or dying stars that sort of did some nuclear magic on the subatomic particles, and that only a handful of the elements were made at the "Big Bang." So, in the end, it is still kind of chemistry and atmospheric conditions, but pretty extreme ones. Edit: what Descent said.

    But as for Earth's "free oxygen," I do know that one. Way back in the day, certain forms of unicellular life didn't really need oxygen but did sometimes produce oxygen in its diatomic form. I believe it wasn't until the bacterium evolved (and I am of the opinion that it did indeed evolve) to form the mitochondria that we got all fussy about needing oxygen anyway.
  • Random Science Posts
     Reply #272 - May 03, 2014, 05:12 PM
    Nuclear magic Grin

    But yeah, fusion takes place until Iron-56, and Cobalt-62...if the star undergoes supernova, nucleosynthesis can occur forming heavier elements.
  • Random Science Posts
     Reply #273 - May 03, 2014, 05:35 PM
    Quote from: Descent on May 03, 2014, 04:43 PM
    Oxygen is formed during fusion of Helium-3/4 into heavier elements in the core of stars.

    Can oxygen exist without plant life? Obviously I understand plants came second, but it's something that gave me pause.
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Random Science Posts
     Reply #274 - May 03, 2014, 05:40 PM
    Yep! It is made like Descent said, and it kicks around. It was used where needed, and the free oxygen you think of was from the prokaryotes probably.
  • Random Science Posts
     Reply #275 - May 03, 2014, 05:42 PM
    There was oxygen long before plants existed (at least on Earth).

    There is oxygen everywhere, not just atmospheric O2. Most of the Earth's crust is made up of metal or metalloid oxides.
  • Random Science Posts
     Reply #276 - May 03, 2014, 05:44 PM
    So the oxygen we get from plants, I'm assuming it's not a different kind. What's up with that? If we wiped out all the rainforests and whatnot, would we have to worry about breathing?
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Random Science Posts
     Reply #277 - May 03, 2014, 05:52 PM
    Not sure if anyone saw that sink hole in the usa on tv yesterday, it was huge, what is the cause of those ? Is it underground drilling, earth shifting ?  And do you think there are too many occurances than in the past, quite scary..
  • Random Science Posts
     Reply #278 - May 03, 2014, 05:54 PM
    Quod,

    Sorry, I probably should have been more clear about "free oxygen." It's the kind you're thinking of, the kind hanging out in the air and all that, doing nothing. Where we stand now, we have kind of evolved to rely on organisms that output oxygen, so yes, we need them. Back with the early unicellular life, that wasn't the case, and then we sort of evolved and relied heavily on a metabolic pathway that uses oxygen as the final electron receptor.

    My understanding is that everything sort of evolved under the particular conditions where there was accumulating free oxygen due to things like photosynthetic organisms and evolving organisms that began to employ the free oxygen, so it's hard to look back now and wrap your head around it.
  • Random Science Posts
     Reply #279 - May 03, 2014, 05:56 PM
    Quote from: suki on May 03, 2014, 05:52 PM
    Not sure if anyone saw that sink hole in the usa on tv yesterday, it was huge, what is the cause of those ? Is it underground drilling, earth shifting ?  And do you think there are too many occurances than in the past, quite scary..


    I have no idea, but if you guys ever hear about a sink hole swallowing up a woman in Connecticut that's probably going to be me. On my commute every day, I get stuck in a turning lane with a pothole that goes straight down to Hell that they keep filling in and it keeps somehow coming back within a week or two.  wacko
  • Random Science Posts
     Reply #280 - May 03, 2014, 05:59 PM
    Quote from: Quod Sum Eris on May 03, 2014, 05:44 PM
    So the oxygen we get from plants, I'm assuming it's not a different kind. What's up with that? If we wiped out all the rainforests and whatnot, would we have to worry about breathing?

    Well, oxygen released from plants is 02, atmospheric oxygen, which is what our cells need for respiration. So yes, with no plants, oxygen levels would gradually decrease so we would be screwed.

    Edit: Also what lua said...
  • Random Science Posts
     Reply #281 - May 03, 2014, 06:04 PM
    Quote from: lua on May 03, 2014, 05:54 PM
    Quod,

    Sorry, I probably should have been more clear about "free oxygen." It's the kind you're thinking of, the kind hanging out in the air and all that, doing nothing. Where we stand now, we have kind of evolved to rely on organisms that output oxygen, so yes, we need them. Back with the early unicellular life, that wasn't the case, and then we sort of evolved and relied heavily on a metabolic pathway that uses oxygen as the final electron receptor.

    My understanding is that everything sort of evolved under the particular conditions where there was accumulating free oxygen due to things like photosynthetic organisms and evolving organisms that began to employ the free oxygen, so it's hard to look back now and wrap your head around it.

    Actually I understand it quite easily, which I'm sure is a credit to you. Smiley Thank you for explaining.

    So we had just enough oxygen for plants to come about, and from there plants evolved to breath out (so to speak) oxygen, other life forms evolved later in an oxygen rick environment courtesy of the free oxygen given by plant life, and that's basically all their is to it? I'm assuming our world being so water rich is directly linked to free oxygen then. Am I missing anything?
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Random Science Posts
     Reply #282 - May 03, 2014, 06:07 PM
    I was under the impression that plants came much later after unicellular life, and formed split with other eukaryotes (animals), when they also assimilated other organelles such as chloroplasts.

    I would imagine early life got their energy through other means, and once they assimilated mitochondria, they could undergo cellular respiration which was more efficient.
  • Random Science Posts
     Reply #283 - May 03, 2014, 06:07 PM
    ^ Aw, thanks.

    Well, a little before the plants we had prokaryotes, little uni-cellular guys who performed photosynthesis, too, just the same as plants, and they are probably the ones responsible for getting enough oxygen around to get the rest of the ball rolling. I am not sure of the exact timeline, but I imagine plants came later.
  • Random Science Posts
     Reply #284 - May 03, 2014, 06:08 PM
    Cheesy Descent, you beat me again--by mere seconds!
  • Random Science Posts
     Reply #285 - May 03, 2014, 06:10 PM
    Hehe, we make a great science duo... Physics, Math, Biology, Chemistry - we're practically unstoppable!
  • Random Science Posts
     Reply #286 - May 03, 2014, 06:10 PM
    Quote from: Descent on May 03, 2014, 06:07 PM
    I was under the impression that plants came much later after unicellular life, and formed split with other eukaryotes (animals), when they also assimilated other organelles such as chloroplasts.

    I would imagine early life got their energy through other means, and once they assimilated mitochondria, they could undergo cellular respiration which was more efficient.

    I'll get back to you after I google some of those words.
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Random Science Posts
     Reply #287 - May 03, 2014, 06:20 PM
    Quote from: Descent on May 03, 2014, 06:10 PM
    Hehe, we make a great science duo... Physics, Math, Biology, Chemistry - we're practically unstoppable!

     Our only downfall will be the nightclubs and interactions with youths!
  • Random Science Posts
     Reply #288 - May 03, 2014, 06:37 PM
    Cheesy

    ...Though we'd also be missing Geology and Psychology.
  • Random Science Posts
     Reply #289 - May 03, 2014, 06:47 PM
    I'm sure google will help us with those.  yes
  • Random Science Posts
     Reply #290 - May 03, 2014, 07:02 PM
    Google, helping ignorant scientists since 1997 Grin

    Dammit, where is Quod and his questions...I'm bored..
  • Random Science Posts
     Reply #291 - May 03, 2014, 07:25 PM
    I live to enliven your life. Cheesy
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Random Science Posts
     Reply #292 - May 03, 2014, 07:31 PM
    ^  that arrow belongs up there somewhere lol, yeah my sis has one outside her house that keeps reapearing, the road collapses, i was amazed at how thin the roads are, few incces or so and then a deep hole..

    Xooo
  • Random Science Posts
     Reply #293 - May 03, 2014, 08:05 PM
    Quote from: Quod Sum Eris on May 03, 2014, 07:25 PM
    I live to enliven your life. Cheesy

    Quod, you were one the first person to reply to my introduction posts, and you are an active member on this forum. Your knowledgeable, have a great taste in the arts, and have easily the best humour on this forum.

    You enliven the lives of everyone here, not just me.

     far away hug


    I'm sorry for going off-topic, i just had to let that appreciation out. Seriously man, your fucking awesome, and I don't curse very often.


  • Random Science Posts
     Reply #294 - May 03, 2014, 08:42 PM
    Aww, I feel loved. far away hug
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Random Science Posts
     Reply #295 - May 03, 2014, 08:44 PM
    Quote from: Descent on May 03, 2014, 08:05 PM
    I don't curse very often.





    http://www.youtube.com/watch?v=s_osQvkeNRM

    http://www.youtube.com/watch?v=QZ0Ny6WhfLU

    ^ yes
    `But I don't want to go among mad people,' Alice remarked.
     `Oh, you can't help that,' said the Cat: `we're all mad here. I'm mad.  You're mad.'
     `How do you know I'm mad?' said Alice.
     `You must be,' said the Cat, `or you wouldn't have come here.'
  • Re: Random Science Posts
     Reply #296 - May 04, 2014, 06:31 AM
    Quote from: suki on May 03, 2014, 05:52 PM
    Not sure if anyone saw that sink hole in the usa on tv yesterday, it was huge, what is the cause of those ? Is it underground drilling, earth shifting ?  And do you think there are too many occurances than in the past, quite scary..

    It's a conspiracy. yes
    Devious, treacherous, murderous, neanderthal, sub-human of the West. bunny
  • Re: Random Science Posts
     Reply #297 - May 04, 2014, 06:34 AM
    Quote from: Quod Sum Eris on May 03, 2014, 05:44 PM
    So the oxygen we get from plants, I'm assuming it's not a different kind. What's up with that? If we wiped out all the rainforests and whatnot, would we have to worry about breathing?

    Actually, a large amount of the oxygen we breathe doesn't come from terrestrial plants. A lot of it comes from the oceans (algae, sulphate-reducing bacteria, etc). But wiping out forests is still not a good idea.
    Devious, treacherous, murderous, neanderthal, sub-human of the West. bunny
  • Random Science Posts
     Reply #298 - May 04, 2014, 06:56 AM
    ^Yeah there are a lot of problems with deforestation, not just in relation with atmospheric content. It leads to soil erosion, possible extinction of species whose natural habitat is the forest, as well as changes in climatic conditions.
  • Random Science Posts
     Reply #299 - May 05, 2014, 02:26 PM
    Here's a short part of a lecture from the greatest teacher of them all:

    https://www.youtube.com/watch?v=EYPapE-3FRw


    If anyone is remotely interested in Physics, I recommend reading or listening to "The Feynman Lectures on Physics", a series of  introductory physics lectures given by the man himself, also converted to textbook form for undergrads. It's conceptual so you don't need to know to much math. It's easy to understand and is the best conceptual book there is, to this day.
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