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If you're seeing this message, it means we're having trouble loading external resources on our website. To log Carbon dating related words and use all the features of Khan Academy, please enable JavaScript in your browser.

Science Biology History of life on Earth Radiometric dating. Chronometric revolution. Potassium-argon K-Ar dating.

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K-Ar dating calculation. Carbon dating related words number, atomic mass, and isotopes. Current timeTotal duration Video transcript What I want to do in this video is kind Wife fucks stranger in car introduce you to the idea of, one, how carbon comes about, and how it gets into all living things.

And then either later in this video or in future videos we'll talk about how it's actually used to date things, how we use it actually figure out that that bone is 12, years old, or that person died 18, years ago, whatever it might Carbon dating related words.

So let me draw the Earth.

Carbon dating related words

So let me just draw Carbon dating related words surface Carbon dating related words the Earth like that. It's just a little section of the surface of the Www black woman fuck com. And then we have the atmosphere of the Earth. I'll draw that in yellow. So then you have the Earth's Carbbon right over here.

Let me write that down, atmosphere. And I'll write nitrogen. Its symbol is just N. Worxs it has seven protons, and it also has seven neutrons. So it has an atomic mass of roughly Then this is the most typical isotope of nitrogen. And we talk about the word isotope in the chemistry playlist.

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An isotope, the protons define what element it is. But this number up here can change depending on the number of neutrons you have.

So the Carbon dating related words versions of a given element, those are each called isotopes. I just view in my head as versions of an element. So anyway, we have our atmosphere, and then coming from our sun, we have what's commonly called cosmic rays, but they're actually not rays.

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They're cosmic particles. You can view them as just single protons, which is the same thing as a hydrogen nucleus. They can also be alpha particles, which is the same thing as a helium nucleus. And there's even a few electrons. And they're going wprds come in, and they're going to bump into things in our atmosphere, and they're actually going to form neutrons.

So they're Carbon dating related words going to form neutrons.

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And we'll Carbon dating related words a neutron with a lowercase n, and a 1 for its mass number. And we don't write anything, because it has no protons down here.

Like we had for nitrogen, we had seven protons. So it's not really an element. It is a subatomic particle.

But you have these neutrons form. And every now and then-- and let's Carbon dating related words be clear-- this isn't like a typical reaction.

But every now and then one of those neutrons will bump into one of the nitrogen's in just the right way so that it bumps off Carbon dating related words of the protons in the nitrogen and datong replaces that proton with itself.

So let me make it clear. So it bumps off one of the protons. So instead of seven protons we Tinder hookup stories singapore have six protons. But this number 14 doesn't go down to 13 because it replaces it with itself.

So this still stays at And now since it only has six protons, this relatdd no longer nitrogen, by definition. Carbon dating related words is now carbon. And that proton that was bumped off just kind of gets emitted.

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So then let me just do that in another color. So plus. And relatrd proton that's just flying around, you could call that hydrogen 1.

And it can gain an electron some ways. If it doesn't gain an electron, it's just a hydrogen ion, a positive ion, either way, or a hydrogen nucleus.

But this process-- and once again, it's not a typical process, but it happens every now and then-- this is how carbon forms. So reoated right Interesting conversation questions for couples is carbon You can essentially view it as a nitrogen where one of the protons is replaced with a neutron.

And what's interesting about this is this is constantly being formed in our xating, not Carbon dating related words huge quantities, but in reasonable quantities. So let me write this down. Carbon dating related words

Constant formation. And let me be very clear.

Let's look at the periodic table over here. So carbon by definition has six protons, but the typical isotope, the most common isotope of carbon is carbon So carbon is the most common. So most of the carbon in your body is carbon But what's interesting is that a small fraction of carbon forms, and then this carbon can then also combine with oxygen to form carbon dioxide. And then that carbon dioxide gets absorbed into the rest of the atmosphere, into our oceans. It can be fixed by plants. When people talk about Carbon dating related words fixation, they're really talking about using mainly light energy from the sun to take gaseous carbon and turn it into actual kind of organic tissue.

And so this carbon, it's constantly being formed. It makes its way into oceans-- it's already in the air, but it completely mixes through the whole atmosphere-- and the air. And then it makes its way into plants. And plants are really just made out of that fixed carbon, that carbon that was taken in gaseous form and put into, I guess you could say, into kind of a Carbon dating related words form, put it into a living form. That's what wood pretty much is. It gets Carbon dating related words into plants, and then it gets put into the things that eat the plants.

So that could be us. Now why is this even interesting? I've just Carbon dating related words Bethany MO adult personals mechanism where some of our body, even though carbon is the most common isotope, some of our body, while we're living, gets made up of this carbon thing.

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Well, the interesting thing is the only time you can take in this carbon is while you're alive, while you're eating new things. Because as soon as you die and you get buried under the ground, there's no way for the carbon to become part of your tissue anymore because you're not eating anything with relaed carbon And what's interesting here is once you die, you're not going to get any new carbon And that carbon that you did have at you're death is going to decay via beta decay-- and we learned about this-- back into nitrogen So kind of Carbon dating related words process reverses.

Carbon dating related words it'll decay back into nitrogen, and in beta decay you emit an electron and an electron anti-neutrino. Dating a kleptomaniac won't go into the details of that. But essentially what you have happening here is you have one relatsd the neutrons is turning into a proton and emitting this stuff in the process.

Now Wells spa milwaukee is this wodrs So I just said while you're living you have kind of Carbon dating related words carbon And carbon is constantly doing this decay thing.

But what's interesting is as soon as you die and you're not ingesting anymore plants, or breathing from woeds atmosphere if you are a plant, or fixing from the atmosphere.

And this even applies to plants. Once a plant dies, it's no Carbob taking in carbon dioxide from the atmosphere and turning it into new tissue.

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The carbon in that tissue gets frozen. And this carbon Interracial cuckolding stories this decay at a specific rate. And then you can use that rate to actually determine how long ago that thing must've died.

So the rate at which this happens, so the rate of carbon decay, is essentially half disappears, half gone, in roughly 5, years. And this is actually called a half Carbon dating related words. And we talk about in other videos.