Radiometric dating / Carbon dating
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- Опубликовано: 11 июн 2024
- How are the ages of fossils and rocks determined? This video explains the basics behind radiometric dating.
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I have been looking for a video that CLEARLY explains carbon dating for my middle schoolers. This one hit the nail on the head. Thank you!
Beverly Biology Guy, you ROCK! Thank you so much! I have watched several videos on this subject but still didn't totally get one minor aspect of it. After watching yours it CLICKED! You are a wonderful teacher. Please keep doing what you're doing. :)
Same here. Never really understood what an isotope was until this video. Very clear and comprehensible to the layperson.
Thank you! This was a lifesaver for my intro to geology class!
So clear and informative- THANK YOU!
Honestly, I was scared to pick up my Geography book bcz the stuff is so scientific but this video helped me realise that Geography can't be that difficult if someone explains it that well. Thank you so much.
I'm sorry. Do you mean Geography or Geology? Geography has to do with maps; Geology has to do with layers of the the planet Earth.
omg this explained radiometric dating so well!! you are a lifesaver!
thank you so much😊
I’m here from mr. Ricco’s class
AYYY ME TOOOO
EYYY HOWS THE QUARANTINE GOING
same
what a gamer
@@omletesyum3592 Guys my mom hit me with a belt and my brother is bleeding out, this is so sad can we get a correct spelling or Mr Riccio name...
I finally got it thanks to your video, now I hope I don't forget it for my final
This video saved me. Thank you. I would’ve been dead next week if I didn’t saw this
Thanks for the clear explanation
thank you! this type of video help me to understand it for my assignment!
This is the besst explaining video, THANK YOU
Thank you for the informative video. I would appreciate your response to the following question: how do they know whether 50% C-14 (or less or more) has decayed when considering organisms that went extinct?
I love this channel, it's so informative.
The layers were laid down at the same time: water does not carry only one substance for millions of years, and so cannot lay down only one layer of one substance at a time for millions of years: rather water holds all kinds of substances together, which means that the substances self-separate according to their mass as water slows down, and are laid down one on top of the other, but not one after the other. We see this in river estuaries today.
I was kept away from this stuff, religious, but am now very interested and this helped so very much. I thank you so much
I was told as a child that "science was denigrating religion" but now I believe it is the other way around.
RMCD was proven inaccurate in 2018
@@lifeathand1062 I'd like to see a link to that if you have an article on it. But that is not the only method of radiometric dating either. From what I understand is they recently found the the number of carbon 14, I believe its carbon 14 someone who knows more can correct me, in the atmosphere changes so they have to account for that when they didn't before. But if you have an article saying something more I'd love to see it.
everything was very clear...thanks for making the video
So if you get an influx of carbon 12 introduce into the atmosphere- doesn’t it throw off the measurement?
Have c-13 dating been applied to previous dates given to other fossils?
fart
Good question I’d like to know as well
I get radiometric dating and all but how do you know the exact years? Like how did they come up with the theory that it takes 5730 years? That’s my main question because everything else about radiometric dating is super easy to understand but that seems to never be explained.
This helps me so much!!!
I've watched this seven times today cause I have a test on it and I'm freaking out. I'll come back and say what I got!
@Noah Martinez Bro I totally forgot about this haha, I got a 100% tho!
Thank you this was very helpful
This is great. Thank you! Subscribed.
Hi there!Is it possible to ask for sample problems of this?Thanks in advance!
Well explained sir
Clear explanation. Superb
I get confused by the term human, does it only refer to homo sapiens, or does it describe other hominins?
Please can you do a video on phylogenetic tree because you are the only channel on RUclips who explains things better. Thank you
Coincidentally, I've been working on this topic next. It should be ready soon.
So helpful !
A ROCK ONCE MADE ENTIRELY OF CARBON-14 WAS DISCOVERED. OVER THE YEARS IT HAS DECAYED TO 25% CARBON, CAN THE AGE OF THE ROCK BE DETERMINED?
That's not possible. C14 is made by cosmic ray bombardment of nitrogen in the upper atmosphere. A rock cannot be made of C14. Coal (a "rock" for you?) is made of C12, the C14 it might have had 250 million years ago is long gone. You seem to have a problem with your SHIFT KEY...
Ok how do you know a fossil has lost x amount of whatever isotope we're looking at
Let me guess he never responded to your question...
How do u calculate the percentage of the c14 on the fossil?
In the classical method by measuring the beta radiation from the decay of C14 and by measuring the amount of C12 by normal chemical methods. Alternatively, both can be measured by mass spectrometry which is the more modern method.
I'm confused on two things:
1) how do we know the C-14/C-12 ratio of the atmosphere at the time the animal was alive?
2) how do we know the original amount of carbon-14 that was in that animal? Is it cuz the converted nitrogen is also conserved? If today's flies are alive with 1g of carbon-14 why are we assuming that an ancient fly also original had 1g of carbon-14? What if the ancient flies held on to 2g of carbon-14 cuz they were bigger or something or like their bodies worked different cuz evolution? does biomass come into the equation? what if there was an animal that snacked on ancient foods that have a diff ratio from the environment, won't it's ratio be of the food it eats not the environment, like a bacterium that eats crude oil in underground wells?
that was more than two things...pls help
edit: how do we know the earth's radiation has been constant, and that the conversion has been constant?
1. Dunno
2. The nitrogen-14 wont go away so we can still know how much C-14 turned into N-14
3. C-14 doesn’t change into N-14 cuz of radiation. C-14 releases radiation itself. And it does so at an constant rate. Therefore, when releasing radioactivity it turns slowly into N-14. Scientists have already found out how long that takes (Half-life of C-14: 5730 years, so total time is 11460 years). By finding the ratio between C-14 and N-14 they can find out how old is a fossil.
I think the amount of C-12 doesn’t matter so nobody cares about the ratio of C-12 and C-14 in ancient times in trees or in the animal’s food and blah blah blah 😂
Why does carbon 14 only start decaying after the animal dies?
Thank you sir
I understand the concept... I'm just wondering how we know something is "%50" radiocarbon. 50 percent compared to what? Horses today?
Yeah I think it's in relation to a very recent dead animal.
how to make an animated video lilke this?
thanks ♥️
This guy is the quietest person. 😂Even with all my volumes turned up to the max it's hard to hear at times. Maybe my hearing is just bad. haha
What😊
But you cannot prove or know how much carbon 14 was in an item before it started to decay. So if you were to count the drips of water from a faucet, for example, and establish that it would take 10 hours to fill an empty container, this would only be accurate if the container was empty. What if it was a quarter full before the faucet started dripping and you had no way of knowing that is was already a quarter full? Your test, as with the carbon 14 would be inaccurate!!!
>But you cannot prove or know how much carbon 14 was in an item before it started to decay.
I'm pretty sure they can, otherwise they wouldn't be able to calculate it's age, right? Listen to 2:43 again. The ratio of carbon 12 and 14 in a living organism is going to be similar to that in an atmosphere. So if you want to know how much carbon 14 was in something before it died, just look at carbon 12 (which does not decay) and calculate
I'm curious of the results of carbon dating a chicken bone from KFC. Would eleven herbs and spices alter the results?
You want to spend $1000 dating a chicken bone from KFC - when was that branch opened - 2000 years ago?
5,730 is a magic number to measure how much it takes half of the amount of carbon 14 in a sample to decay? How exactly did someone measure this?
It’s not a magic number lmfao. The level of radioactive Carbon was measured in organisms that had just died. This is a very small value and multiple experiments were done to measure the levels and the results averaged. The samples were then measured after a period of time to find the new levels of radioactivity. The loss of radioactivity was then extrapolated backwards to find the half life.
The results were then tested and refined by measuring the levels of radioactive carbon in samples of organic material from archeological sites of known ages. The levels of radioactive material in a house built in 1200 AD could be determined and compared to the extrapolated experimental curve. The assumption that the wood used in the house was close to the known age of the construction of the house leaves a plus or minus value to the age determination of the wood.
So no, they didn’t just randomly choose 5,730.
@@1999_reborn You do understand that assumption is not absolute? There's so much that goes on underneath the earth and to entertain the idea that you know how much carbons, atoms, and other elements that are on a single fossil or rock is lunacy. For example, there are a handful of "experts" who have concluded that our planet is billions of years old due to the fact of how much "parent" elements decay to "daughter" elements in rocks or species, this is called radiometric dating method. In simple terms, all radiometric dating method is based on the rate that radioactive elements decay in the rocks (a similar approach to this video). So, how do these "experts" know the starting state of these rocks-particularly the ratio of parent atoms to daughter atoms in the rocks to begin with? That's the point of my question concerning this video presentation. They're using a similar logic if it's real logic, to say the least.
Paulo Da Silva Alright lets go one point at a time. You claim that it’s “lunacy” to think that scientists can measure the amount of carbon-14 on a single fossil or rock. Accelerator mass spectrometry is a method that scientists use to directly measure carbon-14 content relative to the amount of carbon-12 and carbon-13 present. So your claim that scientists can’t measure it is false. What evidence do you have that accelerator mass spectrometry isn’t a valid method for measuring carbon-14.
It seems to me that you’re just ignorant of chemistry and therefor don’t believe it’s possible. I’m wondering if this is for religious reasons...
@@1999_reborn I understand how scientists claim to measure the number of carbons relative to another and vise versa. You might as well say that they know the exact amount of stars in the solar system, or they have a valid understanding of the amount of dirt, rocks, and species. They could even measure the amount of wind that moves on God's green earth. What I'm saying to you, my friend, this universe is so vast that it's impossible for the human mind to conceive, it's immeasurable. The best we can do is estimate and speculate. And to answer your question, yes, it is for religious reasons I draw my conclusion. You're a good thinker. I appreciate your input. You have earned my respect.
@@paulodasilva3977 Your religion has blindfolded you and to make matters worse you are actively seeking to blindfold other people.
Thanks
It was helpful
We can also calculate age of an element with 1.5 lifetime right?
Sound is very low.😔
so who got answers?
Thanks for explaining how the concept works...However, it amazes me how concepts like these are accepted, without explaining aspects such as; how can we possibly know the half life amount is accurate ?
It can be calculated. The rate of decay is constant and can be measured, so if you measure the ratio of parent to daughter isotope you can calculate the half life.
you can test it
@@mikaylaldavis Exactly. Every individual mass is not going to have the exact same amount of anything, plus other variables, like the examples you gave. Plus, it would take thousands of years of humans recording, measurements of decay to specimens to confirm accuracy of these formulas, which really are general prediction models.
did I ask?
marygrace do I care
Sushi Fishy LMAO my science teacher made me watch this as an assignment
@@marygrace2981 mine did too
God Bless.
I chose to watch it
POG
How do you know that things are older the further down you go?
...what
Goldmegaman1000 in terms of relative dating one of the first things he said was when you look at layers of rock, the layer on top is the youngest the next layer down is older and the next layer down is the oldest. So how does he know the next layer down is older and not younger or the same age?
@@vincenzopromedia Well I'm not a geologist but my guest is that's how sedimentary deposit works, Over time things get buried how in the hell would you end up with the younger rock underneath the uppermost layer
@@goldmegaman1000 I mean it's on earth not a test tube. It's not a controlled environment. Random things happen that leave your head spinning all the time. That might be true for rocks but what about everything else?
@Isabella Wahbeh The weird thing about the law is that it's a law, and it's not free to other philosophy that could potentially explain the phenomenon. You can use it to explain things, or not, if you don't want to, which is weird. So is it that way, or not? The fact that you could use it as an explanation, tells me that it's not necessarily true.
How am I supposed to know if this is the process of artificial selection?
Btw anybody from faller?
does anyone else get directed directly to 7 minutes and some seconds?.
yassss slayyy 💥💥💥
bru mr bogan be making us watch what is this every one dislike video
Thanks a lot is was so good
mr garnett😎
How do we know the concentration of carbon 14 in the atmosphere hasn’t change over 1,000s of years?
RMCD was proven inaccurate in 2018
Book has nth to offer except headaches, thanks
Volume too low
bro whos here for science
class
im carl wheezer
Voice is not so clear
Who’s here from old man lunts class ( mr Lunt)
no one just you
lol
rocks amirite 😋😋
Jesus loves you
Very epic i love this vedio emikk is suck
young earth creationists..were you all at?
🤣🤣🤣
I'M DONE with geology
I need my normal pills
*twrash
Dirt from an enormous dead creature lol
SPEAK LOUDER!!
I've watched this seven times today cause I have a test on it and I'm freaking out. I'll come back and say what I got!
We are still waiting for you to tell the result
@@millantronni3242 I got a 100%🙂🙌
@@maddysullivan5305
aww, gratz
@@millantronni3242 Thank you!
Wow that's me tomorrow on the 25th of April 2024 wish me luck
so helpful!!!