What Is The Geologic Time Scale? 🌎⏳⚖ The Geologic Time Scale with Events

[@SciencewithMrHarris]

My new #geology video on the Structure of the Earth is now LIVE! Check it out here, and let me know what you think! kzbin.info/www/bejne/jn7NnIJtZ7CJoKc

[@yousefbabgi-o4i]

dude you basically just uncovered 4.6 billion years in only 2 mins and 45 seconds you explain it in such an easy and understandable way thanks a lot

[@yousefbabgi-o4i]

and I just subscribed

[@isseihyodou8800]

Unsubscribed now, if u don't wanna be mad

[@yousefbabgi-o4i]

im still subscribed @@isseihyodou8800

[@SciencewithMrHarris]

hey thank you so much!

[@FilTubeMan]

Started farting oxygen. Nice

[@SciencewithMrHarris]

😁

[@Lord-jq7hv]

I literally did that …

[@chi.chiyuuu]

Deserve more views!! Thank you i was able to learn the basic of geologic time scale. You're such a good teacher and explain it well in a very understandable way.

[@chi.chiyuuu]

Sir you can also do other videos mostly in biology cause it's way to many explanation on that and some students stressed about biology including me HAHAHAH

[@SciencewithMrHarris]

Haha I'll do my best! Thanks for the kind words, good luck in Biology!!

[@justanormalstudent2402]

This is much better than just reading the textbook. So entertaining. Great video

[@SciencewithMrHarris]

Wow, thanks! So glad you enjoyed it

[@dariopedro4568]

I can’t describe how much I loved this video, and i’m a programmer, so you made a random geology video looks amazing, thank you ❤

[@W1z4rdX]

You just summarized all of that in 2 minutes 45s!? Thank you ,this really helped with my life science exam, it was so easy to understand

[@Very0nn]

THANK YOU SO MUCH FOR THISSS, ITS SO SIMPLE AND UNDERSTANDABLE!! ❤❤ I am now obsessed with your channel

[@anubhavsingh8374]

Damn... This video is just what we all needed... soo clear now... I mean... you made it sooo simple.. thanks harris...earned a sub

[@SciencewithMrHarris]

thanks so much happy I was helpful!

[@AyeshaReyes-f9c]

OMG you are the most entertaining to watchhh, you deserve more subscribers and views bro. The music background is givinggg ✨✨✨

[@VG__]

Would appreciate if the bg music is bit low volume so ur explanation is all i can focus on! Thankyou for this quality content sir :)

[@sauravyadav3203]

Best video geological time scale

[@alinepereira4935]

It's fun and it's cool. Bro, you make understand all that was hard for me to understand. Thanks a lot!

[@mylessutton-v9r]

u made my day, no joke this gave me chills

[@lei1921]

I think he's married to one of the amoeba sisters or brother.....

[@PrafullaPradhanBoudh]

Thanks for the simplest explanation

[@casseylorrainemanguerra6652]

This is easy to understand, thank you!!

[@KoolinHandso]

Thank you so much I clutched studying, what would take 1 hour in 2 minutes!!

[@TheOzzieRob]

Loved the video and the humour.

[@alnericamiguel3062]

so fun to watch

[@shreem2734]

Thanks for the simplest explanation❤

[@SciencewithMrHarris]

You're welcome 😊

[@John-115]

Great work

[@abhisparkZ]

Woahh my 30 mins of reading books in a enthusiastic way

[@aki-gt1sg]

WHAT A GREAT VIDEO !! you're making learning more fun. btw new subscriber here ^^

[@SciencewithMrHarris]

Hey thank you so much! Appreciate the kind words and the sub :)

[@Sammyboi_Gaming]

Very Helpful. I know it came out 2 years ago but this is a great video!

[@SciencewithMrHarris]

Glad it was helpful!

[@claud952]

I have an exam tommowro , your a life saver🙌

[@SciencewithMrHarris]

Happy to help, i hope it went well!

[@jacoblerner2872]

This is an amazing video. It really helped me understand the topic.

[@SciencewithMrHarris]

I'm so glad!

[@lamardavis8028]

Bro shouldn't grab my attention this much 😭 w vid

[@avanipaliwal6700]

Super amazing explanation and video 🤩

[@SciencewithMrHarris]

Thank you so much 😀

[@nosinzamanlekha3220]

The background music is just too much

[@jennysulit1597]

Its so cool and it gives me goosebumps. I love it 😻❤️❤️

[@SciencewithMrHarris]

Wow I'm so glad you like it!! Thank you for the comment :)

[@Silly_Mousequarade]

Thank you for this video- Im having an exam tomorrow and THIS was the hardest one for me *Cuz i was absent* This is so easy to understand and im so happy for it :D

[@BlackJesus_888]

same other videos about this be saying a lot of advanced words

[@SciencewithMrHarris]

Hey that's great! Hope the exam went well!!

[@astroletras]

Great video

[@SciencewithMrHarris]

Thanks!

[@PrafullaPradhanBoudh]

I subscribed your Chanel

[@milestardieu3051]

Very enjoyable :)

[@jayzelapy]

thank you

[@SciencewithMrHarris]

You’re welcome!

[@jelinevelasco1355]

Wow i understand that's so easy

[@bbc2121]

very wholesome

[@devinegracepaaco1781]

what a great video sir! can i ask,if what editing app did you use?(sorry for the grammatical error)

[@SciencewithMrHarris]

Thanks for the comment! I created this video in Adobe After Effects!

[@lilyai4062]

Gts in a nutshell. But fr though, thank you for this, I understand it well now

[@SciencewithMrHarris]

That’s great you’re welcome!

[@kylamoniqueabejar1475]

Thank you! This is very helpful😊

[@SciencewithMrHarris]

You’re so welcome thank you for the comment!

[@behaviouralsassonomics]

Amazing!

[@sou1m4te]

cramming before my science final!! this video helped me :)

[@SciencewithMrHarris]

Glad I could help!

[@MichaelSharpBLACKDRUMMIKE]

I SUBSCRIBED

[@SciencewithMrHarris]

Thank you!

[@darciedixon8065]

This is so good!!!

[@anakin1028]

Mr. Harris, is it true that eras and periods are marked by the catastrophic events Earth experienced? Great content btw, may you have more subscribers

[@SciencewithMrHarris]

Thanks for the question and for the kind words!! In the Phanerozoic, the eras are generally defined by mass extinction events, one of which would be the asteroid that killed all the dinosaurs. My understanding is that the boundaries between the eras before this, for example from the Archean to the Proterozoic are more gradual or less understood, partly because there are just fewer rocks around from so long ago to study. Periods can end with mass extinctions, for example there was a large extinction at the end of the Ordovician period, but they don't necessarily have to. For example there is no clear boundary between the Jurassic period and the Cretaceous period in the Mesozoic 🐱‍🐉. I hope that's helpful and thanks again for the question!

[@jcrinauj5201]

Is it alright if i use some part of this video for my project?

[@SciencewithMrHarris]

Thank you for asking! What’s your project?

[@StaticBlaster]

I find the number 1 BILLION fascinating because it's so large humans can't truly comprehend that number. Think about one THOUSAND seconds -> that's 16.67 minutes. one MILLION seconds -> roughly 11.5 DAYS and finally, one BILLION seconds is almost 32 YEARS. Let that sink in. I'm still in awe. The Earth is extremely old. And it's 18 galactic years old.

[@SciencewithMrHarris]

It's so crazy! I did that 1 billion seconds calculation with my students earlier this year and I was so shocked. Thanks for your comment!

[@StaticBlaster]

@@SciencewithMrHarris yeah its just astounding!!! And you're welcome. 🙂

[@Mary-cn7ii]

This was a great video! Looking forward to the video about the Anthropocene era.

[@SciencewithMrHarris]

Thank you so much! I'm working on it!

[@royzuniga4759]

Thanks !!

[@SciencewithMrHarris]

You're welcome!

[@amazingcabbage39]

This video makes me feel like a kid

[@SciencewithMrHarris]

That makes me so happy :)

[@hh6214]

Hi I would like to ask is the cenozoic including the mammals???

[@Liessssssssssss]

yes

[@atpro2231]

Music is high

[@miloblake7344]

what is up my freshmen

[@Thyalwaysseek]

A few questions: 1/ How do scientists know how old earth is? 2/ How can scientists know how old rock is when it can't be carbon dated 3/ How do scientists know how old a fossil is when carbon dating can only be reliably measured to 5,730 years. Seems to me geology is based on nothing more than theories that modern scientists now present as absolute fact.

[@SciencewithMrHarris]

It’s a great question! Always good to think critically. The answer to all three is basically the same. You’re absolutely right that radiocarbon dating has a limited length of time it can be used over. Luckily there are other elements that have a half lives that are much longer. For example Potassium-40 decays into Argon-40 over a time scale that can go back up to 4.3 Billion years, so it’s useful in determining the age of the earth. There are other elements we can use as well that can help calibrate our radiometric dates so we can be more sure of the accuracy. When it comes to dating fossils it’s a matter of dating the rocks in which they formed using these methods. Does that help?

[@Thyalwaysseek]

@@SciencewithMrHarris How do they know that Potassium-40 takes 4.3 Billion years to decay? Who has measured it?

[@Thyalwaysseek]

@@SciencewithMrHarris Also Potassium-40 doesn't have a constant decay rate, decay rates can change due to increased cosmic radiation, temperature variations and other environmental materials surrounding it. Therefore the smallest change in decay rates could throw out the estimation of it's half life. I hope you don't think I am trying to be rude, I am as you say engaging in critical thinking which means to find flaw in a theory so I do appreciate you helping me to understand this dating method.

[@Thyalwaysseek]

Okay so from what I am researching about the isotope potassium-40 is that while it's decay rate is unstable it turns into argon 40 that has a decay rate that is stable. The problem is that means that there is no accurate way to date the half life of potassium-40 before it decays into argon-40.

[@SciencewithMrHarris]

@@Thyalwaysseek All good! I think what we need to focus on is the mosaic of information that we have available to us as scientists, rather than just one method. For example, K-Ar dating is just one geochronological technique we can use. Another is U-Pb dating for example. Also, we have other ways of indirectly measuring things like temperature and environmental conditions that can help to refine our models of radioactive decay. I would encourage you to look into oxygen isotopic ratios and how they can be used to estimate prehistoric temperatures, which can further calibrate our scale. Finally, you're right that half lives are not a constant, but rather a probabilistic estimate of how long it will take for atoms to decay. However, when we average them over trillions of atoms, they can give us a good estimate. All this to say that when we look at the information that is available to us from a variety of sources, scientists can generate a pretty good estimate of the age of the Earth. I hope this is helpful! I encourage you to continue with your research :)

[@Luna-yw7mq]

sooo...uh.. for the life to form..(bacterial life stuff) it sure does have something to do with all the asteriods and temparature eh?

[@CaspiRose99]

What about ages?

[@SciencewithMrHarris]

Ages are definitely a thing too! They are the smallest sub-division of geologic time. I left them out because in my experience they don't get talked about very much, but I could be wrong. Thanks for the comment!

[@FaadDMustapah]

That my teenagehood

[@Adash88]

I love things that go roar, but apparently that astroid didn’t :(

[@SciencewithMrHarris]

Haha true, the asteroid was not a fan

[@Adash88]

@@SciencewithMrHarris lmao 🤣

[@ilikeyou9778]

Part 2

[@trinelukiyt1317]

mvr ONGENA!!!!!!!!!!!!!!!!

[@whmeedalalaam2840]

bro it is 4.5 billion years old not 4.6 so teach correctly

[@SciencewithMrHarris]

🤔

[@mazzy.starry]

Who is here for school

[@sillykuango]

ME

[@kurisurisuku]

O

[@barhamqasm5938]

shayan did not like your video, because he was sleeping during the video.

[@SciencewithMrHarris]

Don't sleep in class shayan! 🚫💤

[@jpol3808]

So the oceans, h²o, water, were only h² until the farts came along.... And the dinosaurs had no vegetation for the herbivores to eat because vegetation came after them. You can go on and on in pointing out details that make no sense.... But I'm done. Later!

[@RachelDoesntknow]

Are you okay?

[@RachelDoesntknow]

Plant eaters came long after animal eaters. Early life was just eat or be eaten.

[@myschool2796]

Extremely boring and useless