SCIENCE CLASS #1- WHY Does Helium Make Your Voice Higher?

Live stream with demos your brain will enjoy where we answer a basic question every time.
Does farting make you weigh more or less?!?! Place your guess and give me feedback too-


  1. Mark Rober

    Mark Rober12 өдрийн өмнө


  2. Unicorn Butt face

    Unicorn Butt face11 өдрийн өмнө


  3. Érika Matteau

    Érika Matteau11 өдрийн өмнө


  4. Érika Matteau

    Érika Matteau11 өдрийн өмнө


  5. Érika Matteau

    Érika Matteau11 өдрийн өмнө


  6. Érika Matteau

    Érika Matteau11 өдрийн өмнө


  7. no one

    no one4 цагийн өмнө

    do you guys think mark ill be an easy marker as a teacher?

  8. ieatyomama

    ieatyomama9 цагийн өмнө

    ten minutes in still rambling. not sure what he is hopped up on. quality is really going downhill

  9. smarten your mind

    smarten your mind10 цагийн өмнө

    He would be the best teacher.


    PRO ROBLOXxX11 цагийн өмнө


  11. Electrofizz __

    Electrofizz __12 цагийн өмнө

    Schools close: Mark Rober: Allow me to introduce myself.

  12. Stefan Mashchits

    Stefan Mashchits15 цагийн өмнө

    C'mon public is not that bad.

  13. Erbium99

    Erbium9915 цагийн өмнө

    Sound doesn’t travel through air like waves travel through water. Sound waves are longitudinal waves while water waves are transverse. Im sure Mark knows that, it’s just diving deeper into something off topic and that takes up more time lol. But my nerdy self had to point that out.😅 Edit: yup he knows

  14. soupy

    soupy16 цагийн өмнө

    Last I checked 15+5=20 not 35

  15. Sharon

    Sharon16 цагийн өмнө

    I love this

  16. r@munya

    r@munya18 цагийн өмнө

    Air is a fluid! 🤯🙌

  17. Abdul Malik

    Abdul Malik23 цагийн өмнө

    Thanks Mark 👊🏽

  18. Christian Horner

    Christian Horner23 цагийн өмнө


  19. Jayden Tan

    Jayden TanӨдрийн өмнө

    This was the most interesting, entertaining Physics class I've ever been in

  20. Henry Wu

    Henry WuӨдрийн өмнө

    <a href="#" class="seekto" data-time="603">10:03</a> Oil is heavier than water??? I thought it's the opposite.

  21. Hannah Bloom

    Hannah BloomӨдрийн өмнө

    Mark please come teach at my school oh my god. We have like 3 physics teachers, all of whom I’ve heard a lot of complaints about. One does AP and honors and I failed out of her class because I never understood material when she taught it, the other two I don’t know personally, but many of my friends complain about the work and not understanding, and honestly I think most of us hate physics.

  22. Sydney Elmer

    Sydney ElmerӨдрийн өмнө

    Awee you have nothing to worry about with public speaking. You did amazing. Bonus: you kept me more engaged than my professors

  23. Benjamin Brassard

    Benjamin BrassardӨдрийн өмнө

    I’m watch videos on youtube 1,75 faster than normal and it’s fascinating how I can explain why the sound is more acute than at normal speed with what you explained.

  24. Sana Batol

    Sana BatolӨдрийн өмнө

    When you’re a bio major in college and your awesome 12 year old nephew (who also loves science) shares this video. Subscribe button hit ✅

  25. Isaiah Trujillo

    Isaiah TrujilloӨдрийн өмнө

    In case you didnt know, it was live

  26. Darren Tan AKA SubSamurott Neko

    Darren Tan AKA SubSamurott NekoӨдрийн өмнө

    Wish he was my actual teacher

  27. Shaun J

    Shaun JӨдрийн өмнө

    <a href="#" class="seekto" data-time="1048">17:28</a> “freedom units”? That’s a strange thing to call an Old English style of unit of length, as opposed to the kilometre that emerged from the French Revolution. :p

  28. Epic Playlists

    Epic PlaylistsӨдрийн өмнө

    Imagine Mark being your physics teacher, i feel that he would make any science class super interesting.

  29. Quinn Sams

    Quinn SamsӨдрийн өмнө

    Mark Rober Is A S.I.M.P.

  30. Mr Ruffins

    Mr RuffinsӨдрийн өмнө

    the magic did not work

  31. First Last

    First LastӨдрийн өмнө

    Hey mark where can I get that skeletor shirt.

  32. HCarota

    HCarotaӨдрийн өмнө

    you look nervous. That's cool, you get a like

  33. shrimp

    shrimpӨдрийн өмнө

    <a href="#" class="seekto" data-time="138">2:18</a> he went from a nasa man to a youtuber to a teacher

  34. mari uwu

    mari uwuӨдрийн өмнө

    I take more notes on this than in class

  35. Mj Vogt

    Mj VogtӨдрийн өмнө

    I am 11 and you are good at teching

  36. Danny Lin

    Danny LinӨдрийн өмнө

    First time ever doing a live show hey guys this is terrifying:)


    DJPEASCRAM 662 өдрийн өмнө

    Mark Rober or Mars Rover?

  38. Colton Gibson

    Colton Gibson2 өдрийн өмнө

    now everything i hear i over analyze lmao. i just called my friend to tell him and i kept thinking about the ringer

  39. Jayman Man

    Jayman Man2 өдрийн өмнө

    Just to explain how well he explains those psychics things: I am 13 and havent done this subject yet ,and I UNDERSTOOD IT english is my second languages,and I UNDERSTOOD IT

  40. Joshua Popov

    Joshua Popov2 өдрийн өмнө

    The Big Bang never happened

  41. nhi phan

    nhi phan2 өдрийн өмнө

    I would go back to whatever school he will teach and do attendance 100%

  42. Cassia Isabella

    Cassia Isabella2 өдрийн өмнө


  43. SammyBoi Is Best

    SammyBoi Is Best2 өдрийн өмнө

    Ok, but why does helium make you faint, if you inhale so much?

  44. _ PUNISHER _

    _ PUNISHER _2 өдрийн өмнө

    <a href="#" class="seekto" data-time="4">0:04</a> pause at that moment and think about what u have done

  45. Stacy Plotts

    Stacy Plotts2 өдрийн өмнө

    I see a solid foundation of a future teacher in the making!

  46. Tylersfar

    Tylersfar2 өдрийн өмнө

    I’m always going to watch this

  47. Savage League

    Savage League3 өдрийн өмнө

    Now this is what I call education all the science channels I watch have taught me more that I've ever learned in school

  48. L4W4ND

    L4W4ND3 өдрийн өмнө

    At <a href="#" class="seekto" data-time="187">3:07</a> listen to his voice

  49. Chloe Sanders

    Chloe Sanders3 өдрийн өмнө

    I don’t know why but the way he dresses, like with the hat and suit jacket thingy, reminds me so much of Cisco from Flash

  50. Rebecca Alexander

    Rebecca Alexander3 өдрийн өмнө

    The 1k who disliked this vid hate on of these: School Physics MNgos Life Science you see that I didn’t put Mark Rober. No one can hate him

  51. Rebecca Alexander

    Rebecca Alexander3 өдрийн өмнө

    I want you as my high school physics teacher

  52. rcvidu-

    rcvidu-3 өдрийн өмнө

    Best teacher we could have

  53. Ash

    Ash3 өдрийн өмнө

    I use SF6 for W etching in a nano fabrication cleanroom facility. Don't remember the MSDS saying is could be inhaled :)

  54. Liam Foster

    Liam Foster3 өдрийн өмнө

    this is AWESOME!!

  55. Austin Jackson

    Austin Jackson3 өдрийн өмнө

    Love the explanation of traveling sound. This is why there’s no sound in outer space!!

  56. Altidudes

    Altidudes3 өдрийн өмнө

    Are you still livestreaming?

  57. Terri Griffith

    Terri Griffith3 өдрийн өмнө

    As a middle school Science teacher. Got to say - love this! Thank you.

  58. David Cusack

    David Cusack3 өдрийн өмнө

    do why is water wet

  59. The Real Benjamin

    The Real Benjamin3 өдрийн өмнө

    Mark’s upload schedule before Coronavirus: Once a month Mark’s upload schedule now: Multiple videos in a month

  60. LifeAsANoun

    LifeAsANoun3 өдрийн өмнө

    Sooooo... I don't know about your conclusion. ◸ ◹ A test: *you'll need a highspeed camera and an airtight box filled with the different mediums* Tap a tuning fork within the medium. ◺ ◿ Look at how quickly the tuning fork vibrates in each medium. Get another trillion views. Sound travels faster in helium than in "air" (the mixture of [mostly] nitrogen and oxygen we normally breathe). The velocity (v) of a sound wave is equal to its wavelength (λ) multiplied by its frequency (f), v = fλ. The speed of sound in normal air is ~345 meters per second. In helium that speed is ~1007 meters per second, and ~134 meters per second for sulfur hexafluoride. My hypothesis: Your vocal cords aren't moving faster or slower -- the frequency of your vocal cords' motion stays the same -- the energy transmitted from the vibrating vocal cords is being applied to the different mediums. This changes the speed of the sound wave. By changing the medium (the atmosphere) a sound wave travels faster or slower. The frequency of the vocal cords' motion remains unchanged, but the speed the waves are carried away through the various mediums do. I love your work.

  61. Mombie Chronicles

    Mombie Chronicles3 өдрийн өмнө

    Great job Teach’

  62. Jeremy Hatch

    Jeremy Hatch4 өдрийн өмнө

    Mark:I am doing what i can Everyone: this is better than regular science class

  63. Daniel Middleton

    Daniel Middleton4 өдрийн өмнө

    That’s a Skelator shiirrrrrttt!!!!

  64. Kerry fyi

    Kerry fyi4 өдрийн өмнө

    Thanks Mark Rober, you're keeping me sane

  65. Matty k

    Matty k4 өдрийн өмнө

    farting does help you loose weight

  66. Dali Brabec

    Dali Brabec4 өдрийн өмнө

    the corona viris is stinky

  67. Rhiannyn Reynolds

    Rhiannyn Reynolds4 өдрийн өмнө

    i was NOT prepared for that giant air horn ....

  68. Jacinth

    Jacinth4 өдрийн өмнө

    You missed the opportunity to say 'ma in the chat' instead of 'F in the chat' because F=ma

  69. mrn. gr.

    mrn. gr.4 өдрийн өмнө

    <a href="#" class="seekto" data-time="80">1:20</a> 👌

  70. Rodney Bentley

    Rodney Bentley4 өдрийн өмнө

    I move that the Imperial Measuring System heretofore be renamed "Freedom Units"

  71. Shattering Diamond

    Shattering Diamond4 өдрийн өмнө

    He was so nervous and kept bringing up this is live.

  72. Crue Bundy Outdoors

    Crue Bundy Outdoors4 өдрийн өмнө

    come on mark give me a shout out pls

  73. Samuel Thompson

    Samuel Thompson4 өдрийн өмнө

    Insta-subbed. The presentation here is extraordinary.

  74. Jim hobbs

    Jim hobbs4 өдрийн өмнө

    This is a kind of back handed compliment, you come across so much better live, I used to find you a bit to cocky, but live you're humble self shines through.


    DYLAN PERRY4 өдрийн өмнө

    Who else thought that the first 5 seconds were in slow motion

  76. Samuel Simons

    Samuel Simons4 өдрийн өмнө

    I don't think God created the universe like that

  77. Raagul Suresh Babu

    Raagul Suresh Babu4 өдрийн өмнө

    Hey Mark can you make a video on the world's lightest solid

  78. Cristi Macovei

    Cristi Macovei4 өдрийн өмнө

    that's literally the best explanation i've ever heard keep up the good work my guy

  79. andrew calhoun

    andrew calhoun4 өдрийн өмнө

    I Show my teacher dis

  80. TysenTJF !

    TysenTJF !4 өдрийн өмнө

    I have always wanted a science teacher like you I am a middle schooler

  81. DJ 44455

    DJ 444554 өдрийн өмнө

    The next Eddie Woo

  82. DannyJ Fedora

    DannyJ Fedora4 өдрийн өмнө

    My science teacher put this on our online class. This is the first thing on this. This is the best science class ever.

  83. xX Galaxy Studios Xx

    xX Galaxy Studios Xx4 өдрийн өмнө

    I already watch Mr.Beast he is amazing

  84. Breanna Y

    Breanna Y5 өдрийн өмнө

    Why does your stomach growl and how can you hear the water in ur stomach when you exercise

  85. Jon Lon

    Jon Lon5 өдрийн өмнө

    When a pilot breaks the sound barrier does he/she hear the sonic boom? Also, while traveling faster than the speed of sound does a pilot hear sound from the jet engine?