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 Rober7 ditë më parë


  2. Unicorn Butt face

    Unicorn Butt face6 ditë më parë


  3. Érika Matteau

    Érika Matteau6 ditë më parë


  4. Érika Matteau

    Érika Matteau6 ditë më parë


  5. Érika Matteau

    Érika Matteau6 ditë më parë


  6. Érika Matteau

    Érika Matteau6 ditë më parë


  7. Breanna Y

    Breanna YOrë më parë

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

  8. Jon Lon

    Jon LonOrë më parë

    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?

  9. Breanna Y

    Breanna Y2 orë më parë

    I have a question how does whistling work?

  10. Dirks The Immortal

    Dirks The Immortal2 orë më parë

    It Would be so cool to have mark rober as ur science teacher

  11. Mick dot com

    Mick dot com3 orë më parë


  12. Kaeden Dansereau

    Kaeden Dansereau3 orë më parë

    Mark why didn't the helium balloons float?

  13. Brennen Wright

    Brennen Wright5 orë më parë

    So, in a way does that mean that people with lower pitched voices just have "weaker" or "slower" vocal cords because they're moving air slower than the vocal cords of someone with a higher pitch voice? Or is this concept different when referring to just the regular voice of a person.

  14. Christopher Acosta Simon

    Christopher Acosta Simon9 orë më parë

    I would love to have Mark as my physics teacher.

  15. Christopher Acosta Simon

    Christopher Acosta Simon9 orë më parë

    Chalk drop *he drops the chalk which makes the first one collide with the second one and the second one drops to the ground* Chained reactioned chalk drop Science y'all

  16. Jon Deneen

    Jon Deneen10 orë më parë

    I think Mark needs to be teamed up with Elon Musk

  17. Jon Deneen

    Jon Deneen10 orë më parë

    I quote "From the drug world it's like uppers and downers" -T. McKenna

  18. taylor patton

    taylor patton11 orë më parë

    Oh that’s why your voice is lower in slow motion and higher when it’s sped up

  19. The Turtle Person

    The Turtle Person11 orë më parë

    Mark Rober: "Teaching High School physics is like my dream job" Also Mark: "I hate public speaking" Should we tell him?

  20. Joel

    Joel11 orë më parë

    I had the AH HA moment and I LOVED IT That’s so coooollllll

  21. Vghs. Go gxf. Games

    Vghs. Go gxf. Games12 orë më parë

    The Big Bang can’t actually happen

  22. Kris Kirby

    Kris Kirby12 orë më parë

    Thank you your videos are awesome and I enjoy watching your videos and look forward to them ( also when we started the space unit I got excited and taught the class about the part of the rover you built/helped build) keep going stay safe

  23. reesa beee

    reesa beee13 orë më parë

    cool bro... my daughter will be stocked up on science projects ..

  24. wy

    wy13 orë më parë

    you look so scared 🤣 I feel bad

  25. Desert Fresh

    Desert Fresh13 orë më parë

    Mark's such a great teacher. He even left the mouse on the screen while showing a video!

  26. v KEITH v

    v KEITH v13 orë më parë

    1<a href="#" class="seekto" data-time="301">05:1</a> like to dislike ratio... *everybody liked that*

  27. Damonion Katsby

    Damonion Katsby14 orë më parë

    Thank you so much for doing this you are awesome

  28. Max Ellis

    Max Ellis14 orë më parë

    Me and my family have been offering to buy our elderly next door neighbours their shopping.

  29. Sarah Chen

    Sarah Chen14 orë më parë

    If he was going to be a teacher I would really want to be in his class

  30. christian hirwa

    christian hirwa14 orë më parë

    this is better than my brain


    WOOGTSAR15 orë më parë

    For all of you who wanted him as his science teacher, there you go.

  32. ME PS3D

    ME PS3D15 orë më parë

    So he is going to be someone’s teacher I’m jealous

  33. f trouvé

    f trouvé15 orë më parë

    best teacher, thank you so much

  34. Tasia Hampton

    Tasia Hampton15 orë më parë

    You are genuinely the best person on AL-gos. No other channel compares to this one

  35. Tasia Hampton

    Tasia Hampton15 orë më parë

    Ok maybe except mr.beast

  36. Diaz055

    Diaz05515 orë më parë

    Learned more from this video than my hs class.

  37. H Carol

    H Carol15 orë më parë

    Thank you so much for doing these videos!!!

  38. Andy Hi

    Andy Hi16 orë më parë

    Anyone notice the red balloon slowly shrinks

  39. Davii5

    Davii516 orë më parë

    so this means that someone with low voice talks slower than someone with a high pitch voice because of physics??

  40. K-Tar

    K-Tar16 orë më parë

    Mark would be a perfect teacher because he forgets the mouse on the screen.

  41. Wiggle Wiggle Are Made of This

    Wiggle Wiggle Are Made of This16 orë më parë

    Oh, hi Mark! I like your humble approach to photosynthesis and biologic sciences in general, it says you know what's going on. To me the saying "knowing things takes the magic of it" seems like a missconception about a missconception. Compared to other fields (and always, with caution trying to make fair comparisons) advanced biology it's a very chaotic, emergent, integrative and with many no-answers field. Just the example about how an organism derivated from LUCA started using the energy from the sun in the most efficient way, invaded Pangea and became the most prolific organism on the entire planet, with complex mechanism and variability to reproduce itself wich involves a co-dependent evolution with other movil species such as animal kingdom, to end being the freaking plant ripping the water molecule and bringing oxygen we know from school. The more you know about specifics of photosyntesis, the more impressive it becomes (and the same goes to microbiology in general). I also appreciate your exposition about going live, you are going well. Congratulations about this initiative and keep it up.

  42. Nafhoon The Ninja

    Nafhoon The Ninja16 orë më parë

    Why is he looking under the camera Is he looking at words?

  43. Nafhoon The Ninja

    Nafhoon The Ninja17 orë më parë

    You make my life amazing

  44. Alejandro Jimenez

    Alejandro Jimenez17 orë më parë

    Wow i loved it 🤯

  45. Dr. Adam

    Dr. Adam18 orë më parë

    Mark- Ark and cause a spark... Me: ENGLISH CLASS PLUS SCIENCE!!!

  46. Dr. Adam

    Dr. Adam18 orë më parë

    Mark: 15 mins long Me- plus 20

  47. Hi Welcome

    Hi Welcome18 orë më parë

    When you inhale helium , you sound very weird on <a href="#" class="seekto" data-time="76">1:16</a>


    NAOMI STOLTZFUS18 orë më parë

    why are you not a teacher

  49. It'sCyan

    It'sCyan19 orë më parë

    You can tell Mark’s gonna make a fine teacher by the way he keeps the cursor on the screen while the video plays

  50. jeffero10

    jeffero1020 orë më parë

    Yo, mark rober can u like move to maryland and work at south river high so you can teach me 11th grade ap physics. :)

  51. Raman Sharma

    Raman Sharma21 orë më parë

    I'm your fan after today... not because of what you're doing (that's already established that you're amazing at what you do ) but because of seeing you getting emotional while speaking about punching Corona... it says a lot about your personality and how much you really love contributing for betterment of humanity. Namaste.

  52. This is Sammie Sue's World

    This is Sammie Sue's World21 orë më parë

    I'm 41, and love thank you!!!

  53. That Giant Fabric Parrot Perched on the window

    That Giant Fabric Parrot Perched on the window21 orë më parë

    I love how he’s doing that nervous sway thing that people do when they’re public speaking and it slowly disappears.

  54. The.Moss.Then.Is Cut

    The.Moss.Then.Is Cut23 orë më parë

    This is like a TEDx during social distancing. Doing your presentation speech solo. Cool!

  55. drewjosh

    drewjoshDitë më parë

    Mark Rober does workout in his physics class :P

  56. Fabio C.

    Fabio C.Ditë më parë

    <a href="#" class="seekto" data-time="1401">23:21</a> the heaviest balloon touched the ground first! This really surprised me. It took a few minutes to figure it out.

  57. Joseph Hayden

    Joseph HaydenDitë më parë

    When he said That "oil sinks and water sinks up" you notice he doesn't notice that he made a linguistic mistake.

  58. Nadav Rofe

    Nadav RofeDitë më parë


  59. Drake Mallard

    Drake MallardDitë më parë

    Mark, you are amazing and I love your enthusiasm and edited videos. Practice these lectures at least 3 times as many times as you have in front of a mirror, or take some improv classes. I am not trying to be discouraging, but its not about how many people are watching. It's about your confidence in the lecture you are presenting. The better you know exactly what you want to present and how, the better it will be received and absorbed.

  60. MR.Silver

    MR.SilverDitë më parë

    I'm a 13 year old and i watch your videos

  61. Stitches X

    Stitches XDitë më parë

    Replacement for school... I like it

  62. Grid Master

    Grid MasterDitë më parë

    I love this, I love how nervous he is. Makes him so much more human lol

  63. Mel J Easthope

    Mel J EasthopeDitë më parë

    This is perfect to watch even if you’re not a parent or a student!! 💙Mark!!

  64. Stop motion central

    Stop motion centralDitë më parë

    School teachers: aren’t being responsible and not giving us any work to do over the break Mark: I am now your teacher

  65. Hey that's Awesome

    Hey that's AwesomeDitë më parë

    Plz don't become a teacher make AL-gos videos

  66. GreatTehCatLover

    GreatTehCatLoverDitë më parë

    I literally saw this and said Ooo the first youtube based coronavirus class

  67. Alex Read

    Alex ReadDitë më parë

    Isn't the helium and sulfer hexifluoride less dense or more dense, not heavier or lighter?

  68. Jackson Poole

    Jackson PooleDitë më parë

    Thank you for not cussing makes my day. Keep up the good work your one of my favorite YT’ers

  69. jacks krunking

    jacks krunkingDitë më parë

    u wsanna know what makes your video good only uploading once a month ngl becuse its like a treat and you dont get boring for making weekly videos and losing the taste of ice cream

  70. Trevor Lee

    Trevor LeeDitë më parë

    i am 8 and i love your video

  71. A Slice of Life

    A Slice of LifeDitë më parë

    I really enjoyed this. Thank you for making it even though it made you scared to try.

  72. Kylo Ren?

    Kylo Ren?Ditë më parë

    Imagine having a million people in your science class

  73. Kate Ponslow

    Kate PonslowDitë më parë

    holy crap

  74. Peter Naugler

    Peter Naugler2 ditë më parë

    The frequency doesn’t change, the amplitudes on the harmonics are modulated so that you weight higher frequencies more (in the case of He).

  75. Jay Z

    Jay Z2 ditë më parë

    Who thought their screens were dirty at <a href="#" class="seekto" data-time="503">8:23</a>

  76. Blob Boy

    Blob Boy2 ditë më parë

    This is ridiculously cool and useless information that I can’t wait to tell my family.

  77. the specture specture

    the specture specture2 ditë më parë

    Maybe because helium is less dense than the air, so it always want to float up because the buoyancy force of the air is pushing it upwards. Hence the sound or the vibrated molecules from mouth will always move upwards and sometimes knocking with your vocal cords or the pinch or frequency is disturbed because it is moving upwards really fast which cause your voice deeper or higher.

  78. Evade Wisam

    Evade Wisam2 ditë më parë

    You don’t need to be nervous we all love Mr.Rober

  79. Shane Redmond

    Shane Redmond2 ditë më parë

    Screw bill nye we got Mark the science guy

  80. Shane Redmond

    Shane Redmond2 ditë më parë

    He said thru phone or computer. I'm watching this on my tv. And what about tablets

  81. -- _

    -- _2 ditë më parë

    He’s Bill Nye the Science Guy 2.0

  82. Dayton Coates

    Dayton Coates2 ditë më parë

    <a href="#" class="seekto" data-time="50">0:50</a> you sound like how people have their voices edited in crime documentaries to hide their identity

  83. this isn't my name

    this isn't my name2 ditë më parë

    He does lol

  84. Cavazos 22

    Cavazos 222 ditë më parë

    Quien más viene del sanpa? A ver este video

  85. Ronnie

    Ronnie2 ditë më parë

    Really wish you used a Shake-weight for the visual demonstration! 😆

  86. Nancy Cheein

    Nancy Cheein2 ditë më parë


  87. Henry Mealy

    Henry Mealy2 ditë më parë

    you would be the best teacher