SCIENCE CLASS #4- How to Waterproof Your Hand

Lots of juicy demos relating to surface tension! NO CLASS THIS WEDS!! I'm filming one of my normal monthly videos that day. Back on Friday though!!

Go check out Dianna's awesome channel-

CHALLENGE- float as many paper clips as you can and then come up with a creative way to ruin the surface tension and have them all sink. Tag me on any social media with your responses.

Question for next time- How do astronauts weigh themselves when they are floating and weightless.


  1. Mark Rober

    Mark RoberPred letom

    Thanks for attending! Remember, no class on Weds because I'm filming a normal vid but we'll be back on Friday with a super juicy one!

  2. Aaron Bargotta

    Aaron BargottaPred 18 dnevi


  3. gaming vids ✔

    gaming vids ✔Pred mesecem


  4. fatah habibi

    fatah habibiPred 4 meseci

    Nñ uu

  5. Nora Faveur

    Nora FaveurPred 4 meseci

    Please differentiate between the types of engineering. I don't know what to choose

  6. Nora Faveur

    Nora FaveurPred 4 meseci

    Most positive SLthrowr

  7. Jacob Asher

    Jacob AsherPred dnevom


  8. Amjad Muhammad

    Amjad MuhammadPred 8 dnevi

    If Mark Rober was my physics teacher !!!!.

  9. Shruti Vavilala

    Shruti VavilalaPred 13 dnevi

    1. 23? 2. Water goes up and sidewayscuz there’s no gravity? 3. Also for the pepper experiment I used milk so you can se it better

  10. Aaron Bargotta

    Aaron BargottaPred 18 dnevi


  11. Caesar Bro!

    Caesar Bro!Pred 20 dnevi

    I bet Bellarmine College Prep would hire you.

  12. Lily Jesse

    Lily JessePred 20 dnevi


  13. Lily Jesse

    Lily JessePred 20 dnevi

    Ummm hi

  14. Diana Hampton

    Diana HamptonPred 22 dnevi

    Mark, your videos are fantastic thank you. You did leave out an important factor with water going up the trees: transpiration. The evaporation of the water out the pores of the leaves creates a pull like sucking on a straw and pulling the water out of the tree. Cohesion and adhesion assist in this, but will not alone cause the water to climb high enough, it’s the pull from the top, the tension at the top working with the two forces That causes the upward movement of water. You probably already know this but I thought it was important point to share. Thanks again for your inspiring work.

  15. Augusto N

    Augusto NPred 23 dnevi

    Wear a glove

  16. Wolf_ Master

    Wolf_ MasterPred 25 dnevi

    How water proof hand,use wax

  17. DUCK Master

    DUCK MasterPred 26 dnevi

    thank for doing me a knowledge

  18. RodrixQ

    RodrixQPred 27 dnevi

    This is better than real college

  19. It's Gacha Mocha

    It's Gacha MochaPred 28 dnevi

    Why are you saying rover? it's rober.

  20. 11_GM_A_33_Malaviya_Henil

    11_GM_A_33_Malaviya_HenilPred 29 dnevi

    He Is better than my School :D edit: I mean a lot lot lot better

  21. Whatever Yousuck

    Whatever YousuckPred 29 dnevi

    Love it

  22. GhostSixActual

    GhostSixActualPred mesecem

    For what it's worth: I think you'd be a great high school science teacher but I think your skills, personality and passion would be of a greater value outside of the constraints of our standard education systems. Please continue to educate hundreds of thousands of children AND adults by making videos online or via a similar medium. Spend your time there instead of in a standard classroom.

  23. StealthyBoi

    StealthyBoiPred mesecem

    The rona: 0/10 Mark's teaching skills: 10/10

  24. Lena Jasmine

    Lena JasminePred mesecem

    I don't get why people gave this a 'thumps down': if you don't want to know how to water proof your hand, JUST DON'T CLICK ON THE VIDEO

  25. 152 Srikar Yendluri

    152 Srikar YendluriPred mesecem

    3:40 wow teachers should use these hotwheels tracks to teach

  26. Zach Rivera

    Zach RiveraPred mesecem

    I literally said 39 for the penny thing. We did this in school a year ago.

  27. Mihai Ciudin

    Mihai CiudinPred mesecem

    May you please create more SCIENCE CLASS videos

  28. Ttv Mix

    Ttv MixPred 2 meseci


  29. Zoe Diakides

    Zoe DiakidesPred 2 meseci

    I love this

  30. Angel Jonguitud

    Angel JonguitudPred 2 meseci


  31. Hannah Hill

    Hannah HillPred 2 meseci

    What’s the song at the very beginning

  32. Adjusted Xbl

    Adjusted XblPred 2 meseci

    I just found a new way to waterproof your hand...............CUT IT OFF

  33. Ezekiel Pineda

    Ezekiel PinedaPred 2 meseci

    5:08 counting with mark

  34. Amrit Singh

    Amrit SinghPred 2 meseci

    I have a question. Does cohesion and adhesion occur in substances other than water?

  35. Mack S.L.

    Mack S.L.Pred 2 meseci

    Absolutely love this, would totally have liked science if you were my teacher when I was in high school or even college! Would love to see better lighting though, it’s so dark compared to your regular videos. Congrats on all your success, your truly an inspiration to learn and grow, and of corse to catch sticky fingered morons who steal packages!

  36. Manyu V Reddy

    Manyu V ReddyPred 2 meseci

    they might use ropes to create the exact pull like the one that earths gravity puts to weigh themselves in space

  37. Jackson Shoemaker

    Jackson ShoemakerPred 2 meseci

    your wayy better than my science teacher lol

  38. Daryl Ma

    Daryl MaPred 2 meseci


  39. KrishnanandaK

    KrishnanandaKPred 2 meseci

    Wait if you water proof your hands does it not let the germs get on our hands?

  40. Smith Bob

    Smith BobPred 2 meseci

    Mark some years ago:I wanna quit working for NASA and be a youtuber Mark today:I wanna be a science teacher some day Me: It's evolving just backwards

  41. It's Anya Pandey

    It's Anya PandeyPred 3 meseci

    I literally have never seen such an interesting live stream .The live classes were really informative . Thank you so much Mark !🐶

  42. Kaiser Wilhelm II

    Kaiser Wilhelm IIPred 3 meseci

    going to the comment section is the equivalent of talking to your friends when the teacher is explaining something

  43. inked

    inkedPred 3 meseci


  44. Fire Ant

    Fire AntPred 3 meseci

    I think they could weight them self by spinning to make artificial gravity then try to match earths gravity

  45. Not Epic Stuffify

    Not Epic StuffifyPred 3 meseci

    how to handproof my water?

  46. Vivian Niu

    Vivian NiuPred 3 meseci

    me trying to figure out how to be waterproof to swim faster: hmmmmmmmmm *covers self in baby powder and goes to swim practice*

  47. Denyse Cassy

    Denyse CassyPred 3 meseci

    The absorbed pond surgically rescue because banjo undesirably request qua a blue water. funny, inquisitive duckling

  48. Yuh Yuh

    Yuh YuhPred 3 meseci

    Sometimes when I am home alone I put oil on my body and slide around my house as if I am a snail 😅✋🏻

  49. Charlie Pledger

    Charlie PledgerPred 3 meseci

    Your the best. Nothing else to say

  50. Hyein Clifton

    Hyein CliftonPred 3 meseci

    Trees use adhesion to suck up the water rom the rain like the paper towel.

  51. Laura Biggs

    Laura BiggsPred 3 meseci

    I think 10

  52. Lpaul

    LpaulPred 3 meseci

    The kids that get you as a teacher are going to be pretty lucky.

  53. Joshy Greene

    Joshy GreenePred 3 meseci


  54. Master OON

    Master OONPred 4 meseci

    Isnt your hand already kinda waterproof

  55. Renee McGregor

    Renee McGregorPred 4 meseci

    You're gonna be an Amazing Teacher, coz you already are!

  56. Virtual Blitz Gaming

    Virtual Blitz GamingPred 4 meseci

    You would be an amazing teacher when you do decide to teach

  57. Xvert_Sloppy

    Xvert_SloppyPred 4 meseci

    i did this experiment in 6th grade, I think i got like 102

  58. Leo Lyu

    Leo LyuPred 4 meseci

    man i miss these

  59. HappyPlays

    HappyPlaysPred 4 meseci

    i just realized that mark wears the same hat in every video

  60. yeeyeetpr1yam

    yeeyeetpr1yamPred 4 meseci

    Anyone notice at 3:49 that he used a hot wheels track to point at the mug lol

  61. Trex tex

    Trex texPred 4 meseci


  62. Kevin O'Reilly

    Kevin O'ReillyPred 4 meseci

    Question: i broke several bones in my hand and had reconstructive surgery, there was massive swelling. When i started PT i noticed that the skin on my hand was ultra water proof like teflon. Its been this way for months now. Do you know why??

  63. Luka Kotur

    Luka KoturPred 4 meseci


  64. Jonny H

    Jonny HPred 4 meseci

    You sure that a virus has DNA?

  65. DRS

    DRSPred 4 meseci

    My uncle used to put soap in the water tank where the cows drank to keep the ducks out of the tank. It broke the surface tension. The ducks would sink so they stayed out. I guess it was better for the cows to drink a little soap than duck crap. We also put soap on the hill in our front lawn. We had a lot of clay in the soil. The water would run off. The soap broke the surface tension and allowed the water to soak in.

  66. Allen Bruntz

    Allen BruntzPred 4 meseci


  67. BH4VIK

    BH4VIKPred 4 meseci


  68. Rispiee

    RispieePred 4 meseci

    Anyone heard of the flu

  69. From noob To pro

    From noob To proPred 4 meseci

    Lol his pointer is a car track

  70. Nick Zamora

    Nick ZamoraPred 4 meseci

    He always says "oi!"

  71. Jalxys

    JalxysPred 4 meseci

    nobody: me: SOAP POWERED BOAT

  72. sue Hull

    sue HullPred 4 meseci

    I need talc hairspray for rainy days please.

  73. Sandhya Mangari

    Sandhya MangariPred 4 meseci


  74. jufmi9

    jufmi9Pred 4 meseci

    I just want to say that the way you teach is in my opinion the best way to go about it. For me at least, I learn and memories subjects the best when I get a mental model, only then do I feel like I fully understand it, which is exactly what you do. So if this is how you want to teach at schools, your students are going to love you. You'll be THE mister Rober from school, not just that famous guy from the internet (at least, that's how it worked at my school, the best teachers get school-wide recognition). Good luck!

  75. MrOrnald

    MrOrnaldPred 4 meseci

    I like your videos but this time it is too chaotic. You clearly didn’t have idea how to explain all of this information and you tried to improvise it a bit. It failed but don’t stop. I believe you will make progress as a “teacher” and your future videos will be much smoother

  76. Robert Pazzini

    Robert PazziniPred 5 meseci

    The paper clips didn't sink a bit bc of Archimedes and displacement.

  77. Mais Mehl

    Mais MehlPred 5 meseci

    What's with all the interlacing?

  78. unbekannt unbekant

    unbekannt unbekantPred 5 meseci

    what is with arogel

  79. minecraft dj Alex

    minecraft dj AlexPred 5 meseci

    oooo i miss a class wait teacher rober

  80. shel0650 shel0650

    shel0650 shel0650Pred 5 meseci

    Dude I love u but you could just your hand in Vaseline and wambam thank you Mamma you got a water proof hand

  81. Vlasta Khanova

    Vlasta KhanovaPred 5 meseci

    I think astronauts way themselves down near earth where gravity is normal and way themselves but not all the way

  82. Lynn Clift

    Lynn CliftPred 5 meseci

    Me: gets a real boat and 10 buckets of soap 🚣‍♀️🚣‍♀️🚣‍♀️🚣‍♀️🚣‍♀️🚣‍♀️🚣‍♀️🚣‍♀️

  83. Loopzy

    LoopzyPred 5 meseci


  84. Kayliegh's Korner

    Kayliegh's KornerPred 5 meseci

    I think that maybe you can put ummmm (thinks of first number in mind) 15 drops of water on a penny also I love your vids

  85. Heather McD

    Heather McDPred 5 meseci

    What was the stuff the guy in the pool was covered in that stopped him from getting wet

  86. Buckie Smalls

    Buckie SmallsPred 5 meseci

    Soap breaks down fat.. Yet fat is used to make soap.. Talk about washing the hand that feeds you.

  87. oscar trevizo

    oscar trevizoPred 5 meseci

    Can't I just watch Mark Rober instead of doing zoom

  88. Michael Wyzkiewicz

    Michael WyzkiewiczPred 5 meseci

    Can't you just cut up a banana and rub it on your shoe and it will make it water proof

  89. Scarlette Ruelas

    Scarlette RuelasPred 6 meseci

    I’m a kid so hopefully I get u as my teacher in high school

  90. Ming Yi Quek

    Ming Yi QuekPred 6 meseci

    i'm pretty certain that tall trees draw water up by mainly transpiration pull, not adhesion/ capillary action

  91. A Sarandeses

    A SarandesesPred 6 meseci

    I need this because of my hyperhidrosis 😂

  92. Warp Cobra

    Warp CobraPred 6 meseci


  93. F S

    F SPred 6 meseci

    This is fun. It's like see my science teacher in junior high school but without the cool presentation.

  94. Lawrence Hart

    Lawrence HartPred 6 meseci

    I hate school and I think this stuff is cool

  95. The Graceyn And Maddy Show!

    The Graceyn And Maddy Show!Pred 6 meseci

    Now this is a mug of water Also him he is using a hot wheels track to point to it I love your videos ❤️


    ARS VLOGSPred 6 meseci

    What no way Really coollllllllllllll

  97. Nikolaj Leithe

    Nikolaj LeithePred 6 meseci

    Did enyone notice hes using a hot wheels track😂

  98. Kim Otna

    Kim OtnaPred 6 meseci


  99. Matthew d

    Matthew dPred 6 meseci

    38 drops

  100. Margaret Davies

    Margaret DaviesPred 6 meseci

    Hi Mark you should do this again!

  101. Jessica Greulich

    Jessica GreulichPred 6 meseci


  102. Gamini Jayasuriya

    Gamini JayasuriyaPred 6 meseci

    Mark so does this mean that if I jump off a bridge into a river I’d have a better chance of surviving if I’m soaked in soap?

  103. Ayham Ayham

    Ayham AyhamPred 6 meseci


  104. Jack Grant

    Jack GrantPred 6 meseci

    I skipped actual science class for this

  105. Subscribe Lol

    Subscribe LolPred 6 meseci

    1:40 Lol