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.

  • Mark Rober
    Mark Rober

    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!

    • Venti

      If you were a science teacher I would enjoy it more, you make everything so interesting!

    • Aaron Bargotta
      Aaron Bargotta


    • gaming vids ✔
      gaming vids ✔


    • fatah habibi
      fatah habibi

      Nñ uu

    • Nora Faveur
      Nora Faveur

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

  • 039 friendtube
    039 friendtube


  • J M
    J M

    How to waterproof your hand hmm easy wear gloves class is over.

  • Jacob Asher
    Jacob Asher


  • Amjad Muhammad
    Amjad Muhammad

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

  • Shruti Vavilala
    Shruti Vavilala

    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

  • Aaron Bargotta
    Aaron Bargotta


  • Caesar Bro!
    Caesar Bro!

    I bet Bellarmine College Prep would hire you.

  • Lily Jesse
    Lily Jesse


  • Lily Jesse
    Lily Jesse

    Ummm hi

  • Diana Hampton
    Diana Hampton

    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.

  • Augusto N
    Augusto N

    Wear a glove

  • Wolf_ Master
    Wolf_ Master

    How water proof hand,use wax

  • DUCK Master
    DUCK Master

    thank for doing me a knowledge

  • RodrixQ

    This is better than real college

  • Glenn and Lillian
    Glenn and Lillian

    Why are you saying rover? it's rober.

  • 11_GM_A_33_Malaviya_Henil

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

  • Whatever Yousuck
    Whatever Yousuck

    Love it

  • GhostSixActual

    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.

  • Existence

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

  • Lena Jasmine
    Lena Jasmine

    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

  • 152 Srikar Yendluri
    152 Srikar Yendluri

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

  • Zach Rivera
    Zach Rivera

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

  • Mihai Ciudin
    Mihai Ciudin

    May you please create more SCIENCE CLASS videos

  • Ttv Mix
    Ttv Mix


  • Zoe Diakides
    Zoe Diakides

    I love this

  • Angel Jonguitud
    Angel Jonguitud


  • Hannah Hill
    Hannah Hill

    What’s the song at the very beginning

  • Adjusted Xbl
    Adjusted Xbl

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

  • Ezekiel Pineda
    Ezekiel Pineda

    5:08 counting with mark

  • Amrit Singh
    Amrit Singh

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

  • Mack S.L.
    Mack S.L.

    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!

  • Manyu V Reddy
    Manyu V Reddy

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

  • Jackson Shoemaker
    Jackson Shoemaker

    your wayy better than my science teacher lol

  • Daryl Ma
    Daryl Ma


  • KrishnanandaK

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

  • Smith Bob
    Smith Bob

    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

  • It's Anya Pandey
    It's Anya Pandey

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

  • Kaiser Wilhelm II
    Kaiser Wilhelm II

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

  • Flu1dz_


  • Fire Ant
    Fire Ant

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

  • Not Epic Stuffify
    Not Epic Stuffify

    how to handproof my water?

  • Vivian Niu
    Vivian Niu

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

  • Denyse Cassy
    Denyse Cassy

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

  • Yuh Yuh
    Yuh Yuh

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

  • Charlie Pledger
    Charlie Pledger

    Your the best. Nothing else to say

  • Hyein Clifton
    Hyein Clifton

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

  • Laura Biggs
    Laura Biggs

    I think 10

  • Lpaul

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

  • Joshy Greene
    Joshy Greene


  • Master OON
    Master OON

    Isnt your hand already kinda waterproof

  • Renee McGregor
    Renee McGregor

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

  • Virtual Blitz Gaming
    Virtual Blitz Gaming

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

  • Xvert_Sloppy

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

  • Leo Lyu
    Leo Lyu

    man i miss these

  • HappyPlays

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

  • yeeyeetpr1yam

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

  • Sir. EyeBat
    Sir. EyeBat


  • Kevin O'Reilly
    Kevin O'Reilly

    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??

  • Luka Kotur
    Luka Kotur


  • Jonny H
    Jonny H

    You sure that a virus has DNA?

  • DRS

    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.

  • Allen Bruntz
    Allen Bruntz




  • Rispiee

    Anyone heard of the flu

  • From noob To pro
    From noob To pro

    Lol his pointer is a car track

  • Nick Zamora
    Nick Zamora

    He always says "oi!"

  • Jalxys

    nobody: me: SOAP POWERED BOAT

  • sue Hull
    sue Hull

    I need talc hairspray for rainy days please.

  • Sandhya Mangari
    Sandhya Mangari


  • jufmi9

    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!

  • MrOrnald

    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

  • Robert Pazzini
    Robert Pazzini

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

  • Mais Mehl
    Mais Mehl

    What's with all the interlacing?

  • unbekannt unbekant
    unbekannt unbekant

    what is with arogel

  • minecraft dj Alex
    minecraft dj Alex

    oooo i miss a class wait teacher rober

  • Vlasta Khanova
    Vlasta Khanova

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

  • Lynn Clift
    Lynn Clift

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

  • Loopzy


  • Kayliegh's Korner
    Kayliegh's Korner

    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

  • Heather McD
    Heather McD

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

  • Buckie Smalls
    Buckie Smalls

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

  • oscar trevizo
    oscar trevizo

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

  • Michael Wyzkiewicz
    Michael Wyzkiewicz

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

  • Scarlette Ruelas
    Scarlette Ruelas

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

  • Ming Yi Quek
    Ming Yi Quek

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

  • A Sarandeses
    A Sarandeses

    I need this because of my hyperhidrosis 😂

  • Skech


  • F S
    F S

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

  • Lawrence Hart
    Lawrence Hart

    I hate school and I think this stuff is cool

  • The Graceyn And Maddy Show!
    The Graceyn And Maddy Show!

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


    What no way Really coollllllllllllll

  • Nikolaj Leithe
    Nikolaj Leithe

    Did enyone notice hes using a hot wheels track😂

  • Kim Otna
    Kim Otna


  • Matthew d
    Matthew d

    38 drops

  • Margaret Davies
    Margaret Davies

    Hi Mark you should do this again!

  • Jessica Greulich
    Jessica Greulich


  • Gamini Jayasuriya
    Gamini Jayasuriya

    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?

  • Ayham Ayham
    Ayham Ayham


  • Jack Grant
    Jack Grant

    I skipped actual science class for this