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 Rober2 muaj më parë

    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. Anonymous

    Anonymous7 orë më parë

    little did we know, a friendship would be born during that filming. Mark and Phat Gus. (i assume it’s the squirrel video)

  3. Mihir Kagalkar

    Mihir Kagalkar15 ditë më parë

    14:30 Vitamin D does not contain fat it is fat soluble like Vitamin a , e and k (including d) except that the video rocks I love your way of explanation

  4. Betsy is awesome

    Betsy is awesome25 ditë më parë

    how are you so positive always

  5. Just F0ll0ws

    Just F0ll0wsMuaj më parë

    How many 'magnet' related answers did people give? - Have your paperclip surface tention sample set up on a table you can get under, use a magnet under the table to increase the downward pull on the clips creating enough downward pull to break the tension.

  6. Key’on Vlogs

    Key’on VlogsMuaj më parë

    NITMe2 V2 Actually 4th

  7. Doge dog

    Doge dogOrë më parë

    418 dislikes were the molecules who lost the tug-o-war... Jk

  8. Madden Nocash

    Madden Nocash12 orë më parë

    Bruh I wish you were my teacher

  9. Jordan Henry

    Jordan HenryDitë më parë

    I saw the commercial that you were in your crazy you were holding a flame thrower🤦🏻‍♂️

  10. Lil Tweet

    Lil TweetDitë më parë

    You’d be the best teacher!


    Yuvin SIRIWARDANADitë më parë


  12. Elliot Ma

    Elliot Ma3 ditë më parë

    60 drops of water

  13. Marcell Pullin

    Marcell Pullin3 ditë më parë

    Is that a hot wheels track pice at <a href="#" class="seekto" data-time="215">3:35</a>

  14. dt. daniellexx

    dt. daniellexx4 ditë më parë

    Now this is the science that tickles my senses

  15. MentoForKids

    MentoForKids4 ditë më parë

    I remember watching a “Mr. Wizard’s World” on Nickelodeon in the 90’s where he dusted the top of an aquarium filled with water and dropped a bolt in it. He reached for the bolt, and his hand was dry. Mind blown. Thank you for doing this because for the past 30 years, I’ve been wondering how he did that.

  16. HOLY POTATO Jack

    HOLY POTATO Jack4 ditë më parë

    Question: would the soapy foam boat work in salt or fresh water better? Please like so he can see

  17. M J

    M J4 ditë më parë

    I don’t know if you have ever heard of a summer camp called “mad science” but we did all kinds of stuff like this, soap and water, dry ice stuff, robotics, general learning about science, that the only reason I knew what plasma was, cause we had one of those plasma ball things so we could learn an electricity.

  18. Bujju Babbu

    Bujju Babbu5 ditë më parë

    I mean if you multiply the mass inertia with the average adults weight you can figure out the approximate result

  19. Elle Stern

    Elle Stern6 ditë më parë


  20. Elle Stern

    Elle Stern6 ditë më parë


  21. Elle Stern

    Elle Stern6 ditë më parë

    The water floats

  22. Elle Stern

    Elle Stern6 ditë më parë


  23. R3b3l Ray

    R3b3l Ray7 ditë më parë


  24. Aleksandar Gapkovski

    Aleksandar Gapkovski9 ditë më parë

    Definitely my favourite class

  25. tand more

    tand more9 ditë më parë


  26. omg it's me

    omg it's me9 ditë më parë

    He is really really good. I mean he is so smart and I love watching his videos.

  27. a A

    a A10 ditë më parë

    I bet my science teacher can't answer to a single of those questions like the way Mark Rober did. Like=you agree have a similar teacher like mine

  28. proNOTbuyer TO

    proNOTbuyer TO11 ditë më parë

    <a href="#" class="seekto" data-time="890">14:50</a> Bob Ross right there

  29. Kichu Playz edu

    Kichu Playz edu12 ditë më parë

    People who dislike mark rober is chinas space agency's alt accounts because he used to work at nasa

  30. Extended YT

    Extended YT12 ditë më parë

    I wish if you were my teacher my teacher sucks at teaching science :(

  31. Rajesh Elumalai

    Rajesh Elumalai13 ditë më parë

    more than 50 more than 60 61 62 63 64 65 drops

  32. Rishabh Chandra

    Rishabh Chandra15 ditë më parë

    <a href="#" class="seekto" data-time="870">14:30</a> - is this art or physics

  33. Geoffrey Willmoth

    Geoffrey Willmoth16 ditë më parë

    35to 40 is my guess mark

  34. Bas Rene

    Bas Rene17 ditë më parë

    Best science teacher ever

  35. tsunami beast

    tsunami beast17 ditë më parë

    Your hand is already waterproof

  36. Zachariah M. Baird

    Zachariah M. Baird18 ditë më parë

    Actually, Veritasium made a video about how trees work, and they don't use capillary action, they use negative pressure.

  37. The Fat Man

    The Fat Man21 ditë më parë

    don't use the same stuff used to waterproof your shoes as it will burn your skin with the chemicals used in the solution!

  38. 9P Pya

    9P Pya22 ditë më parë

    Coconut oil

  39. kirispine kousihaa

    kirispine kousihaa23 ditë më parë

    Your a much better physics teacher than ours

  40. Brennen Wright

    Brennen Wright23 ditë më parë

    So... should we drink soap to lose fat?😂😂

  41. Just_life J

    Just_life J24 ditë më parë

    Imagine disliking videos

  42. gummy bear

    gummy bear25 ditë më parë

    I love how u used a race car track for a pointer stick :D

  43. krsdog

    krsdog25 ditë më parë

    I am going to make an Edpuzzle with this! My 8th graders will love it AND it hits the learning goals.

  44. Porter T

    Porter T25 ditë më parë

    I really enjoy your videos, and I noticed some of your captions have minor errors and wanted to help adjust them so that people with hearing impairment can enjoy your videos and understand them accurately. For instance, at <a href="#" class="seekto" data-time="459">7:39</a> the caption reads ”it’s coming up to divine” but it should be “It’s becoming a tube of water”. I have created a list of other corrections if you are interested. Thanks, Porter (8th grade)

  45. Yannick Chasles

    Yannick Chasles25 ditë më parë

    For Diana question you can push with a fix force and look at the acceleration or with a fix acceleration and look for the force needed.

  46. Yannick Chasles

    Yannick Chasles25 ditë më parë

    Tree use negative pressure from watter evaporation to get the watter up.

  47. 2Thicc4You

    2Thicc4You26 ditë më parë

    I wish schools had a system where they had their normal curriculum but on a certain day like every Friday, all the teachers find a topic to teach using real world problems/phenomena, like how mark does his science classes, so for example, geography class or history class would talk about an embarrassing or funny/interesting moment is U.S or world history, or a crazy place that defies all logic, and is mysterious like the place called the devils hole or something like that that has a hole in the water like a waterfall in the middle of a lake for unknown reasons. It would help keep students interested and enjoy school more. I know I would.

  48. Fer Reaf

    Fer Reaf27 ditë më parë

    <a href="#" class="seekto" data-time="817">13:37</a> Man breaks city’s dam and ruins entire water supply

  49. Giuliana Butera

    Giuliana Butera27 ditë më parë

    Whenever I see you on a different channel I go like: OMG ITS HIM GUYS REEEEEEEEEEEEEEEEEEE

  50. Ari's little world

    Ari's little world27 ditë më parë

    you should still do this when covid is over

  51. Duck Butt

    Duck Butt28 ditë më parë

    How to waterproof your hands: Step 1: Wear a glove.

  52. Pranay mohla

    Pranay mohla29 ditë më parë

    Lol instead of a scale he used an hot wheel track <a href="#" class="seekto" data-time="220">3:40</a>

  53. Joemoe95 River hunter

    Joemoe95 River hunter29 ditë më parë

    I want to have you for a high school teacher

  54. bauerpower13

    bauerpower1329 ditë më parë

    My dream come truuuuuuuuuuuuuuuuuuuuuuuuu

  55. Samuel Ledesma

    Samuel LedesmaMuaj më parë

    18 drops of water on the penny

  56. Kalai Kumar

    Kalai KumarMuaj më parë

    How can I use it to stop my sweaty palm?

  57. Barry Lustgarten

    Barry LustgartenMuaj më parë

    good job

  58. CFTV Data

    CFTV DataMuaj më parë

    I wish you had been my high school science teacher, Mark... I would have paid much closer attention in class!

  59. Hyped Robloxian

    Hyped RobloxianMuaj më parë

    My kids, they RUN to the TV to turn on the show. They love what you're doing and they're learning a lot. I hope you're able to keep doing it for a while!

  60. MeguminUwU

    MeguminUwUMuaj më parë


  61. i b e a g y m n a s t animatesss

    i b e a g y m n a s t animatesssMuaj më parë


  62. Vadim

    VadimMuaj më parë

    So our isnt waterproof

  63. Pooplifes

    PooplifesMuaj më parë

    i have this for science class lol

  64. Hang Zhang

    Hang ZhangMuaj më parë


  65. Samit

    SamitMuaj më parë

    Maby a 50

  66. Samit

    SamitMuaj më parë

    Then why there is more pressure at bottom

  67. John Borja

    John BorjaMuaj më parë

    <a href="#" class="seekto" data-time="1285">21:25</a> batman

  68. eduardo aracena

    eduardo aracenaMuaj më parë

    multiplying the effects of gravity time how much they weighed in space

  69. Dr. Drift

    Dr. DriftMuaj më parë

    lol he is using a hot whee;s track

  70. Wesley Taylor

    Wesley TaylorMuaj më parë


  71. Taken Gaming

    Taken GamingMuaj më parë

    When you can't find a pointer.... *Well a Hot Wheels track works just as well.* 😂

  72. XavierProdz

    XavierProdzMuaj më parë

    so if i eat soap i’ll be fat free lol

  73. Kaps-Baha

    Kaps-BahaMuaj më parë

    does anybody else's family pull a simpsons and all hop on the at the same time because Mark Rober is live?

  74. Toad ya Boi 930

    Toad ya Boi 930Muaj më parë

    Notice mark is using a hot wheels track for his pointer

  75. Anthony Portillo

    Anthony PortilloMuaj më parë

    3 or 2

  76. Ponie Crazie

    Ponie CrazieMuaj më parë

    Does this experement work with dioderent.

  77. Claudeona_lesley

    Claudeona_lesleyMuaj më parë

    Normal teachers: uses a hand pointer or a stick Mark Rober: Uses an race car track 💀💀💀💀💀💀💀💀

  78. Isaac Dichard

    Isaac DichardMuaj më parë


  79. C M

    C MMuaj më parë


  80. Elizabeth Valentine

    Elizabeth ValentineMuaj më parë

    ya if your gonna be a physics teacher one day how about you do it in kentucky (mostly because i want u as my teacher)

  81. Sun Jason

    Sun JasonMuaj më parë

    @alexander patrick

  82. Peter White

    Peter WhiteMuaj më parë

    Can you build a jet engine or turbo jet engine please?



    Mark you are telling me that you want to be a high school physics teacher AS I AM GRADUATING HIGH SCHOOL I’m so jealous

  84. sitecap

    sitecapMuaj më parë

    Mark - my daughter and I love your videos - they are so great and educational. One small thing - the coronavirus SARS-CoV-2 is an RNA virus - it has no DNA. The RNA strand gets into the host cell and is transcribed into proteins that then replicate the virus. Blow this up so Mark can see it.

  85. Karl Stark

    Karl StarkMuaj më parë

    Weight = mass X gravity Mass= density x volume. So shrink wrap an astronaut to make a mold. Fill that mold with ketchup. Measure the amount of ketchup to give you volume. Use the average density of a person multipled by the volume you just pumped out of the shrink wrapped person to give you mass. Multiply that by gravity and BOOM! Your answer will probably be wrong. It is a trick question you just use a cosmic scale.