 Today's experiment is walking water a very fun and easy experiment Hey, welcome back to kids fun science. My name is Ken and today We're gonna do a really easy and fun experiment walking water, right? So the water we're gonna make walk from one cup to another So I'm gonna go over what you need and the science behind it in just a second What you need for this experiment is scissors and paper towels I use bounty the quicker picker upper some color food coloring I got red yellow blue and red again, and then you need seven cups or glasses If you're gonna do the full experiment only three if you just want to do a partial experiment You're gonna fill every other glass so you can see that one's empty the middle one's empty And then that one's empty so three empty and four full try to fill them all the way to the top It really helps folding your paper towels. You fold it once like this And then you fold it a second time Press it down, and then you're gonna fold that in half once you have that there You're gonna fold it the long way in half, and then now it depends on the size glass You have if it fits you don't want it standing up too high, so and I fit it in the glass It was too high. I had to cut off just about an inch But everybody's experiments can be different and then when you put it in it should just be the tip of the glass The rim of the glass so now we're gonna put the colors in I start off with red I put five drops you could do as many as you want then I went to blue And then I went to yellow and then I finish up with another red There but as you notice I skip every other glass So there's three empty four full try to fill those water glasses all the way the top Then you're gonna stir up it make sure you drive the spoon off every time So you're not mixing the colors in between if you use the same stir So you can see I'm drying them off and then we will go from there So now the last step is gonna put the paper towels in and then the experiment will start So you put it in you can see the paper towels just go over the rim That's why I cut them and you just continue to put them in and look how fast the blues already going up And I'm gonna tell you the secret how that why that is and well how I got it to go up So quick as where if you see other videos out there They don't go as fast, but you can see they go very very quick here And I'm gonna explain that in just a bit it about when I explain the science behind it So you go all the way to the end and finish that up and I'll explain the science next So the science behind this is catapillary action effects involve two things surface tension and liquid itself So the contact of the angle of the liquid on a solid surface High surface tension means that the liquid is capable of climbing strongly to itself low contact angle means good wedding Right, so the surface by itself the liquid is Maximized effectiveness of the pole So this means high surface tension and low contact angle means high Catapillary action to draw up the paper towel now as for the temperature of the water Increases the surface tension of the water diminishes This makes it easier for the attractive forces between the water molecules and other surfaces in the vicinity of the pole of The catapillary action of the pores and the surface when they get wet to be able to pull it up quicker This is why hot water does a better job of rinsing dirt out of your clothes than cold water does it reduces the Contact angle between the water and the solid surfaces Enhancing the wet ability of those surfaces so note that you know, we do reduce the surface tension of the water We reduce the availability of the pole You know the force that it can expert or drag itself up a vertical surface against gravity So although the hot water Wets the surface better it cannot climb as far up the surface So the catapillary action draw goes down in response, but we have that paper towel so close That is actually not an effective on the gravity So here are the end results took a little under two hours to get to this point and keep let it go It'll continue to fill up, but it did make all the other colors like orange and purple and green Which is pretty impressive. So if you like this experiment, please remember to subscribe and like and And share. Thanks for watching