 Welcome back to Kids Fun Science. My name is Ken. Today's experiment is will your hands get wrinkly in the ocean? As always adult supervision is required. What you need for this experiment is either two cups or bowls salt and water. To set up this experiment, I'm just using regular house salt here and you're going to mix it in dissolve as much as you can into the water. So keep pouring a little in and stirring and you'll know when you get to the end where it won't dissolve anymore, but you want to do as much salt as possible for the first bowl. I'm using a couple pans, but cups anything you get your hand in and so I keep adding a little bit of salt checking it and I want to make sure that I have as much salt dissolved into this side that I'm going to end up using for my right hand for this experiment. So I keep doing that once you get it to the right mixture where it can't dissolve any more salt then you're going to pour it into either your cup or your pan. So take the salt side here just to let you know it's the salt poured into this one and then we're going to set up the other bowl and start our experiment. So so the second part is we're just taking regular tap water straight out of the sink no salt this time and mark that tap water so we know and I'm going to use this for my left hand. So I'm going to pour that in the second bowl or cup I found these to be pretty easy to put my hands in. You do have to have them in there for 20 minutes so pour that in and we'll get the experiment going. Okay, so we're going to this experiment we got regular tap water and we have salt water and I'm going to put my hands in for 20 minutes to see what the effect is. So the a little test today surprise test the good news bad news bad news is there's a surprise test which hand is going to wrinkle up the regular tap water or the salt water? The good news is it's a 50-50 chance and it's self-grading. All right, so I will start this off time it All right, so we're about five minutes a quarter of the way through the test I don't feel any difference or see anything going either way the salt water or the regular water I do the salt water does feel a tad colder Even though they both the water came out of the directly out of the tap Maybe the salt made a little bit colder, but otherwise Nothing different So we're a little bit halfway done now in the two waters So We're going to continue to go check back in about five minutes And then 10 minutes will be with the end results. All right So we're three quarters of the way done 15 minutes into the test Both hands are starting to feel about the same now And I've got five minutes left and we'll check back for the end results And we'll see what we come out of All right. Well, we're coming up to the end of the test here And I've been in for 20 minutes Right hand has been in the salt water mixture And the left hand has been in the tap water. So We are going to reveal the salt water first And you can see the right hand with the salt water It's not wrinkled at all as much right Um, overall it's red, but it's not wrinkled. But if we go to the left hand You can totally see, uh, how wrinkled up it is Um With the regular tap water So as you notice that the hand that gets wrinkled is by soaking it in fresh water This is just like being in the bathtub However, the hand that was soaking in salt water wasn't wrinkled at all Every cell in your skin of your hands contain a semi-permeable membrane Which allows some substances to enter the cell but not others Water can freely pass in and out of that cell of your skin Whether water passes in or out depends on the concentration of salt outside of the cells If your cells are surrounded by a solution that is greater concentrated of salt Water will pass from these cells to the outer solution in an attempt to equalize the concentration This passage of water through a semi-permeable Membrane is known as almosis. If the concentration of salt is greater within the cells then outside The water will move into the cells The water will always move into the direction of the greatest salt concentration in attempt to dilute it When we placed our hand to the tap water the solute concentration of the cells of your skin is greater than that of the tap water The cells that have a greater concentration of the dissolved solutes that the water surrounding them The cells that are hypertonomic to the surrounding solution As a result the water will flow into the cells in an attempt to equalize the concentrations. This makes your skin wrinkly However, the solute concentration of the salt water is greater than that of the solute concentration of your cells The cells have a lower concentration of dissolving solutes than the salt Solution surrounding them the cells are hypertonic to the surrounding solution in an attempt to equalize the concentrations Water will actually lead the cells of your skin making your skin feel a little tighter This is how bath salts work which prevents your skin from getting wrinkly as you soak in the tub So remember check your fingers the next time you're swimming the ocean I hope you enjoyed this video. Remember to click thumbs up and to subscribe. Thanks for watching