Januari 19, 2017
want to see a really cool trick? watch this! i’ll take this balloon… ...rub it on my shirt… ... gently place it on the wall...and... …ta-dah! it sticks to the wall! thank you very much! this balloon-sticking trick might seem likemagic. but it’s not at all! the balloon sticks to the wall because of something calledstatic electricity… ...and static electricity isn’t magic...it’s science!
do you want to know how i made the balloonstick? let’s start by talking about opposites. i bet you already know some words that areopposites. like, the opposite of day is…that’s right,squeaks! night, and the opposite of up is…right again…! down. well, meet two new opposites! the names ofthese opposites are positive and negative. and they’re special because they attracteach other. that means that they pull on one another. if you’ve ever played with magnets, thenyou’ve already experienced things that attract. when i line up two magnets just so…theypull on, or attract each other. in fact, when
i move them even closer together, they attracteach other so much that they stick. …just like the balloon stuck to the wall! but i didn’t see any magnets on my balloon! and that’s because there aren’t any. the balloon, the wall, and everything elsein the universe is made of tiny little particles. these particles are way too small for us tosee. and some of these particles are positive,and some of these particles are negative. they’re opposites! and guess what? positive particles and negativeparticles attract each other...they pull on
each other just like the magnets did. let’s look at my balloon a little more closely. most of the time, there’s about the samenumber of positive and negative particles in any object you can think of … like myballoon … or my shirt. but when i rub the balloon on my shirt, theballoon takes some of the negative particles from the shirt. now the balloon has extra negative particles. and when there’s an imbalance of positiveand negative particles in things -- like when the balloon has more negative particles thanpositive ones -- it’s said to create static
electricity. and when i put the balloon next to the wall,those extra negative particles are attracted to the positive particles in the wall...andthe balloon sticks to the wall! at least for a while. any time two different things rub together,there’s a good chance that static electricity will form. static electricity is what makes your hairstick up when you take off a fuzzy sweater… ...and it also can give you a shock when youtouch something after walking across the carpet, like a doorknob, or another person!
so static electricity isn’t magic... it’sscience, which is also a lot of fun! thanks for joining me on scishow kids! doyou have a question about the world around you? get some help from a grown up, and letus know in the comments below, or send us an email at kids@scishow.com.
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