#science #experiment #static Kids Science Experiment | Static Electricity using balloon Part2 simple science Experiment for kids Key concepts Electricity Electronics Insulators Conductors Have you ever wondered why rubbing a balloon or a blanket—or even a winter hat—on your head makes your hair stand up? The effect is due to static electricity, but how is the static electricity made, and why does it make your hair stand on end? Static electricity is the buildup of electrical charge in an object. Sometimes static electricity can suddenly discharge, such as when a bolt of lightning flashes through the sky. Other times, static electricity can cause objects to cling to one another. Think of how socks fresh out of the dryer stick together. This happens when objects have opposite charges, positive and negative, which attract. (Objects with the same charges repel one another.) Procedure • Hold the balloon in a way that your hand covers as little of its surface area as possible, such as by using only your thumb and pointer finger or by gripping the balloon by its neck where it is tied off. • Rub the balloon on the woolly object once, in one direction. • Hold the balloon up on the wall with the side that was rubbed against the wool facing the wall, then release it. Does the balloon stay stuck on the wall? If the balloon stays stuck, have your partner immediately start the stopwatch to time how long the balloon remains bound to the wall. If the balloon does not stick, move to the next step. • Touch the balloon to a metal object. Why do you think this is important to do? • Repeat the above process but each time increase the number of times you rub the balloon on the woolly object. Rub the balloon in the same direction each time. (Do not rub the balloon back and forth.) How many rubs does it take to make the balloon stick to the wall for a few seconds? What about multiple minutes? • You can repeat this whole process two more times. Do your observations for each trial match with the previous trials? • Extra: Does rubbing in one direction give a different result than rubbing back and forth? Try comparing the same number of rubs in one direction with those done back and forth. Does one stay on the wall longer than the other? • Extra: Try comparing the effectiveness of different materials for producing a static charge. Does rubbing wool work better than rubbing silk? Design an experiment to test several different materials: silk, wool, nylon, polyester, plastic, metal, etcetera. ... https://www.youtube.com/watch?v=Aahnx6vBzzk

... https://www.youtube.com/watch?v=XL5P-oJgD6c

... https://www.youtube.com/watch?v=BMLOuDeFeso

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