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Rubbing Up Against Static Electricity
Transcript of Rubbing Up Against Static Electricity
By: Kennedi Heckstall
Blow up balloons
Tie knot on the balloon(s) to keep air from escaping
Rub balloon on a piece of wool
Count the number of times you rubbed the balloon on the wool (Record in notebook)
Count how many pieces of facial tissue you picked up
Repeat the experiment with the experimental groups, recording the data after each.
If a balloon is rubbed against a piece of wool, will it create static electricity?
This experiment began by blowing up balloon. It was quickly noticed that the balloons were already electrically charged because the tester's hair was sticking up. The working hypothesis of this experiment was the more rubs on the surface of a balloon,the more discharges of static electricity. The hypothesis was proved!!! It is true that wool and a balloon can pick up facial tissue.
If the water balloon is rubbed on a piece of wool, how many pieces of facial tissue will the balloon pick up?
4 Water Balloons
2 Pieces Of Facial Tissue
There are 115 different atoms, all made of protons and neutron in the nucleus and electrons orbits around the nucleus.
Protons carry a positive charge, neutrons carry a neutral charge and electrons carry a negative charge.
Electrons can move from the outer limits of one atom to the outer limits of another atom.
Opposite charges attract to each other.
Electrons move from the wool sweater to the balloon surface when rubbed. When a neutral hand is moved close to the balloon with the extra negative electrons, the extra electrons move to the atoms in the hand. The spark seen is the static electrical discharge that is created from when the build up of when the electrons move.
The independent variable in this experiment is the number of times the balloon is rubbed. This experiment tested independent variables of 10,20,30,and 40 rubs of a balloon against a piece of wool.
The dependent variable in this experiment is how many pieces of facial tissue will the balloon pick up after the balloon is rubbed against the sweater in each of category 10,20,30,and 40 rubs.
The controlled variables in the experiment are using the same piece of wool and the same type of balloons blown up with the same volumes of air. This will keep the surface volume of the balloon the in each of the number of rub groups.
This experiment began by blowing up the balloons. While blowing up the balloons the tester noticed that the balloons were already electrically charged because they wanted to stick to the tester’s hands. The balloons appeared similar in size after they were blown up, but there was no instrument used to measure the exact size of the balloons. The working hypothesis of this experiment was the more rubs on the surface of a balloon, the more discharges of static electricity. The hypothesis was proved, but the numbers of static electric discharges did not match up proportionally. Another observation made after the experiment was finished that effort need to be taken to apply the same amount of force in the rubbing of the balloon against the piece of wool. This was a variable was not identified before the experiment.
The hypothesis of this project is as stated: if a balloon is rubbed against a piece of wool 40 times it will create more static electricity than when a balloon is rubbed against a piece of wool less than 40 times. This hypothesis may be true because the greater the friction, the more electrons will be released and static electricity will be created.