Make an electroscope. Attach a strip of tissue paper folded in half to the end of the copper wire. Pierce the bottle cap with the other end of the wire. Insert the end of the wire with the strip of paper into the bottle so that the paper does not touch the sides and bottom. Screw on the cover. Check the operation of the electroscope. Describe the results.
When the charge is communicated to the electroscope, the leaves diverge in different directions.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.