They are answered in later lessons. OK, now let's learn something. One of the biggest complaints that people have about static electricity is that it causes sparks or gives them mild shocks when they touch things or even other people. Most people experience this problem once in a while in the winter, but there are others who are actually plagued by the problem and are constantly getting shocks. Man lives in Kansas and gets shocks all the time during winter, even when in bed.
Girl gets shocks after jumping on a trampoline.
Boy constantly gets shocks when walking in the house. The common factors in all of these cases point to dry air and materials that rub against each other to build up the static electricity. The way to reduce the problem of excess static electricity is to try to get more humidity in the air, change the materials or modify their surface, and ground yourself before touching things, whenever possible. Static electricity is more active when the air and materials are dry. The humidity is normally lower in the winter, and heating the house further reduces the humidity.