They are a teaching aid for showing students how the various planets revolve and rotate. With an Earth/Moon/Sun system model you can answer all these questions by just turning the handle.. 1  Why we have day and night.  What a year is.
1. Static electricity is caused by the build up of electrical charges on the surface of objects, while current electricity is a phenomenon from the flow of electrons along a conductor. 2. When objects are rubbed, a loss and/or gain of electrons occurs, which results in the phenomenon of static electricity.
There is another kind of energy known as static energy or static electricity that many people tend to confuse because of the word static and think of it as being opposite to kinetic energy which is the result of movement of the object. However, it is not so and the confusion will be removed once the article is complete.