Activity writing a simple switch

Vigyan make a simple switch by using a small sheet of thermocol to drawing pins safety pin and two pieces of wire this can be done as follows insert a drawing pin into the small ring at one end of safety pin and fix it one of the thermal sheet as shown in in make sure that the safety pin can be rotate freely around the fixed drawing pin also tied one end of a piece of wire around the drawing pin as shown now fix the second drawing pin on the thermocol sheet at such a distance from the first drawing that the tree and of safety pin can touch it when the safety pin is turned a piece of wire is also tired around the second drawing pin so now we have a safety pin to one end is fixed drawing pin and the other end of tree is turned so as to touch the second drawing paint when the safety pin arrange in this way is connected in circuit it behaves like a switch to open the circuit or closed the circuit as desired

The layer of air on earth is called atmosphere