The semiconductor has higher resistance and insulators have so high resistance, that electric flow through them is not possible. Everybody from as has already experienced the static electricity in the form of a slight electric shock. An example is when you walk across a rug on a dry day. Contact between your feet and rug causes transfer of electrons from your body to the rug, charging your body positively. Than when you touch the doorknob or any metal, electrons from this object jump to your body giving you a slight shock.
Scientists believe that raindrops in the winds of clouds form up electric charge.
Parts of the clouds become than positively charged, while other parts become negatively charged. Electric spark we call lightning than jumps between differently charged parts of clouds. In our body electrical signals travel along nerves carrying information from and to the brain. Electrical impulses from the brain tell our muscles to move, our heart to beat, lungs to breathe. Our whole body is controlled by our brain this way.