How does Lightning Form?

Lightning has intrigued folks for as long as it has been lighting up the sky. The sky fills with electric charges. When it is calm, it charges evenly, therefore it is neutrally charged. During thunderstorms, it is spread out differently and consists of ice crystals and hailstones. The ice crystals have a positive charge and the hailstones have a negative charge. The ice crystals are pushed to the top by updrafts and the stones go to the bottom by downdrafts. The earth has a positive charge, and since opposites attract, the negative charge wants to link to the positive charge of the surface of the earth. When the charge at the bottom gets large enough, it connects with the earth’s positive charge and the strong electrical current carries the charge upwards, and the electric current is called the return stroke and it is visible to the human eye. Look here for more information: