Jean Baptiste Lamarck and others recognized that this nested, hierarchical pattern would be produce if organisms evolved from common ancestors. Systematics is the study of the diversity and relationship of organisms (how these organisms are named and classified is the discipline of taxonomy).
In addition to the visible flash that travels through the air, the current associated with the lightning discharge travels along the ground. Although some victims are struck directly by the main lightning stroke, many victims are struck as the current moves in and along the ground. â¢ If you can hear thunder, you are within 10 miles (16 kilometers) of a stormâand can be struck by lightning. Seek shelter and avoid situations in which you may be vulnerable.
Air is normally an insulator for electricity. But, as for any insulator, air also breaks down and allows electricity to flow when the voltage is sufficiently high. This breakdown voltage of dry air is about 30 lakh volts for a distance of about one metre (that is, an electric field of 3 million volts per metre). Lightning discharge comes from an average height of 7 km.