Lightning formation involves which of the following processes?

Lightning formation involves which of the following processes?

• A. A flash of light travels from ground to cloud
• B. The storm's temperature drops rapidly
• C. A step leader from the cloud connects to earth
• D. The air becomes completely ionized instantly

Answer: (C)

Lightning happens when a storm cloud cannot hold all the built-up electric charge, creating a very strong electric field in the air. This field starts to ionize the air along narrow paths, turning them into a temporary conductor. The process begins with step leaders—thin, branched channels that form downward from the cloud in steps. When these leaders get close to the ground, tall objects or the ground itself can send up a connecting streamer. Once a connection forms between the cloud-side path and a ground-side streamer, a complete conductive channel is established. A rapid discharge then travels along that channel, known as the return stroke, which is what we see as the bright flash. The idea that the air becomes completely ionized instantly isn’t accurate—the ionization builds up along a developing path, not all at once. And the notion that the temperature of the storm drops rapidly isn’t what drives lightning. Also, lightning doesn’t start with a flash traveling from ground to cloud; the initial breakdown and channel formation progress from the cloud toward the ground, then a discharge travels along the completed path.

Lightning happens when a storm cloud cannot hold all the built-up electric charge, creating a very strong electric field in the air. This field starts to ionize the air along narrow paths, turning them into a temporary conductor. The process begins with step leaders—thin, branched channels that form downward from the cloud in steps. When these leaders get close to the ground, tall objects or the ground itself can send up a connecting streamer. Once a connection forms between the cloud-side path and a ground-side streamer, a complete conductive channel is established.

A rapid discharge then travels along that channel, known as the return stroke, which is what we see as the bright flash. The idea that the air becomes completely ionized instantly isn’t accurate—the ionization builds up along a developing path, not all at once. And the notion that the temperature of the storm drops rapidly isn’t what drives lightning. Also, lightning doesn’t start with a flash traveling from ground to cloud; the initial breakdown and channel formation progress from the cloud toward the ground, then a discharge travels along the completed path.