Chapter 10Science & Nature

How does lightning work?

Ice particles collide inside a storm cloud, separating positive and negative charges. When the voltage overcomes air's resistance, electricity discharges — up, down, or sideways. Thunder is the sound of air super-heated to 30,000 °C by the bolt expanding.

Follow-up questions

Why does thunder come after lightning?

Light is a million times faster than sound. Every 3 seconds of delay = about 1 km distance.

Is it safe indoors?

Yes, unless you're on a corded phone, in a bath, or touching plumbing.

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