What causes thunder and lightning?
Sky's Throat-Clearing
What causes thunder and lightning?
Up in a tall, bruise-colored cloud, something is brewing. Not soup, not stew — electricity. By the end of this book, you'll know exactly why the sky sometimes flashes and grumbles like a giant clearing its throat.
It all starts with a busy traffic jam inside the cloud. Tiny bits of ice and water are zooming up and down, bumping and scraping against each other constantly. Every time they rub, they swap a little bit of electric charge — kind of like shuffling your socks across a carpet.
