ELI5: What causes thunder and lightning?

Imagine rubbing your socks on the carpet really fast. Sometimes, you get a little zap when you touch something metal, right? That's like a tiny bit of lightning!

Lightning happens because of big storms. Inside these storms, there are tiny bits of ice and water bumping into each other really fast.

Think of it like this:

• The storm cloud is like a big mixing machine.
• Ice and water are like sprinkles.
• When the sprinkles bump into each other, they swap tiny bits of stuff called electrons.

When enough of these electrons build up, they get really eager to jump to somewhere with the opposite charge (positive wants negative!). This jump is a giant spark of electricity - lightning! It can jump from one cloud to another, or from a cloud to the ground.

Now, when lightning zaps through the air, it makes the air around it super hot, really fast. Think of it like a tiny explosion!

This super-hot air suddenly expands (gets bigger) very quickly, pushing the air around it. This push creates a shock wave, like when you pop a balloon. This shock wave travels through the air to your ears. That's what we hear as thunder!

Because light travels faster than sound, we see the lightning before we hear the thunder. The farther away the storm, the longer it takes the sound to reach us. So, if you count the seconds between the lightning and the thunder, you can tell how far away the storm is!