What causes lightning, and how does it generate thunder?

Lightning is when electricity jumps between clouds or from clouds to the ground, and thunder happens because of that jump.

Clouds act like giant batteries, storing up energy as they move around in the sky. Inside a cloud, tiny bits called ice particles bump into each other, creating a kind of electric charge. Some parts of the cloud get positively charged, while others become negatively charged, just like when you rub your feet on the carpet and then touch a doorknob.

When the charges are strong enough, electricity zips through the air, making a bright flash we see as lightning.

Now, that same zap also makes the air around it heat up really fast. The air expands quickly, kind of like when you pop a balloon too fast, and that sudden movement pushes the air outward in a big wave.

We hear that wave as thunder, which is basically the sound of the air moving after lightning hits.

So, lightning happens because of charged clouds, and thunder comes from the hot air making a loud boom. It’s like when you shout across a room, your voice travels to the other side just like thunder travels through the sky!