What Causes Thunder?

Thunder is the loud noise you hear when lightning happens nearby.

When lightning strikes, it heats up the air around it really fast, like when you blow on a hot soup and it makes a whoosh sound. This super-hot air expands quickly, making a big wave of sound that travels to your ears as thunder.

Think about speaking into a megaphone: your voice gets louder and goes farther. Lightning is like that megaphone, it sends out a big sound that can be heard from far away, especially if you're in a quiet place like a bedroom or a park.

Sometimes the sound bounces off buildings, trees, or hills before reaching your ears. That’s why thunder can rumble and echo, just like when you shout into a canyon and hear your voice come back at you.

So next time you hear thunder, imagine it as a loud whisper from lightning, traveling through the air to say “Hello!”