What are hollow domes?

A hollow dome is like a big ball that’s empty inside, just like your favorite toy ball, but it's used for something super cool!

Imagine you have a giant bubble made of strong material, like the shell of a turtle. This bubble doesn’t have anything inside, it’s hollow. When you put this bubble on top of a building or a structure, it becomes a dome, like the roof of a big round house.

Because they’re empty inside, hollow domes are really light and strong. Think about how your toy ball can roll across the floor without breaking, that’s because there's nothing inside to make it heavy or fragile. In the same way, a hollow dome helps buildings stay up high and strong without needing too much weight.

Some places, like the top of a stadium or a big church, use hollow domes so people can stand underneath them comfortably, just like how you sit under your favorite umbrella on a rainy day!