Did You Know?
The keystone is shaped like a wedge!
How It Works
The keystone holds the arch tight.
Where You Find It
You can find keystones in old stone walls.
What keystone Does
It keeps the arch from falling.
It helps hold up the roof.
It makes the arch look nice.
It is strong and hard.
It is the last stone put in.
It helps keep the shape of the arch.
More About keystone
Keystones have been used for a long time. They help make strong arches in buildings. People used them in old times, too. They are still used today.
We see keystones in bridges and big doors. They help keep things safe. Without them, some things could fall down.
In the future, we will still need keystones. They help us build strong and safe places. They are very important for our world.







