The Caspian: Sea or Lake?

The Caspian is a big body of water that acts sometimes like a sea and sometimes like a lake.

Imagine you have a bathtub full of water. When the plug is in, it’s just your bathtub, a simple lake. But if you open the drain, water can flow out, like when you pour water from one bucket to another. The Caspian is kind of like that bathtub, but way bigger.

Sometimes the Caspian has a lot of water coming in from rivers and other places nearby, which makes it feel more like a sea because it's connected to other waters. But when there’s not as much water flowing in, or even some going out, it feels more like a lake, closed off on its own.

The Caspian is also connected to the Black Sea through a long, narrow path called the Caucasus. It's like having a big hose that lets water go from one place to another, sometimes full of flow, sometimes quiet and still.

So, the Caspian can be both a sea and a lake, depending on how much water it has and what’s happening around it, just like your bathtub can be both a lake and a sea too!