Scuba tank

A scuba tank is like a big metal bottle that holds special air that scuba divers use to breathe when they go underwater. It's really important because humans can't breathe underwater like fish can!

So when a scuba diver wants to go explore the ocean or a lake, they strap on their scuba tank and attach a hose to a special mask they wear on their face. This hose connects the tank to the mask and allows the air to flow into their mouth and nose so they can breathe normally.

Inside the scuba tank, there's a lot of air that's been squeezed really tightly. This is called "compressed air" and it's different from the air we breathe on land because it has a lot more oxygen in it. This helps the scuba divers breathe comfortably underwater without feeling like they're running out of breath.

It's important for the scuba tank to be strong and sturdy because it has to hold a lot of air and be able to withstand water pressure as the diver goes deeper and deeper into the water. That's why scuba tanks are made out of tough metal materials like steel or aluminum.

So next time you see a scuba diver swimming around, think of the big metal bottle on their back that's helping them breathe underwater - that's their scuba tank!