Perimeter

📖 In short

The ocean is a huge body of salt water that covers more than two-thirds of the Earth's surface and holds most of our planet's water. There are five oceans: the Pacific, Atlantic, Indian, Arctic and Southern, and they're all connected.

🤩 Did you know?

The ocean covers more than 70% of the Earth's surface and holds 97% of its water.
The Pacific's average depth is about 3940 meters.
The deepest point in the Atlantic is near Puerto Rico, more than 8600 meters deep.
The deepest point in the Indian Ocean is in the Java Trench, about 7700 meters deep.

🔎 Find out more

🌟 The Pacific Ocean

The Pacific is the biggest and deepest ocean, bigger than all the land put together! It has the Mariana Trench, the deepest place in the world's oceans, about 11 kilometers deep.

🔍 Why is sea water salty?

Rivers carry small amounts of salts from rocks into the sea, and when sea water evaporates the salt stays behind, building up over millions of years.

💡 Life at every depth

A huge number of living things live in the ocean, from tiny plants to the giant blue whale. And in the dark depths there are strange fish that make their own light.

🎯 The ocean helps us

The ocean gives us food, makes a big share of the oxygen and controls the Earth's temperature. That's why we must not throw plastic or rubbish into it.