Okay kiddo, so you know how the earth is mostly covered by water, right? And some people want to understand how deep or shallow the oceans are in different parts of the world, so they create something called the General Bathymetric Chart of the Oceans.
Think of it like a giant map, but instead of showing roads and towns, it shows the shape of the ocean floors, the underwater mountains, valleys, and even the places where the water is super deep.
Scientists use special machines called sonars to create this map. They throw a device called a sonar into the water and it sends sound waves down to the ocean floor. When the sound waves hit something, they bounce back to the sonar, and the machine records how long it took for the sound to return. This helps scientists figure out how deep the water is in that area.
After collecting all the data, the scientists put it all together on a chart to make a picture of the ocean floors. This chart helps us learn more about the ocean and can be useful for many things like predicting tsunamis, studying marine life, and even finding new underwater resources such as oil or minerals.
So that's a general bathymetric chart of the oceans, a cool way for scientists to explore and learn about the deep, dark depths of the ocean floors.