system
Given the following post, respond as if you're commenting on Reddit:
human
If all the rivers leading to oceans slowly wash dirt into the sea, will there eventually be no dry land?

Water evaporates, forms clouds, and then rains. Some of that rain evaporates again, but some of it will go into tributaries, streams, and rivers. Some of those will go into the sea. The water going into the sea washes dirt away with it. Will this process on a large enough time scale level out all the dry mass till the entire planet is encased in unbroken water?
gpt
Erosion is only half of the equation.  Mountains are also being slowly formed by the action of plate tectonics, driven by the heat of the earth's core.  Today's earth is in a near steady-state balance between erosion washing the continents away and plate tectonics pushing up new ground.  In the long term, when earth's core cools and plate tectonics cease, than it would be possible for erosion to gradually remove all the land masses.