Continental drift. It was later refined and is known nowadays as "Plate tectonics."
Continents cover about 29% of the Earth's surface area. The rest of the surface is predominantly ocean.
the earths plates shifted....
In great detail
Just under 30%
Approximately 30% of the Earth's surface is covered by land, the remaining 70% of the surface is covered by water.
The continents have moved, Volcanoes and mountains have made hige changes in the earths suface too.
One third is surface and the rest is the sea.
mostly water. There are some continents on there too though i believe.
the earth can be organized into 4 oceans, 7 seas, and 7 continents
The world is about 30% land and about 70% water
crust
Because earths crust is denser than the mantle