If your talking about oceans its called a Basin.
The Basin is the low part of the Earth.
This is sooo stu pid
A low area between mountains is called a valley.
It is called low air pressure or a low-pressure system. As air pressure decreases, it typically signifies unsettled weather conditions with the possibility of precipitation.
LPA.
A large mound or raised area of earth is called a hill or mound.
the orbit of the moon around planet earth
It is called a low earth orbit
The name given to a large area of level land on the Earth's surface is a plateau. A plateau also typically is elevated above the surrounding area. Such areas are also sometimes called tablelands.
plate
It is earth
Diffusion