The earths surface is split into tectonic plates, the boundaries are called fault lines which is where volcanies emerge and mountains are created
Boundaries on Earth's surface are called geographic boundaries. These boundaries can be natural, such as mountains, rivers, and Coastlines, or they can be artificial, such as borders between countries or states. Geographic boundaries help define territories, separate landforms, and demarcate political jurisdictions.
Near plate boundaries.
Plate boundaries.
At convergent boundaries some mantle material can melt and rise through the crust, forming volcanoes.
Height above earths surface is called elevation
Subsidence.
It is called the crust.
Projection
Magma once it reaches the earths surface is called lava.
Convection currents beneath the tectonic plates of the crustal surface of the earth provide heat from the core in circular motions, and make plate boundaries move together from compressional forces at convergent boundaries, apart from tensional forces at divergent boundaries, and side by side from shear force at transform boundaries.
There is no such thing as half of the Earth. If you are referring to half of the spherical shape of the Earth then it will be a hemisphere.
Yes
meteoroid