Assuming you are referring to a representation of the earth then it would be a map.
A map.
A map is a flat drawing that shows all or parts of earth surface.
A map represents all parts of the Earth's surface on a flat piece of paper. Maps use projections to depict the curved Earth's surface on a 2-dimensional plane.
The visible outside part of the Sun can be said to be its surface. But the Sun doesn't have a solid surface on which you might stand, if that's what you mean. The "surface" we see is called the "photosphere".
hydrosphere
3/4 of the earth's surface is water.
what involves both chemical and physical change on earths surface
The two dimensional representation of the Earth's surface on piece of paper is called a map. Maps can show an area in great detail or in very broad outlines.
yes
A Mountain
Face.
It is a map.