In short, an acid is a compound that can give up a hydrogen ion (a proton, H+) in solution. A base is a compound that can accept a proton. If you're looking at chemical equations, the acid will be the compound with more hydrogen atoms.Usually, an acid is positively charged.n short, an acid is a compound that can give up a hydrogen ion (a proton, H+) in solution. A base is a compound that can accept a proton. If you're looking at chemical equations, the acid will be the compound with more hydrogen atoms.
The lithosphere is the brittle outer layer of the solid Earth. The plates of plate tectonics are segments of the lithosphere. Its top is easy to see -- it's at the Earth's surface -- but the base of the lithosphere is in a transition, which is an active area of research.
The collision of the plates causes subduction and destruction of the ocean plate. Note the formation of a trench at the plate boundary and a line of volcanoes called an island arc. (Diagram by Phyllis Newbill). In the diagram above, the ocean lithosphere subducts underneath the continental lithosphere.This results in the destruction of the ocean lithosphere and the formation of magmas (with island arc volcanoes above). The deep ocean trench marks the plate boundary and is where the subduction of the ocean lithosphere begins.t these boundaries, two neighboring plates move away from each other. Continental rift valleys are characterized by normal faulting and basalt-rich volcanoes. The diagram shows a typical continental rift. Note the central rift valley that includes volcanoes.