Hiv a Communicable Disease HIV: A Communicable Disease HIV, Human Immunodeficiency Virus, is a communicable disease... that was once considered a death sentence years ago. It is a disease that is contracted by the exchange of bodily fluids such as blood, semen, and vaginal secretions.
As a result of pressure, friction, and plate material melting in the mantle, earthquakes and volcanoes are common near convergent boundaries. When two plates move towards one another, they form either a subduction zone or a continental collision.This depends on the nature of the plates involved. subduction zone is formed at a convergent plate boundary when one or both of the tectonic plates is composed of oceanic crust. The denser plate, made of oceanic crust, is subducted underneath the less dense plate, which can be either continental or oceanic crust.
Convergent boundaries can be of three types: Subduction demonstration. Ocean-Ocean Convergence: If the plates moving toward each other are both made of oceanic crust, one of the plates will move downward, or subduct, under the other plate.This is called a subduction zone.his relative movement of the plates creates varying conditions at the plate edges, or boundaries. Geologists describe three basic types of plate boundaries: divergent boundaries, convergent boundaries, and transform boundaries.