Okay this is going to be long :XIN GENERAL...Divergent Plate Movement (plates move away from each other)-Continental and continental, oceanic and oceanic-Constructive Plate BoundaryConvergent Plate Movement (plates move towards each other)-Continental and Oceanic, Oceanic and Oceanic, Continental andContinental-Destructive Plate BoundaryTransform Plate Movement (plates sliding past each other)-Continental and Continental-Conservative Plate BoundaryDIVERGENT PLATE MOVEMENTWhen plates move apart, magma wells up from Earth's mantle toform a new ocean floor with mid-oceanic ridges.It is a constructive plate boundary because new land crust isbeing created.O & O (Oceanic and Oceanic)Oceanic Ridges and Submarine volcanoes are formed. Shallowearthquakes may occur and there may be volcanic activity.Magma from the deeper mantle wells up into the gap formed whentwo oceanic plates move away from each other, and some of it meltsand is erupted on the surface as lava, while others are injectednear the surface to crystallize as other igneous rocks.The seafloor may also spread, and magma rises to the floor andsolidify, forming new crust. Therefore it is a constructive plateboundary as new crust is formed and added to the ocean floor. Anexample of the resulting landforms would be the Mid-AtlanticRidge.C & C (Continental and Continental)When two continental plates move away from each other, a sea isformed. E.g. Red Sea.CONVERGENT PLATE MOVEMENTWhen plates move towards each other, they may collide.When 2 oceanic plates collide, plate edges are bent into a deeptrench called thesubduction zone. It is a destructive plateboundary because the subducted plate is destroyed in theprocess.O & OSubduction takes place, and the over-riding plate (the plateabove) folds and form islands, whilst the heavier plate sinks intothe mantle of the Earth and is melted away by the magma. The magmarises and forms volcanoes. E.g. Japan.C & OWhen an oceanic plate collide with a continental plate, theoceanic plate sinks as it has a larger density. Lithospherematerials from the oceanic crust are subducted in the trench whilstthe continental border is fractured, folded and uplifted. Magmarises and a mountain accompanied by volcanic activity areformed.E.g. Andes Mountains.C & CWhen two continental plates collide, neither sinks because theyhave similar densities. The continental lithosphere buckles and isuplifted instead, forming fold mountains. Little volcanic activityoccur as rocks from the lithosphere do not sink deep into theasthenosphere (upper mantle zone) Earthquakes, faulting and foldinghowever, are common.E.g. Himalayas.TRANSFORM PLATE MOVEMENTOccurs when two plates slip past each other. Tear faults form,accompanied by earthquakes due to great amount of stress built upin these areas, but there is little volcanic activity and littlecrustal material is destroyed.