Alfred Wegener's theory of continental drift states that continents can drift apart from another and have done so in the past.
Alex Wegener a scientist whomst ideas were first laughed at but later helped us understand a lot more.
Transform boundaries only happen when two plates slide past each other. This is called shearing.
Tension Stress that occurs when forces act to stretch an object. Fault A break in the Earth's crust which blocks of crust blocks of crust slide relative to one another. Strike-slip occurs where two plates slide horizontally to one another.
Occurs when two plates push against eachother.
Subduction The downward movement of a plate into the mantle beneath another plate. Oceanic Crust Similar to basalt. Continental Crust Similar to granite. Density Consistency measured by mass per unit volume.
Occurs when two plates pull apart. After these plates have moved apart magma will rise creating seafloor(seafloor spreading).
Convection Current When heat rises and falls when cooled. Mid-Atlantic Ridge Longest mountain range in the world made by divergent plates.
Occurs when tectonic plates slide.
Occurs when molten rock forces itself to the the surface.
Ring of Fire A trail of active volcanoes on the pacific plate. Explosive A big eruption shooting out ash,gas,and lava. Non-Explosive A smaller eruption that just flows out of the volcano. Shield Volcanoes built out of nonexplosive eruptions.