plate techtonics Flashcards
the solid outer layer of the earth that consists of the crust and the rigid upper part of themantle
Lithosphere
the soft layer of the mantle on which the techtonic plates move
Asthenosphere
the strong lower part of the mantle between the asthenosphere and the outer core
Mesosphere
the inner core is the solid dense center of our planet that extends from the bottom of the outer core to the center of the earth which is about 6380 km beneath the surface
Inner Core
the earths core is divided into 2 parts the outer core and the inner core the outer core is the liquid layer of the earth’s core that lies beneath the mantle and surrounds the inner core
Outer Core
a wave of energy that travels through the earth away from an earthquake in all directions
Seismic Waves
the relatively thin part of the earth’s crust which underlies the ocean basins
Oceanic Crust
the relatively thick part of the earth’s crust that forms the large landmasses
Continental Crust
the ratio of the mass of a substance to the volume of the substance
Density
he is most famous for his hypothesis on continental drift
Alfred Wegener
the hypothesis that states that the countries once formed a single landmass broke up and drifted to their present location
Continental Drift
the boundary formed by the collision of 2 lithosphere plates
Convergent Boundary
the boundary between 2 techtonic plates that are moving away from each other
Divergent Boundary
the boundary between techtonic plates that are sliding past each other horizontally
Transform Boundary
the process by which new oceanic lithosphere forms as the magma rises toward the surface and solidifies
Sea-floor Spreading
