plsdticlike layer of earth on which the lithosphere plates float and move around.

Wegener's hypothesis that all continents were once connected in a single large landmass that broke apart 200 million years ago and slowly drifted to their current postitions.

current of earth's mantle that transfers heat in earth's interior and is the driving force for plate tectonics.

riged layer of earth about 100 km thick, made of the crust and a part of the upper mantle.

large, ancient landmass that was composed of all of the continents joined together.

a large section of earth's oceanic or continental crust and rigid upper mantle that moves around on the athensophere.

Therory that earth's crust and upper mantle are broken into plates that float and move around on a plastic like layer of the mantle.

Hess's theory that new seafloor is formed when magma is forced upward toward the surface at mid-ocean ridge

plastic like layer of earth on which the lithospheric plates float and move around

wegengers hypothesis that all continents were once connected in a single large landmass that broke apart about 200 million years ago and drifted slowly to their current positions

current in earths mantle that transfers heat in earths interior and is the driving force for plate tectonics

rigid layer of earth about 100 km thick, made of the crust and a part of the upper mantle

large, ancient landmass that was composed og all the continents joined together

a large section of earths oceanic or continental crust and rigid upper mantle that moves around on asthnosphere

theory that earths crust and upper mantle are broken into plates that float and move around on a plastic like layer of mantle

hess's theory that new sea floor is formed when magma is forced upward toward the surface at the mid-ocean ridge