plate tectonics Crossword

the layer of rock that forms earths outer surface
rock that floats high on the mantle that makes up the continents
the layer of hot solid material between earths crust and core
a ridged layer made up of the uppermost part of the mantle crust
the soft layer of the mantle on which the lithosphere floats
a layer of molten lava and nickel that surrounds the inner core of earth
a dense spear of solid iron and nickel at the center of the earth
a plate boundary where two plates move away from each other
a plate boundary where two plates move towards each other
the name of the single landmass that broke apart 200 million years ago and gave rise to todays continents
The hypotheses that the continents slowly move across Earth's surface
a trace of an ancient organism that has been preserved in rock
the process by whichoceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary
an undersea mountain chain where new ocean floor is produces
a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
a deep valley that forms where two plates move apart
a plate boundary where two plates move past each other in opposite directions
a section of the lithosphere that slowly moves oner the atmosphere carrying pieces of continental and oceanic crust
the theory that pieces of earths lithosphere are in constant motion driven by convection currents in the mantle
a break or crack in earths lithosphere along which the rocks move