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Plate Tectonics

Author: Gabe Leedy
Across
A deep canyon on the ocean floor
The layer of rock that forms the Earth"s outer surface
A layer of molten iron and nickel that surrounds the inner core of the Earth
Dense ball of solid material at the center of the Earth
Thickest layer of the earth;it consists of two layers, the lithosphere and the asthenosphere
Causes the plates to move; between the lithosphere and the asthenosphere
A soft layer of mantle on which the lithosphere floats
Name of single landmass that broke apart 225 million years ago
A deep valley where two plates move apart
The process by which molten material adds more oceanic crust to the ocean floor
A break or crack in the Earths lithosphere along which rocks move
A plate boundary where two plates move toward each other
Down
A rigid layer made up of the uppermost part of the mantle and the crust
A plate boundary where two plates move away from each other
A plate boundary where two plates move away from each other
Alfred Wegener's theory that the continents were once one huge landmass but have since then drifted apart
The undersea mountain chain where new ocean floor is produced; a divergent boundary