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Plate Techtonics

Across
The geological theory that states that pieces of the Earth's lithosphere are in constant, slow motion is the theory of
Heat transfer in a fluid takes place by
The process by which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is known as
Indirect evidence about the Earth's interior
Bouncing echoes used to map the mid ocean range
The transfer of heat through empty space
Down
Movement of the Earth's plates is caused by what in the Earth's mantle
A place where two plates slip past each other, moving in opposite directions, is known as what type of boundary
Direct evidence about the Earth's interior
In sea-floor spreading, molten material rises from the mantle and erupts along a
The one time supercontinent
Old oceanic crust is more dense than new oceanic crust because it is
Convection currents need what to keep moving?