Science Quiz / 5th Grade Inside Earth Chapter 1 Section 3-5

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HintAnswer
the hypothesis that the continents slowly move across Earth's surface
a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
a section of the lithosphere that slowly moves over the asthenosphere, carrying pieces of continental and oceanic crust
a deep valley that forms where two plates move apart
an undersea mountain chain where new ocean floor is produced
a plate boundary where two plates move toward each other
a plate boundary where two plates move past each other in opposite directions
a trace of an ancient organism that has been preserved in rock
HintAnswer
a break in Earth's crust where masses of rock slip past each other
a plate boundary where two plates move away from each other
the name of the single landmass that broke apart 200 million years ago and gave rise to today's continents
a device that determines the distance of an object under water by recording echoes of sound waves
the theory that pieces of Earth's lithosphere are in constant motion, driven by convection currents in the mantle
the process by which molten material adds new oceanic crust to the ocean floor
the process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary
a well-tested concept that explains a wide range of observations

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