5th Grade Inside Earth Chapter 1 Section 3-5

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Can you match the terms from Chapter 1 Section 3-5 with their descriptions?

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

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