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Science

Inside Earth Chapter 1 Sections 3/4

TermDefinition
Continental Drift A theory that continents can drift apart from one another and have done so in the past.
Pangea An extremely large landmass when all continents were connected together.
Fossil The imprint or hardened remains of a plant or animal that lived long ago.
Deep-Ocean Trench A deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle.
Mid-Ocean Ridge Giant undersea mountain range extending around the world like the seams of a baseball.
Sonar A system that uses the reflection of underwater sound waves to detect objects.
Seafloor Spreading The idea that the middle of the ocean is spreading apart, moving very slowly in opposite directions.
Subduction Process in which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent boundary.
Created by: peckcam11
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