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Glesmann Plate Tect

Chapter 3 lesson

QuestionAnswer
continental drift hypothesis that continents were once joined together then moved apart
pangaea supercontinent that formed 300 million years agao
midocean ridge undersea mountain range where new ocean floor is made at divergent boundaries
seafloor spreading process of molten rock rising from the mantle creating new crust
deepocean trench deep valley on the ocean floor where oceanic crust sinks toward the mantle
subduction oceanic crust sinks under a deep-ocean trench to the mantle
plate tectonics theory that Earth's plates are in constant motion on the mantle
fault crack in Earth's crust where plates slide past each other
divergent boundary where two plates move away from eachother
convergent boundary where two plates come together
transform boundary where two plates slide past each other in opposite directions
constructive force any natural process that builds up Earth's surface
destructive force any natural process that breaks down Earth's surface
Created by: jglesman
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