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Kramer

Kramer Earth Science Chapter 4

QuestionAnswer
Plasticlike layer of Earth on which the lithosperic plates float and move around Asthenosphere
Wegener's hypothesis that all continents were once connected in a single large landmass that broke apart about 200 million years ago and drifted slowly to their current positions. Continental drift
Current in Earth's mantle that transfers heat in Earth's interior and is the driving force for plate tectonics Convection current
Rigid layer of Earth about 100 km thick, made of the crust and a part of the upper mantle Lithosphere
Large, ancient landmass that was composed of all the continents joined together Pangaea
Large section of Earth's oceanic or continental crust and rigid upper mantle that moves around on the asthenosphere Plate
Theory that Earth's crust and upper mantle are broken into plates that float and move around on a plasticlike layer of the mantle Plate tectonics
Hess's theory that describes how rocks slowly change from one form to another through time Seafloor spreading
Created by: marilyn.kramer
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