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Ch.7 Plate Tectonics
Question | Answer |
---|---|
the thin outermost layer of the Earth, or the uppermost part of the lithosphere | crust |
the layer of the Earth between the crust and the core | mantle |
the central, spherical part of the Earth below the mantle | core |
the outermost, rigid layer of the Earth that consists of the crust and the rigid upper part of the mantle | lithosphere |
the soft layer of the mantle on which the pieces of the lithosphere move | asthenosphere |
literally, the "middle sphere"- the strong, lower part of the mantle between the asthenosphere and the outer core | mesosphere |
the liquid layer of the Earth's core that lies beneath the mantle and surrounds the inner core | outer core |
the solid, dense center of the Earth | inner core |
a piece of the lithosphere that moves around on top of the asthenosphere | tectonic plate |
the theory that continents can drift apart from one another and have done so in the past | continental drift |
the process by which new oceanic lithosphere is created at mid-ocean ridges as older materials are pulled away from the ridge | sea-floor spreading |