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Layers&PlateTectonic

TermDefinition
Continental Crust Is dry land and is made of Less Dense rock.
Oceanic Crust Is under the ocean and is made of Dense rock.
Mantle The layer of rock between the Earth's crust and core.
Inner Core Is solid and is made of iron and nickel.
Outer Core Is liquid and is made of iron and nickel.
lithosphere The solid, outer layer of the Earth that consist of the crust and the rigid upper part of the mantle.
Asthenosphere The soft layer of the mantle on which the tectonic plates move.
Conduction Heat transferred by direct contact.
Convection The movement of matter due to differences in density; the transfer of energy due to the movement of matter.
Radiation The transfer of energy as electromagnetic waves.
Convection Currents The vertical movement of air currents due to temperature variations.
Plate Tectonics The theory that explains how large pieces of the Earth's outermost layer, move and change shape.
Pangaea The supercontinent that formed 300 million years ago and that began to break up 250 million years ago.
Continental Drift The hypothesis that states that the continents once formed a single land mass, broke, and drifted to their present places.
Sea-floor Spreading The process by which new oceanic lithosphere(sea floor) forms as magma rises to Earth's surface and solidifies.
Subduction The process by which one lithosphere plate moves beneath another as a result of tectonic forces.
Deep Open Trench A deep valley along the ocean floor through which oceanic crust slowly sinks toward the mantle.
MOR(Mid-ocean ridge) Along, undersea mountain chain that has a steep, narrow valley at its center.
Sonar Sound navigation and ranging, a system that uses acoustic signals and returned echoes to find objects/communicate.
Convergent Boundary The boundary between tectonic plates that are colliding.
Divergent Boundary The boundary between two tectonic plates that are moving away from each other.
Transform Boundary The boundary between tectonic plates that are sliding past each other horizontally.
Created by: mayawbee