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Question | Answer |
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Density: | The quality or condition of being dense. |
Crust: | The outer shell of earth including the continents of the ocean floor.This is the lithosphere, formed of sial and sima. |
Continental Crust: | The basement complex of rock, that is, meamorphosed sedimentary and volcsnic rock with associated igneous rocks mainly granitic, that underlies the continents and the continent and the continental shelves. |
Convection Current: | Mass movement of subcrustal or matle materisl sd the result of temperture variations. |
Convection Current: | Mass movement of subcrustal or matle material as the result of temperture variations. |
Oceanic Crust: | A thick mass of igneous rock which lies under the ocean floor. |
Convection: | The act or process of conveying; transmission. |
Outer Core: | The outer or upper zone of the warth's core, extending to a depth of 3160 miles,and including the transition zone. |
Asthnophere : | A zone of the earth's matle that lies beneath the lithosphere and consists of severl hundred kilometers of deformable rock. |
Tectonic Plates: | Anyone of the internally rigid crustal blocks of the lithosphere which move horzontally across the earth's surface relative to one another.Also known as crustal plate. |
Seismic Waves: | Vibration genated by a earthquake,explosion,or similar phenomnon and propagated within the earth or along it's surface. |
Seafloor-spreading: | Theory that oceanic crust forms along sumarine mountain zones, known collectively as the ocean ridge system, and spreads out laterally away from them. |
Mid-ocean Ridge: | A series of mountain ranges on the ocean floor,more than 84,000 kilometers in length. |
Rift Valley: | A vally that has developed along a rift. |
Convergent Boundary: | In plate tectonics, a convergent boundary, also known as a destructive plate boundary. |
Divergent Boundary: | The two tectonic plates move away from each other |
Tranform Boundary: | A strike-slip fault,common in mid-ocean ridge regions. |
Stress: | force against earth's surface. |
Folding: | The bending of rock layer due to stress. |
Seismograph: | A inturmet that records vibration in the ground and determines the location and strength of s earthquake. |
Lava: | The stuff from earth's core. |
Deformation: | The bending,tilg,and breaking of earth's crust. |
Fault: | A break in the body ro.ck a long which one block slides relative to another |
Epiccenter: | The point on earth's surface surface directly aove an earthquake's starting point. |
volcano: | A vent or a fissure in earth surface. |
compression: | Stress that occures when forces act to squeeze a object. |
Rift zone: | A area of deep cracks that form bettween two tectonic plates. |
Focus: | The point along a fault of which the frist motion of a earthquake. |
Vent: | A opening at the surface of earth. |
Tension: | Stress that occurs when forces act to stretch a object. |
Earthquake: | Cause by a fault. |
Magnitude: | How big the earthquake is. |
Ring of fire: | ring of volcanos in a ocean. |
Shearing: | Plates moving away from each other. |
Seimic wave: | A wave of enegry that travels away from the earthquake. |
Magma: | Lava that comes out a volcano. |
Hot Spot Volcano: | A active volcano. |