Movement in the layers http://convectioncurrent.info.

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Presentation transcript:

Movement in the layers http://convectioncurrent.info

Occurs in asthenosphere Movement is convection Movement in mantle Occurs in asthenosphere Movement is convection Caused by changes in heat and density More dense Less dense

the number of particles in a substance Density the number of particles in a substance How tightly packed the particles are Draw example More dense material Will sink Less dense material Will rise or float

Convection As mantle is heated by outer core the particles (atoms and molecules) move faster and farther apart This movement makes the hot part of the mantle less dense The material will slowly rise toward the crust

Convection Mantle material is cooled as it nears the crust This cooling causes the particles in the material to move slower and closer together The cooler material will slowly sink back toward the outer core

Convection

Convection Convection is a flow of a fluid or air due to heating and cooling IE: Hot air rises. Cold air falls.

This material is magma and occurs in the Earth’s mantles asthenosphere Convection Current Convection Currents movement within a fluid by heat energy causing them to move in a circular fashion, This material is magma and occurs in the Earth’s mantles asthenosphere

Uses of Convection Hot air balloons

Uses of convections Boiling water

Uses of convection Heating and cooling homes

Uses of Convection Weather

Convection Currents and Plate Tectonics http://www.windows2universe.org/earth/interior/how_plates_move.html

Animation of Plate movement convection currents experiment - YouTube http://www.absorblearning.com/media/attachment.action?quick=12p&att=2775 http://education.sdsc.edu/optiputer/flash/convection.htm http://safeshare.tv/w/BmQVFPAdFm

Compression – pushing together Forces within the Earth caused by convection currents Convection Currents in asthenosphere Meeting This creates a CONVERGENT plate boundary

Forces within the Earth caused by convection currents Convection currents In asthenosphere Moving away Creates a DIVERGENT Plate boundary

Shearing - moving side-by-side Forces within the Earth caused by convection currents Convection currents In asthenosphere Side by side create a TRANSFORM plate boundary