Ranjit97
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STRUCTURE OF EARTH + CONSTRUCTION MATERIALS

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Ranjit97
Created by Ranjit97 over 5 years ago
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1 A (STRUCTURE OF EARTH)
1.1 OUTER LAYER OF EARTH= LITHOSPHERE
1.1.1 cold,rigid,comprimises crust and top part of mantle
1.2 Tectonic plates
1.2.1 Less dense than mantle
1.2.2 Move due to convection currents
2 Crust to thick to drill
2.1 Information of earth collected by seismic waves
2.2 OR man made expolsions
3 Wegener's theory
3.1 Africa + south america one land mass
3.2 accepted because wide range of evidence + discusses and tested by many scientists
3.3 1960's new sea floor spreading evidence
4 Subduction
4.1 Oceanic crust denser than continental crust, they colliide
4.1.1 Oceanic plate sinks,pulling plate down and melting it as it reaches hotter part of mantle
5 CONSTRUCTION MATERIALS B
5.1 RAW MATERILS
5.1.1 EXAMPLES 1,CLAY-BRICK. 2.LIMESTONE+CLAY-CEMENT
5.1.2 HARDNESS MEASURED BY RUBBING 2 MATERILS TOGETHER
5.1.3 FROM EARTHS CRUST
5.2 3 TYPES OF ROCK
5.2.1 SEDIMENTARY
5.2.1.1 Limestone-made from soft sediments compressed/cemented 2gether
5.2.1.1.1 Makes limestone soft
5.2.2 METAMORPHIC
5.2.2.1 Limestone changed by heat/pressure
5.2.2.2 Composed of an interlocking mosaic of carbonate crystals
5.2.3 IGNEOUS
5.2.3.1 Granite formed when magma cools/solidifies
5.2.3.2 Granite is a igneous rock with interlocking crystals, makes it very hard

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