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11 Cards in this Set
- Front
- Back
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Lithosphere |
Made of crust and outer mantle. Rigid and cold. Less dense than mantle so tectonic plates float of top. |
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Why plates move |
Convection currents in the mantle |
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Subduction |
Oceanic plates are denser and cooler than continental. So if they collide the Oceanic plate is pulled under and partially melts, sometimes causing volcanoes |
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Continental drift |
. Wegners theory in 1914 (puzzle proof) no explanation > disbelieved.After science advances people's began to accept because of subduction and spreading sea floor. .After science advances people's began to accept because of subduction and spreading sea floor. .After science advances people's began to accept because of subduction and spreading sea floor. After science advances people's began to accept because of subduction and spreading sea floor. |
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Igneous rock |
Lava cools quickly > small crystals e.g. basalt rhyolite Magma cools slowly > big crystals e.g. gabbro granite Rich in iron > basalt and gabbro Rich in silica > rhyolite and granite |
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Construction materials |
Metals are extracted from ores Brick are baked clay Glass is heated sand Limestone is quarried Aggregate is crushed lumps of limestone |
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Quarries |
Pro. Provide rural jobs Valuable products Economic success Con. Destroys habitats/landscape Damages tourist industry (ugly) Noisy, affects quality of life Produced extra traffic |
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Hard rocks |
Hight temp and pressure in the earth can change the crystal structure of rocks. Granite is stronger than marble is stronger than limestone. |
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Thermal Decomposition |
CaCO3 - CaO + CO2 Metal Carbonate > metal oxide + carbon dioxide |
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Cement |
Heat powdered limestone with clay Mix with and water to make mortar (sets, absorbs co2 to forms crystals) Mix with sand, Aggregate and water to make concrete and steel for reinforced concrete. Steel is flexible Concrete is hard |
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Purifying copper |
Heat crushed copper ore with co2. (Carbon is more reactive than copper so copper oxide is usually formed) The copper oxide is then heated with carbon to form pure copper in a reduction reaction. This copper is purifying via electrolysis. |
