The ... is made up of: Inner Core, Outer Core, Mantle, Asthenosphere, Lithosphere, Continental crust and Oceanic crust
Earth
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Structure of the Earth: Thickness of 5-10km, a density of 3.0kg/m3 and is made up of basalt, silicon and magnesium
Oceanic Crust
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Structure of the Earth: Thickness of <30-70km, a density of 2.6-2.7 kg/m3 and is made up of granite, silicon and aluminium
Continental Crust
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Structure of the Earth: The solid, outer part of the Earth including the upper mantle and crust. It sits between the crust and asthenosphere and has a varying thickness as it melts into the asthenosphere marking no clear boundary
Lithosphere
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Structure of the Earth: It extends from 100-300km down into the Earths mantle. Its semi-molten, viscous and capable of flowing slowly
Asthenosphere
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Structure of the Earth: The second layer in the Earths structure, which is 10-15km below oceanic crust and 35km below continental crust. It reaches a depth of 2,900km, has a density between 3.3-5.6kg/m3 and is made up of Iron and Magnesium
Mantle
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Structure of the Earth: The third layer in Earths structure, at 2,200km thick and made up of liquid iron and Nickel, and has a temperature between 4,500 and 5,500 degrees C. This metal creates convection and Earths magnetic field
Outer Core
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Structure of the Earth: The final layer in the Earths structure which is 1,220km thick and has a temperature of 5,200 degrees C. It's a hot, dense ball of mainly Iron, but because the pressure is so high, the Iron is in solid state
Inner Core
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... are when heat comes from within the mantle. Hot rock rises and cold rock descends. Very slow motion in solid state transfers stresses to the lithosphere. Shallow ... moistens and cools atmosphere, whilst deep ... dries and warms atmosphere
Convection Currents
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... is lateral movement of new oceanic crust away from a mid-ocean ridge. They are formed at constructive plate boundaries and is evidence to proove palaeomagnetism. The crust acts like a conveyor belt
Sea floor spreading
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... is studies confirming sea flood spreading. The earths magnetic field changes every 400,000 years and particles called magnetite (formed form iron) record the earths magnetic orientation
Palaeomagnetism
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Age of ... investigates ocean sediments and crustal rocks in the deep ocean. Cores of 7000m were drilled and showed evidence for sea-floor spreading. The oldest sediment was found nearest continents and no rock is older than 200 million years old
Sea floor rocks
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... evidence for continental drift: Rocks of the same age and type displaying same formations are found. Mountain trends are similar in Eastern USA and North West Europe. Similar glacial deposits are found in Antarctica, South America and India
Geological
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... evidence for continental drift: Similar fossil formations are found on either side of the Atlantic. Plant remains from the humid swamps that later formed coal deposits have been found in Antarctica and India
Biological
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Other cards in this set
Card 2
Front
Structure of the Earth: Thickness of 5-10km, a density of 3.0kg/m3 and is made up of basalt, silicon and magnesium
Back
Oceanic Crust
Card 3
Front
Structure of the Earth: Thickness of <30-70km, a density of 2.6-2.7 kg/m3 and is made up of granite, silicon and aluminium
Back
Card 4
Front
Structure of the Earth: The solid, outer part of the Earth including the upper mantle and crust. It sits between the crust and asthenosphere and has a varying thickness as it melts into the asthenosphere marking no clear boundary
Back
Card 5
Front
Structure of the Earth: It extends from 100-300km down into the Earths mantle. Its semi-molten, viscous and capable of flowing slowly
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