Edexcel Geography A Level – Earth Final Exam And 100% Correct Answers 2024
Earth's Structure - Answer Crust, Mantle, Outer Core, Inner Core. Asthenophere - Answer The upper semi-molten part of mantle. Lithosphere - Answer A rigid layer made up of the uppermost part of the mantle and the crust. Oceanic Crust - Answer The portion of Earth's crust that is usually below the oceans and not associated with continental areas. Thinner and higher in density that continental crust and basaltic rather than granitic in composition. Convection Currents - Answer Circular currents in the mantle caused by the magma being heated by the core off the Earth. Slab Pull - Answer A mechanism that contributes to plate motion in which cool, dense oceanic crust sinks into the mantle and "pulls" the trailing lithosphere along. Ridge Push - Answer When the force of gravity moves a plate downward and away from a ridge. Sea-floor Spreading - Answer Tectonic plates diverge, magma rises up then cools to form a new crust. The sea floor gets wider over time. Creates mid-ocean ridges. Rift Valley - Answer A large elongated depression with steep walls formed Earth's surface between nearly parallel faults or fault systems. Constructive Plate Margins - Answer Seafloor spreading at ocean ridges creates new oceanic crust.
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- Subido en
- 12 de marzo de 2024
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- 2023/2024
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