Dictation - Volcanoes and the bowels of the Earth 1/2-English

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Dictation - Volcanoes and the bowels of the Earth 1/2

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During my travels, I have been to various volcanic sites that fascinated me and I wanted to share them with you!
However, before we look at the formation of volcanoes, let ' s delve into the bouwels of our planet, from a vertical cross-section, to dicover its structure and activity.
From the core to the surface of the Earth, it is broke down into several superimposed layer.
At the centre of the Earth is the solid core, or ' seed ' , with a radius of 1200 kilometres in diameter, which lie at a depth of 6300 kilometres. It has a temperature of 4200°C. This iner core is said to rotate faster than the rest of the planet due to the action of the Earth ' s magnetic field. Although the inner core is very hot, it is solid because it is under very high pressure.
While having a composition similar to the Earth ' s solid inner core, the outer core remains liquid because there is insuficient pressure to maintain it in a solid state. Thus, the liquid core, locate at 5200 km with 3500°C, is a huge ocean of alloyed iron, nickel and lighter elements in which the ' seed ' is bathed. The liquid of the outer core is animates by rapid convective mouvements that induce a dynamo effect at the origin of the Earth ' s magnetic field.

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