structure of the earth
Answer (1)
Answer:The structure of the Earth is divided into several layers, each with distinct physical and chemical properties. From the outermost to the innermost, the main layers are:---1. CrustType: Solid, outermost layerThickness:Continental crust: ~30–70 kmOceanic crust: ~5–10 kmComposition:Continental: granite-like (rich in silica and aluminum)Oceanic: basalt-like (rich in magnesium and iron)Characteristics:Relatively thin and brittleBroken into tectonic plates---2. MantleType: Solid, but behaves plastically over long time scalesThickness: ~2,900 kmComposition: Silicate rocks rich in magnesium and ironSub-layers:Upper mantle (includes the asthenosphere): partially molten and allows tectonic plates to moveLower mantle: more rigid due to higher pressureTemperature: Up to ~4,000°C near the base---3. CoreDivided into two parts:a. Outer CoreType: LiquidThickness: ~2,200 kmComposition: Mostly iron and nickelFunction: Movement of liquid metal generates Earth’s magnetic fieldb. Inner CoreType: SolidRadius: ~1,220 kmComposition: Mainly iron and some nickelTemperature: Up to ~5,500°C (hotter than the surface of the Sun)
