The earth can be described - as a "ball of rock". , The hot core is  - hotter than 4000 ºC., The hot core - is surrounded by the mantle., The mantle is - a thick shell of molten rock., The crust - floats on the mantle., The litosphere forms - the surface layer of rocks and minerals., People live and work - in the litosphere., The most important layer for people - is the crust. ,

Earth's Structure

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