The heat from Earth's core results in the cycling of matter in the mantle through convection currents. The model shows four locations on Earth labeled P-S and how the mantle circulates heat from the core to the crust. O Location P O Location S Location R S O Location Q crust R mid-ocean ridge Q Where on the model are the oldest rocks of the crust? convection current P convection current ocean trench

Q: O A P m H

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