Crustal plate movement occurs because the Earth's mantle flows as a result of uneven heating inside the mantle. Convection cells
are created by very hot material deep in the mantle rising, then cooling, sinking again, and then heating again and then repeating the cycle. This process occurs because of the energy generated by _________________ within the Earth.
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The metal alloy that constitutes Earth's core is distinct in terms of chemistry, while having a similar density compared to the rocky mantle.
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