Fill in the Blanks Internal Dynamics of the EarthOnline version Sección bilingüe by Secundaria Digital 1 The internal energy of the Earth comes from two main sources : a ) The energy produced by the of radioactive in the mantle and crust . b ) The of the heat accumulated during the Earth's . The solid part of the Earth is divided into different separated by areas known as , in which the seismic waves change their . Lithosphere : It's the layer of the Earth , it included the and the . It's subdivided into . The movement of the tectonic plates : Heat rising and falling inside the mantle create , which move the plates . The point where two plates meet is called a plate . There are different types : At a or divergent boundary the plates move . At a or convergent boundary the plates move towards . At a , or transform boundary the plates .
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