Many minerals are trapped inside rocks.
Answer:
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Trench: very deep, elongated cavity bordering a continent or an island arc; it forms when one tectonic plate slides beneath another. Ridge: underwater mountain range that criss-crosses the oceans and is formed by rising magma in a zone where two plates are moving apart.
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<span>Convection means a certain type of movement of a fluid. Convection occurs in atmosphere, the oceans, in a boiling pot of water, among others. The movement is also known as convection currents. In the case of the Earths crust, convection means that the liquid magma on which the crust floats is moving in a circular fashion, rising from higher depths closer to the crust. When it reaches the crust it changes direction and flows underneath the crust, making it move. </span>
The geographic term “Asia” was originally used by ancient Greeks to describe the civilizations east of their empire. Ancient Asian peoples, however, saw themselves as a varied and diverse mix of cultures—not a collective group. Today, the term “Asia” is used as a cultural concept, while subregion classifications describe the distinct geopolitical identities of the continent. These classifications are Western Asia, Central Asia, Southern Asia, Eastern Asia, Southeastern Asia, and Northern Asia.
