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The Dynamic earth
Plate Tectonics
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Plate Boundaries
Convergent boundaries
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Earthquakes
Divergent boundaries
intrataple volcanism
Earthquakes
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Ring of fire - area where a large number of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean.
Lava - fire.....
Magma - is a mixture of molten or semi-molten rock, volatiles and solids.
Silica content - composition of different types of magmas.