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A typical volcano consists of a magma chamber , a vent (the "pipe"), and a crater at the top.
The exact point inside the Earth where the rock breaks or moves. uchebnik po geografii lobzhanidze tema:vnutrenie sily zemli
Scientists use an instrument called a seismograph to record waves. The intensity is often measured on the Richter scale (magnitude) or the Mercalli scale (damage level). 3. Volcanism A typical volcano consists of a magma chamber