This document defines volcanoes as vents in the Earth's surface through which magma erupts and builds up landforms. It identifies three main types of volcanoes: cinder cones, which are small, steep-sided cones built from pyroclastic material; composite or strato volcanoes, which are tall conical mountains formed by layers of erupted rock and ash; and shield volcanoes, which are broad domes built from lava flows with a gentle slope. The document provides images to help differentiate between these three volcano types.
6. Central vent filled with rock fragments Successive layers of ejected material Central vent filled from previous eruption Pyroclastic layers Lava flows Radiating clicks Lava flow Central vent
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