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Unit F: Volcanoes

The Layered Earth: Unit F, Volcanoes. Lesson Key Concepts. F1: Formation of Volcanoes. How are volcanoes formed? Key Concepts: Most volcanoes occur along plate boundaries. Volcanoes that occur away from plate boundaries are due to rising plumes of hot mantle rock (hot spots). F2: Types of Volcanoes. How do we classify volcanoes? Key Concepts: The shape of a volcano is determined by the chemical composition of the magma. F3: Living With Volcanoes. What are the major social and economic impacts of volcanoes? Key Concepts: Volcanoes have both positive and negative effects on society.