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Ten Important Sentences: Volcanoes – 3.5 Directions: 1. Find each sentence in the book. 2. Put the page number beside each sentence. 3. Cut apart each sentence. 4. Put them in the correct order. 5. Glue them to your paper! 1: Every day somewhere volcanoes erupt. 10: Scientists are learning what causes volcanoes and how they erupt. The crust, where w live, is covered by land and oceans. Where two plates meet, the mantle grows hotter, and volcanoes form near the edges. But not all volcanoes explode. Over thousands of years, a volcano may erupt again and again. If too much gas is trapped inside, part of the mountain may blow off, hurling rocks heavier than elephants for miles. Where two plates meet, the force is so great that rocks bend or even break. The answers lie deep beneath our feet in the four parts of the earth—the crust, the mantle, the outer core, and the inner core. It is several large pieces called plates that cover the planet like a giant jigsaw puzzle.