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The top documents of stewart-higgins
Volcanoes How they change the surface of Earth!. Before eruptionAfter Eruption Mt. Saint Helens A volcano is a weak spot in the crust where magma is expelled
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Types of Rocks Chapter 31 There are three main types of rocks: 1.Igneous 1.Igneous - formed when molten rock cools. 2.Sedimentary 2.Sedimentary – formed
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