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Mr. E. Science
Volcanoes
What is the difference between a shield volcano and a cinder cone volcano? How does the flow of lava influence the type of rock that's formed? A presentation on different aspects of volcanoes answers these questions for middle...
Curated OER
Plate Tectonics - Evolution of the Earth
Tons of photographs, diagrams, animations, and satellite images fill the slides of an education earth science presentation. It begins with volcanic activity and earthquakes, and then moves into plate tectonics, boundaries, and driving...