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| Scientists rely for discovering how physical universe works |
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| explanation based on obersvational data and experiments |
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| Coherent set of hypotheses explaining some aspect of nature |
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| Information preserved in rocks that have been formed @ various times through history. |
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| Principle of Uniformitarianism |
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| Geologica processes we see in action today are the same as the past |
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| discovered principle of uniformitarianism |
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| earthquakes and volcanism |
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| Convergent plate boundaries are characterized by |
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| boundary that does not create or destroy plates |
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| new oceanic lithosphere is created |
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| random reversals of Earth's magntic field during cooling of basalt |
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| linear magnetic anomalies are caused by |
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| asthenosphere and lithosphere |
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| most important difference for understanding plate tectonics is between |
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| along oceanic ridge system |
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| youngest rocks of baslatic crust on sea floor are found |
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| no plate boundary of any kind |
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| formation of hawaiian islands is associated with |
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| distance from earth's surface to base of mantle |
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| most abundant element in Earth's crust |
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| solar energy is responsible for |
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| oceanic crust is less dense than continental crust |
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| most abundant element in earth's core |
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| outermost mechanical layer of earth |
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