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Name The Era Scientific Where’ s It Layers Of The Earth Knowledge Happening Name It 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500 Age of recent life What is Cenozoic? Age of Ancient life What is Paleozoic ? Age of Middle life. What is the Mesozoic? 4.5 billon years fall into this time span . What is the Precambrian? Daily Double Random Question A group of interaction or interdependent parts that form a complex whole. What is a system? The very thin outer solid layer of Earth. What is the crust? The crust below the ocean. What is oceanic crust? A crust that averages 35-40 km in thickness. What is continental crust? The less dense rocky layer beneath the crust. What is the mantle? The dense center of the earth. What is the core? Collection of raw data from which theories and laws are formulated. What is observation? A untested explanation for what has been observed. What is a hypothesis? A well-tested & widely accepted view. What is a theory? A generalization about the behaviour of nature from which there has been no known deviation after many observations and experiments. What is a Law? Daily Double The explanation for the movement of the continents. What is the Theory of Plate Tectonics? What is divergent boundary? What is a convergent boundary? What is a transform fault boundary? What is seafloor spreading? What is a subduction zone? This forms from the crystallization of magma. What is igneous rock? Rock formed from weathered products. What is sedimentary rock? Something that can be replenished over a short time span. What is a renewable resource? Rocks formed by heat, pressure, and/or chemically active fluids. What is metamorphic rock? Something that is so slow that significant deposits may take millions of years to accumulate. What are non-renewable resources?