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Earth's History

ESS Regents Review

QuestionAnswer
*Earth has a long and complex history that spans over ______billion years. 4.6
method used to determine the absolute age of rocks and fossils radioactive dating,
the scientific theory that explains how the Earth's surface is constantly changing due to the movement of tectonic plates. plate tectonics
crustal plates ride on top of the plastic-like mantle layer powered by convection currents
The age of rocks of the ocean floor is younger near mid-ocean ridges and older farther away. This is a result of sea-floor spreading
matching fossils and rock structures on adjacent landmasses provide evidence for Pangaea
The Earth's magnetic field has flipped many times in history. Scientists have found patterns of these reversals in oceanic crust, further supporting sea-floor spreading
Created by: ljasso
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