Or skip to specific slides: Table of Contents Title Slide Earth consists of a series of concentric layers or spheres Physical state is determined by the combined effects of pressure and temperature. Layered Earth - Evidence Of Earthís Layers Layered Earth - Chemical Properties Layered Earth - Physical Properties Three fluid spheres surround the rocky portion of the Earth. Physiography and bathymetry (submarine landscape) allow the sea floor to be subdivided into three distinct provinces Bathymetric regimes Continents and ocean basins differ in composition, elevation and physiographic features. Isostacy refers to the balance of an object 'floating' upon a fluid medium Examples of isostasy Oceanic vs. continental crust Plate tectonics Pangaea Sea floor spreading demonstrates that the sea floor moves apart at the oceanic ridges and new oceanic crust is added to the edges. Seafloor Spreading - A Key Idea

The geomagnetic field is the magnetic field of the Earth. Geomagnetism Confirmation of the Theory of Plate Tectonics Sea Floor Spreading Global Plate tectonics Subduction Earth's surface is composed of a series of lithospheric plates Global distribution of earthquakes The Major Lithospheric Plates Plate Boundaries I Plate Boundaries II Plate Boundaries III Confirmation of the Theory of Plate Tectonics Confirmation of the Theory of Plate Tectonics Confirmation of the Theory of Plate Tectonics Confirmation of the Theory of Plate Tectonics Overview of bathymetric/tectonic profiles Summary