Investigation 5: Changes in the Ocean Floor

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To learn more about plate tectonics, visit the following web sites:

When the Earth Moves: Seafloor Spreading and Plate Tectonics, National Academy of Sciences
Historical account of plate tectonic theory

This Dynamic Earth: The Story of Plate Tectonics, USGS
An account of the development of plate tectonic theory.

Plate Tectonics, USGS Earthquake Hazards Program
Lists links to many other educational sites about plate tectonics.

Find a global topographic maps.

How to Find a Map

IES Oceans Cover
AGI/It's ABout Time


AGI's professional development programs for teachers are supported by generous contributions from corporate contributors of the American Geosciences Institute Foundation and the American Association of Petroleum Geologists Foundation.