Teacher professional development and classroom resources across the curriculum
Teacher professional development and classroom resources across the curriculum
Learner Express: Modules for Teaching and Learning
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In spite of the similarity in outlines between the Atlantic coasts of Africa and South America, continental drift could not be explained until the theory of plate tectonics was developed in the 1960s. Ocean floor mapping provided much of the hard evidence, but for those who wish to examine the interior of the Earth more than 15km below the surface, seismic waves provide the only clues.
Subduction zones are where rock slides under less-dense rock. Magma, enriched with highly pressurized steam and CO2, rises to the surface under subduction boundaries, making volcanoes. View Video
Seismic waves produced by geological equipment or earthquakes can be used to probe the Earth's interior. View Video