Learner Express: Modules for Teaching and Learning
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Spreading ridge volcanoes form in the deep sea where two plates are moving apart. View Video
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
Scientists have proposed that the Moon was formed from a collision in the early solar system. View Video
Scientists Chuck Blay and Dave Sherrod compare Hawaiian volcanoes to Mt. Saint Helens. View Video
The formation of two types of fossils are shown and discussed: an imprint in a rock and minerals replacing the shells of dead organisms. View Video
The gases that make up our atmosphere were released during volcanic eruptions in both the past and present. View Video
Scientists describe how mantle rock melts into magma and how the more buoyant, liquid magma floats toward the Earth's surface. View Video
Seismic waves produced by geological equipment or earthquakes can be used to probe the Earth's interior. View Video
Sediment on a beach contributes to the vast continental shelf offshore over time, but this does not explain where the sediment came from. View Video
Why do craters on the Moon have similar shapes? A planetary scientist uses a ball thrown into sand to illustrate the reason. View Video