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Khan Academy
Khan Academy: Plate Tectonics: Difference Between Crust and Lithosphere
The instructor explores the plates in the makeup of Earth's surface. Evidence and theories about plate tectonics are featured. [8:00]
PBS
Pbs Learning Media: Collecting Data Below the Earth's Surface
This video segment adapted from Discovering Women demonstrates how scientists use sound waves to collect data about the structure of Earth's crust.
Minute Earth
Minute Earth: How Tall Can Mountains Be?
Find out the geological and physical reasons why really tall conical mountains can not exist on Earth. [1:54]