Journey to the Center of the Earth
Channel: Earth Rocks!
Date: 2019-03-09

For an introductory college-level physical geology class: we travel down to the center of the Earth and then back to the surface on the other side alongside the waves produced by earthquakes. The ways in which these seismic waves move through the Earth (speeding up, slowing down, and sometimes disappearing) gives us information about what's inside our planet. We review what we know about each of Earth's layers: their thicknesses, composition, and physical properties -- including Earth's core, mantle, crust, lithosphere, and asthenosphere. 

Content within is based on information available in any standard introductory college geology textbook, such as Essentials of Geology -- Tarbuck and Lutgens -- Pearson Publishing.

**This video comes in the first 1/3rd of a semester class, but after students have learned about plate tectonics, Earth formation, mountain building, and earthquakes, so there may be terms with which the audience is unfamiliar. For a full playlist, refer to the Geology playlist on the EarthRocks! YouTube Channel.

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