The Earth's Interior

Over the past few days, we've been focusing on the interior of the Earth. We learned that scientists use seismic waves to determine that there are layers. When the waves pass through a layer that has different properties, the waves bend. We also learned about the 4 main layers of the Earth...the crust, mantle, outer core and inner core. They all have very different properties. Refer to your notes if you can't remember how they're different from each other. In addition, we learned about 2 very special layers: the lithosphere and the asthenosphere. The CRUST AND THE UPPERMOST MANTLE make up the brittle outer layer called the lithosphere. This layer is broken into large pieces called plates. We'll be learning more about these in the weeks to come. The asthenosphere is a thin layer directly below the lithosphere. This layer is slightly melted and acts kind-of like silly-putty...moving very,very slowly.

We also learned that there are convection currents in the asthenosphere and in the outer core. The currents of the outer core create Earth's magnetic field.

Have anything you want to share about the interior of the Earth? Did you find anything to be particularly interesting?