The Earth is made up of layers - and we can define those layers in two ways  - as being chemical (crust, mantle, core) or mechanical (lithosphere, asthenosphere, mesosphere, outer core, inner core).  This episode explains the layers and why they are important for plate tectonics and more. Teachers can download a worksheet for their students to complete based on the content of this episode right here :  https://geoetc.com/earths-layers-free/ Support the show