8.1. The spheres of planet Earth
8.1.1. Warm up. The spheres of planet Earth.
Match the terms and their general English equivalent.
8.1.2. Complete the table based on what you know about the earth’s structure.
"Earth-crust-cutaway-english" by Surachit - Self-made, based on the public domain image File:Earth-crust-cutaway-english.png by Jeremy KempThis vector image was created with Inkscape.. Licensed under CC BY-SA 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Earth-crust-cutaway-english.svg#/media/File:Earth-crust-cutaway-english.svg
8.1.3. The lithosphere and the astenosphere
In geology, a distinction is made between the lithosphere and the astenosphere. The lithosphere is made up of the Earth’s crust and the outermost part of the mantle. It is made up of solid rock, its thickness is between 60 and 150 kms. Under the lithosphere conditions change gradually. Instead of a solid state, rocks are in a so called plastic state. This layer is called the astenosphere. The litoshpere plates float on the top of the astenosphere.