The Earth is made up of a total of 7 layers which are- crust, lithosphere (crust and uppermost mantle), asthenosphere (upper mantle directly below the lithosphere), lower mantle, outer core and ...

Here the mantle melts to form molten magma which rises as the plates move apart and then cools to form new oceanic lithosphere. This new material is less dense than the asthenosphere, but cools and ...

Below the lithosphere, but still in the mantle, you will find the asthenosphere - the denser, weaker layer which lies between about 100-400km below the surface of the Earth. The lithosphere and ...

This course deals with the composition and evolution of the crust, lithospheric mantle and asthenosphere. Seismic imaging techniques ... and present state of the continental as well as oceanic ...

Thanks to these studies, we now know the five layers of the atmosphere are the troposphere, stratosphere, mesosphere, thermosphere and exosphere (see graphic). Together, these layers protect us ...