* The lithosphere is the rigid, outermost layer of the Earth.

* It is made up of the crust and upper mantle.

* The lithosphere is divided into tectonic plates.

* Tectonic plates move around on the Earth's surface, causing earthquakes and volcanic eruptions.

Asthenosphere

* The asthenosphere is the layer of the Earth's mantle that is located beneath the lithosphere.

* It is made up of mostly solid rock that is under high pressure and temperature.

* The asthenosphere is where tectonic plates move around.

Mesosphere

* The mesosphere is the layer of the Earth's mantle that is located beneath the asthenosphere.

* It is made up of solid rock that is under very high pressure and temperature.

* The mesosphere is where the Earth's heat is generated.

Lower mantle

* The lower mantle is the layer of the Earth's mantle that is located beneath the mesosphere.

* It is made up of solid rock that is under extremely high pressure and temperature.

* The lower mantle is the most stable layer of the Earth's mantle.