The term "lithosphere" is the scientific name for the Earth's rigid outer layer. There is no alternative scientific name.
The lithosphere encompasses the crust and the uppermost part of the mantle. It is divided into tectonic plates which move and interact, causing earthquakes, volcanic activity, and mountain building. The term itself originates from the Greek words "lithos" (rock) and "sphaira" (sphere). While sometimes the term "geosphere" is used to generally refer to the solid parts of Earth, including rocks and soil, it's not a direct synonym for "lithosphere." The geosphere is a broader term.
Therefore, to reiterate, the scientific name for the lithosphere is lithosphere.
