Definition: Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
Input: The layers scientists recognize are pictured below (Figure 1.1). Core, mantle, and crust are divisions based on composition: 1. The crust is less than 1% of Earth by mass. The two types are oceanic crust and continental crust.Continental crust is felsic and oceanic crust is mafic. 2. The mantle is hot, ultramafic rock. It represents about 68% of Earths mass. 3. The core is mostly iron metal. The core makes up about 31% of the Earth. Lithosphere and asthenosphere are divisions based on mechanical properties: 1. The lithosphere is composed of both the crust and the portion of the upper mantle and behaves as a brittle, rigid solid. 2. The asthenosphere is partially molten upper mantle material and behaves plastically and can flow. A cross section of Earth showing the fol- lowing layers: (1) crust (2) mantle (3a) outer core (3b) inner core (4) lithosphere (5) asthenosphere (6) outer core (7) inner core. Click image to the left or use the URL below. URL: Click image to the left or use the URL below. URL:
