https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/structure-of-the-earth 2021-04-26T14:33:09Z Structure of the earth Structure of the Earth - crust, mantle, core Sal Khan video https://cdn.kastatic.org/googleusercontent/ozhNh79o7_IVg6IqpuKAMT4UDbW7Zxv4l7nou5mnROu6-3SOusY09cd0eOopptqM6utpcVPkbOpwPxC7Fk0ygwGGyw Structure of the earth Structure of the Earth - crust, mantle, core https://cdn.kastatic.org/ka-youtube-converted/4AxZ-6MOznY.mp4/4AxZ-6MOznY.mp4 573 Continental crust and oceanic crust https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/compositional-and-mechanical-layers-of-the-earth 2024-12-18T15:07:32.868904839Z Compositional and mechanical layers of the earth The crust is the outermost layer of Earth and is composed of solid rock. The lithosphere contains the crust and upper mantle. The mantle is the thickest layer and is made up of hot, mostly solid rock. The core is divided into two parts: the inner core and outer core. The inner core is solid and the outer core is liquid. Sal Khan video https://cdn.kastatic.org/googleusercontent/uVJeKygXh_meaGbmYVnz4o990MaLry8bphlGY-OCroNQqk1HwxlkqLpkHMiW37KT4E7yApsUnlwp72kuOgh68HQ Compositional and mechanical layers of the earth The crust is the outermost layer of Earth and is composed of solid rock. The lithosphere contains the crust and upper mantle. The mantle is the thickest layer and is made up of hot, mostly solid rock. The core is divided into two parts: the inner core and outer core. The inner core is solid and the outer core is liquid. https://cdn.kastatic.org/ka-youtube-converted/hHteUIS0OFY.mp4/hHteUIS0OFY.mp4 710 Continental crust and oceanic crust https://www.khanacademy.org/science/strengthened-shs-earth-and-space-science-1/x006d5d274c051fd7:origin-and-structure-of-the-earth/x006d5d274c051fd7:inside-the-earth/e/quiz-plate-tectonics 2026-04-02T16:36:17.676962277Z Quiz: Plate Tectonics American Museum of Natural History exercise https://www.khanacademy.org/science/grade-6-science-tx/x6eddf2e1c524bf5a:earth-s-systems-and-structure/x6eddf2e1c524bf5a:earth-s-layers/e/understand-earths-layers 2026-06-30T17:20:49.845080165Z Understand: Earth's layers Check your understanding of Earth's layers in this set of free, standards-aligned practice questions. Allen Ruch exercise