https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:the-geosphere/x87d03b443efbea0a:plate-tectonics/v/plate-tectonics-the-ocean-floor 2023-08-04T18:39:03.474124137Z Plate tectonics and the ocean floor In the ocean, tectonic processes continuously create and destroy oceanic crust. When tectonic plates collide, denser plates dive under less dense ones, creating trenches and mountains. New sea floor is constantly created as plates move apart, keeping Earth from shrinking. Khan Academy video https://cdn.kastatic.org/ka_thumbnails_cache/2bcaf09d-698c-45c9-8327-728e783b2d73_1280_720_base.png Plate tectonics and the ocean floor In the ocean, tectonic processes continuously create and destroy oceanic crust. When tectonic plates collide, denser plates dive under less dense ones, creating trenches and mountains. New sea floor is constantly created as plates move apart, keeping Earth from shrinking. https://cdn.kastatic.org/ka-youtube-converted/A98wPKiPMJw.mp4/A98wPKiPMJw.mp4 241 Lithospheric plates https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:the-geosphere/x87d03b443efbea0a:plate-tectonics/a/plate-tectonics-the-ocean-floor 2026-04-27T10:10:46.754795089Z Key points: Plate tectonics and the ocean floor Review your understanding of plate tectonics and the ocean floor in this free article aligned to NGSS standards. article https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/plate-tectonics-difference-between-crust-and-lithosphere 2021-04-26T14:33:09Z Plate tectonics: Difference between crust and lithosphere Plate Tectonics Introduction and Difference between crust and lithosphere Sal Khan video https://cdn.kastatic.org/googleusercontent/VNj_oqSTrvroCIftP0JPwZpMKnIYwsvyWn7IG8AF4S4-ySiRxBjbx-_KPssvvg99OB_f0HBWmCEqr9aldNRIcnms Plate tectonics: Difference between crust and lithosphere Plate Tectonics Introduction and Difference between crust and lithosphere https://cdn.kastatic.org/ka-youtube-converted/f2BWsPVN7c4.mp4/f2BWsPVN7c4.mp4 479 Lithospheric plates https://www.khanacademy.org/humanities/oer-project-big-history/xc3079f0f2dd307e4:unit-2/xc3079f0f2dd307e4:earth-2-6/a/slideshow-earths-tectonic-plates 2025-08-13T00:49:52.439041008Z Earth's Tectonic Plates article https://www.khanacademy.org/humanities/oer-project-big-history/xc3079f0f2dd307e4:unit-2/xc3079f0f2dd307e4:earth-2-6/a/article-plate-tectonics-continents-in-motion 2025-08-13T00:49:52.439041008Z Plate Tectonics: Continents in Motion It took decades for people to accept the theory of plate tectonics. Why did it take so long and what evidence do we have to support this theory? article https://www.khanacademy.org/science/strengthened-shs-earth-and-space-science-1/x006d5d274c051fd7:origin-and-structure-of-the-earth/x006d5d274c051fd7:inside-the-earth/a/plates-on-the-move 2025-03-07T16:50:49.734868403Z Plates on the Move article https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:earth-systems-and-resources/x0b0e430a38ebd23f:plate-tectonics/e/plate-tectonics 2021-07-31T01:12:35.280321966Z Plate tectonics Apply your understanding of plate tectonics in this set of free practice questions aligned to AP standards. exercise 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/middle-school-earth-and-space-science/x87d03b443efbea0a:the-geosphere/x87d03b443efbea0a:plate-tectonics/e/understand-plate-tectonics 2026-04-27T10:30:47.716252349Z Understand: Plate tectonics Check your understanding of plate tectonics in this set of free practice questions aligned to NGSS standards. Lauren Rosebrugh exercise https://www.khanacademy.org/science/middle-school-earth-and-space-science/x87d03b443efbea0a:the-geosphere/x87d03b443efbea0a:plate-tectonics/e/apply-plate-tectonics 2026-04-27T10:30:47.716252349Z Apply: Plate tectonics Apply your understanding of plate tectonics in this set of free practice questions aligned to NGSS standards. Lauren Rosebrugh exercise https://www.khanacademy.org/science/10th-grade-melcs/x1cfbe2e54160ac98:1st-quarter/x1cfbe2e54160ac98:plate-boundaries/e/quiz--why-is-plate-tectonics-important- 2025-07-05T01:17:12.100326604Z Quiz: Why Is Plate Tectonics Important? Quiz 4.2 Jay Heins exercise