https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/pangaea 2021-05-28T22:26:27Z Pangaea Pangaea - the idea of Pangaea and some of the evidence behind it Sal Khan video https://cdn.kastatic.org/googleusercontent/FyGp0fFikeG_DtVM5vtDuxzlA4H4E9nnAbcZ9fXN55T_THRV_BKVWE7has8t-OGiuCohGRG2DOpHraA2rVupMwhD Pangaea Pangaea - the idea of Pangaea and some of the evidence behind it https://cdn.kastatic.org/ka-youtube-converted/axB6uhEx628.mp4/axB6uhEx628.mp4 358 Continental drift and plate boundaries https://www.khanacademy.org/science/9th-grade-science-matatag/xc6c9cbcd628f26fe:2nd-quarter-earth-and-space-science/xc6c9cbcd628f26fe:continental-drift/a/alfred-wegener-and-harry-hess 2023-05-05T21:01:11.640988085Z READ: Alfred Wegener and Harry Hess article https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/plate-tectonics-geological-features-of-divergent-plate-boundaries 2024-06-21T23:15:14.703721694Z Plate tectonics: Geological features of divergent plate boundaries Divergent plate boundaries, where Earth's plates move apart, create unique geological features. These boundaries result in seafloor spreading, rift valleys, volcanoes, and earthquakes. The process begins with hot magma rising, causing the lithosphere to crack and form rift valleys. Over time, these valleys can fill with water, forming seas. As the land continues to spread, mid-oceanic ridges form, creating an underwater mountain chain. Sal Khan video https://cdn.kastatic.org/googleusercontent/2Jj6UIeCOiIl0cNfy7L9YKyNyp32Sh4Lb7j3Wa11TiaOLm_7hHDVEUSIjY2z1P84wEcW1jZbaPdY8uLwGCK_5iaU Plate tectonics: Geological features of divergent plate boundaries Divergent plate boundaries, where Earth's plates move apart, create unique geological features. These boundaries result in seafloor spreading, rift valleys, volcanoes, and earthquakes. The process begins with hot magma rising, causing the lithosphere to crack and form rift valleys. Over time, these valleys can fill with water, forming seas. As the land continues to spread, mid-oceanic ridges form, creating an underwater mountain chain. https://cdn.kastatic.org/ka-youtube-converted/FK1s1-OJ5BE.mp4/FK1s1-OJ5BE.mp4 718 Continental drift and plate boundaries https://www.khanacademy.org/science/cosmology-and-astronomy/earth-history-topic/plate-techtonics/v/plate-tectonics-geological-features-of-convergent-plate-boundaries 2024-06-21T23:15:14.703721694Z Plate tectonics: Geological features of convergent plate boundaries Plate tectonics involves the movement and interaction of Earth's crustal plates, leading to geological changes. Divergent boundaries create new crust, while convergent boundaries, where plates collide, can form mountains, island arcs, earthquakes, and volcanoes. The subduction of one plate under another can result in deep trenches and underwater volcanoes. Sal Khan video https://cdn.kastatic.org/googleusercontent/l-c8jfg1yB2UuAPYZU0CaNvMX4hnUrMsRV-0_IXRq4RCnvvrJhYUsphGsd5xU1NXile13QTp4_nPDcwH27jvQCcXSA Plate tectonics: Geological features of convergent plate boundaries Plate tectonics involves the movement and interaction of Earth's crustal plates, leading to geological changes. Divergent boundaries create new crust, while convergent boundaries, where plates collide, can form mountains, island arcs, earthquakes, and volcanoes. The subduction of one plate under another can result in deep trenches and underwater volcanoes. https://cdn.kastatic.org/ka-youtube-converted/Y0eWnOZpSpQ.mp4/Y0eWnOZpSpQ.mp4 364 Continental drift and plate boundaries 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/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/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/plates-moving-due-to-convection-in-mantle 2021-04-26T14:33:09Z Plates moving due to convection in mantle Plates Moving Due to Convection in Mantle Sal Khan video https://cdn.kastatic.org/googleusercontent/XtfApQqWCb4gYMsN5dd_rsDxyoZ5Bo4JgU-JKSnolLumkwqgY0lvsZ99aGIQ4dciX_YVRsQBAPVTch54lv4bK20 Plates moving due to convection in mantle Plates Moving Due to Convection in Mantle https://cdn.kastatic.org/ka-youtube-converted/f8GK2oEN-uI.mp4/f8GK2oEN-uI.mp4 362 Continental drift and plate boundaries https://www.khanacademy.org/science/als-k-to-12-science/x46c2fc9f8e023990:3rd-quarter/x46c2fc9f8e023990:using-models-to-explain-how-fault-movements-generate-earthquakes/v/computer-model-of-mantle-convection 2023-11-08T23:44:11.024924004Z Computer Model of Mantle Convection Scientists study mantle convection, or the flow of hot rock in the Earth's deep interior, in order to better understand how this flow shapes the surface of the Earth. When a solid, liquid, or gas is heated, it expands, becomes less dense, and rises. When it cools, it contracts, becomes more dense, and sinks. The circulation that results from hot, rising material and cool, sinking material is known as convection. Convection makes the Earth dynamic. American Museum of Natural History video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Computer Model of Mantle Convection Scientists study mantle convection, or the flow of hot rock in the Earth's deep interior, in order to better understand how this flow shapes the surface of the Earth. When a solid, liquid, or gas is heated, it expands, becomes less dense, and rises. When it cools, it contracts, becomes more dense, and sinks. The circulation that results from hot, rising material and cool, sinking material is known as convection. Convection makes the Earth dynamic. https://cdn.kastatic.org/ka-youtube-converted/OXREZOoNt7M.mp4/OXREZOoNt7M.mp4 430 Continental drift and plate boundaries 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/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