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  1. 28 Απρ 2020 · Seafloor spreading helps create mid-ocean ridges, giant underwater mountain ranges that develop where tectonic activity is driving plates apart from each other. This lovely map highlights where tectonic plates are separating at mid-ocean ridges.

  2. 28 Απρ 2020 · This science lesson plan aims to teach 10th grade students about seafloor spreading through various classroom activities. Students will learn how seafloor spreading happens, how drill samples provided evidence of spreading, and the lines of evidence that support plate tectonics theory.

  3. 30 Ιουν 2012 · 1. The document discusses sea-floor spreading, which is the process where new oceanic crust forms at mid-ocean ridges as tectonic plates move away from each other. 2. Evidence that supports sea-floor spreading includes magnetic stripe patterns in the ocean floor and samples from ocean crust that show it is younger near ridges and older further ...

  4. Plate Tectonics and Seafloor Spreading - ppt download. Published by Marlene Henry Modified over 5 years ago. Embed. Download presentation. Presentation on theme: "Plate Tectonics and Seafloor Spreading"— Presentation transcript: 1 Plate Tectonics and Seafloor Spreading. 2 Discovery of Subsea mountain ranges.

  5. Rift valleys provide insight into the processes of seafloor spreading, the characteristics of plate boundaries, and the mechanisms driving plate motion, as they exemplify how tectonic activity shapes the Earth's surface.

  6. 1) Harry Hess proposed the theory of sea floor spreading in 1962, which suggested that new ocean crust is formed at mid-ocean ridges as tectonic plates move away from each other. 2) Evidence for sea floor spreading includes the flat abyssal plains on the ocean floor and magnetic striping patterns in ocean crust that indicate alternating ...

  7. 26 Αυγ 2015 · By combining the sea floor spreading theory with continental drift and information on global seismicity, the new theory of Plate Tectonics became a coherent theory to explain crustal movements. Plates are composed of lithosphere, about 100 km thick, that "float" on the ductile asthenosphere.