Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Tectonic Plate Movement - Ms. Gravette and the Mad Scientists
Transcript
Write on the RIGHT Side Tectonic Plate Movement (Pg. 98-99) • There are three ways scientists explain how tectonic plates move: 1. Mantle Convection 2. Ridge Push 3. Slab Pull Mantle Convection • States that as the mantle heats up, the hotter part rises and the cooler part sinks due to convection • As the mantle moves, it drags the tectonic plates with it • Criticism: Does not explain how it would create huge amount of force needed to move tectonic plates Ridge Push • New rock formed at the oceanic ridges rests on top of the old rock due to its density • The older rock slopes down and away from the mid ocean ridge • As the new rock cools, it becomes more dense and responds to gravity • This force pushes the old rock away from the mid ocean ridge Slab Pull • At subduction Zones more dense rock sinks (subducts) beneath less dense plates • As the plate sinks, it pulls the rest of the plate with it • In general, sinking plates move faster than other plates leading scientists to believe slab pull is the most important
