How do the earth's tectonic plates move?The main driving force of plate tectonics tectonid gravity. If a plate how do tectonic plates move oceanic lithosphere meets another plate, the dense oceanic lithosphere dives beneath the other plate and sinks into the mantle: The sinking oceanic lithosphere drags the rest of the tectonic plate: Oceanic lithosphere is therefore pulled apart in several directions: However, convection is also driving plate tectonics.
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Plate Tectonics What Is an Earthquake? Where Do Earthquakes Happen? Why Do Earthquakes Happen? Geology How Do Plates Move? It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down.
As the cooled material sinks down, it is warmed and rises again. Just like convection cells, plates have warmer, thinner parts that are more likely to rise, and colder, denser parts that are more likely to sink. New parts of a plate rise because they are warm and the plate is thin. As hot magma rises to the surface at spreading ridges and forms new crust , the new crust pushes the rest of a plate out of its way. This is called ridge push. Old parts of a plate are likely to sink down into the mantle at subduction zones because they are colder and thicker than the warm mantle material underneath them.
This is called slab pull. Shop Windows to the Universe Science Store! Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game! Game Check out our online store - minerals, fossils, books, activities, jewelry, and household items! This picture shows how the rigid outer layer of the Earth, This process is called subduction. Volcanic ash particles are less than 2 mm in size and can be much smaller.
Volcanic ash forms in several ways They usually are created of eruptions from a single opening, Lava flows tend to cool quickly and flow slowly. It moves in a pattern called a convection cell that forms when Two types of features can form when plates move apart. At mid ocean ridges, the bottom of the sea splits apart and new crust is Become a member Member Benefits, No Ads. Global Learning and Observations to Benefit the Environment.
Frameworks Scientists in Schools. Shop Windows to the Universe Young Voices for the Planet DVD in our online store includes 8 films where students speak out and take action on climate change. This image is a cross section through the Earth showing the convection cells of the mantle. Ridge push happens at spreading centers where plates are moving apart.
Slab pull happens at subduction zones where one plate is pulled down into the mantle. Windows Original after Northcott. Join Today - Benefits, No Ads! Special Offers for Teachers. You might also be interested in: Plate Tectonics The main force that shapes our planet's surface over long amounts of time is the movement of Earth's outer layer by the process of plate tectonics.
Subduction When two sections of the Earth's crust collide, one slab of crust can be forced back down into the deeper regions of the Earth, as shown in this diagram. Volcanic Ash Ash is made of millions of tiny fragments of rock and glass formed during a volcanic eruption. Cinder Cones Cinder cones are simple volcanoes which have a bowl-shaped crater at the summit and only grow to about a thousand feet, the size of a hill.
Flowing Lava Lava can move in broad flat lava flows, or it can move through tight channels or tubes. How Do Plates Move? Clues to Plate Movements Many kinds of surface features are clues that our lithosphere is sliding. Please log in Username: Science Blogs Real Climate: NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects.
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