1. Transform Boundaries — Grinding Plates. The Earth's tectonic plates comprise two kinds of crust: continental and oceanic. Become a part of our community of millions and ask any question that you do not find in our Plate Tectonics Q&A library. Learning Objectives n Students will describe the motion of tectonic plates. The subducting plate is heated as it is forced deeper into the mantle, and at a depth of about 100 miles (150 km) the plate begins to melt. A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. (convergent boundaries.) What occurs on Earth when two tectonic plates of roughly equal density collide head-on? This is when two tectonic plates move toward each other and collide. One plate eventually slides beneath the other, a process known as subduction.The subduction zone can be defined by a plane where many earthquakes occur, called the Wadati–Benioff zone. For example, the Pacific plate is currently drifting north-westwards by 6cm per year. ... the different densities of the oceanic and crustal plates . 0 1. busterwasmycat. a ridge. Plate tectonics is a theory of geology.It explains movement of the Earth's lithosphere: this is the earth's crust and the upper part of the mantle.The lithosphere is divided into plates, some of which are very large and can be entire continents.. Heat from the mantle is the source of energy driving plate tectonics. convection currents in the asthenosphere. It is possible to have the collision of two oceanic plates, an oceanic plate and a continental plate or two continental plates. Tectonic plates move at rates that vary from less than 6 feet per 100 years to 66 feet per 100 years (1.83–20.1 m/100 years); and these rates may have been faster in the ancient past. The Red Sea marks a boundary between two tectonic plates that are moving apart. At an average rate of 33 feet per 100 years (about 10 cm/year), a tectonic plate can … For example, take two bars of clay, put them both in a table and push them towards each other. The accurate word for ‘land plates’ ‘is continental crust. plates of equal and plates of unequal densities), give an example of each and a location where each has occurred. answer choices . The result depends on the type of plates involved. When two continental plates collide neither plate can be subducted due to their high bouyancy. Which of the following could form at the plate boundary? Two tectonic plates of different densities collide. When two tectonic plates of different density collide, the denser one subducts under the more buoyant plate. The two towels represent two different tectonic plates. When two continental plates collide, the crust is forced to thicken, creating mountain ranges such as the Himalayas. Each one is unique because of the density of the plates involved. - 15317370 Name three agents of each. The surface is pushed upwards like the Himalayas. convergent boundaries. transform boundary. When Plates Collide Focus Plate Tectonics – Movement of plates, results of plate movement, and the Chile Triple Junction Grade Level 5-6 (Physical Science) Focus Question How do tectonic plates move, and what are the consequences of these movements? Significant differences in the composition and density of continental vs. oceanic plates help explain tectonic processes and the overall layout of our planet's surface. With this type of collision there are no features such as a subduction zone, trench or acretionary wedge. Plate convergence: In places where two plates move towards each other, elongated collision zones build up. 2. 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