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volley ball test
Quiz by Serenity Drago
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volleyball testVolleyball 2nd Summative TestVolly ballA. The continental plate remains above, while the oceanic plate subducts. The older and denser oceanic plate subducts beneath the younger plate. A subduction is the process by which an oceanic plate slide under a less dense plate, can be a continental or another oceanic plate. In this process, the plates involved are oceanic plate and continental plate. Oceanic Plate is thinner plate, Dense,generally, slides under into the mantle; and especially when it is older than the other oceanic plate. They may slide over given that it is the younger oceanic plate in the oceanic-oceanic subduction. In case of oceanic-continental subduction, even younger oceanic plate can never slide over it. Continental Plate is thicker plate, less dense and slides over and experiences compression and volcanic activity. Another concept is about buoyancy. Consider the Earth’s mantle as a giant swimming pool. Floating on top of it are the Earth's tectonic plates—some thin and dense, like the oceanic crust, and others thick and less dense, like the continental crust. Imagine the thin oceanic plate and the thick continental crusts are like tennis ball and soccer ball, respectively. When placed in water, the tennis ball sinks at the bottom and easily subducted as it is smaller and denser. Contrary, the soccer ball is larger and more buoyant, thus, resists subduction and tends to stay afloat. Therefore, during subduction, the thin and dense oceanic crust or an older oceanic crust slide under another plate due to its low buoyancy. Consequently, the thick and denser continental plate or younger oceanic plate slides over because of its high buoyancy. In the subduction zone, there are two landforms that are formed in the process, namely, trench and volcanic arcs. Trenches are deep valleys formed at the edges of the colliding plates, where an oceanic plate bends downward and starts to subduct another plate. It looks like a long, narrow depression where marks the zone where subduction begins. The other landform is the volcanic arc, a chain of volcanoes that formed on the overriding plates where water and sediments from the sinking slab cause the mantle wedge above it to melt, making the magma rise to the surface and forming the volcanoes. a. The formation of trench When these two plates collide, the oceanic plate is subducted and pulled into the mantle. The edges of the plates create a deep valley which we call trench. b. Formation of volcanic arcs When a denser oceanic plate collides with a less dense continental plate, oceanic plate is subducted and pulled into the mantle. As it reaches the mantle, the plate is subjected to extremely high pressure and temperature. This causes the trapped water and air in the plate to be released. The plate eventually melted back as magma. The formed magma rises to the surface. This gives rise to the formation of volcanic arcs. The same is true between the collision of two oceanic crusts as the older crust is subducted over the younger crust. However, the collision of two continental crusts will not result in the formation of trenches. Volleyball KnowlegeVolleyball is a very energetic and dynamic sport all about teamwork and cooperation. There are 6 people on each team playing on court, with the positions of 3 people in the front, covering the net, 3 people at the back, the one in the right corner is the server.Volleyball Volleyball rules