[Music] hello everyone welcome to another learning episode for science 10. i am teacher leia ronkadu girigay of nabuntura national comprehensive high school nabunturan west district before we start kindly make sure that you have your module 3 at hand as well as your notebook and pen do not forget to have a glass of water with you to keep you hydrated there are three types of plate boundaries as is caused in module two can you name the three types of plate boundaries you're right the three types of plate boundaries are the convergent divergent and transform fault plate boundaries did you know that the zoom simple movement of the plates can bring about geological processes scientists found out that the continents and ocean floors are always moving according to the plate tectonic theory the earth's leave the sphere consists of the crust and the upper mantle that moves slowly and constantly over time most of the time we can't feel it however plate movements can be violent sometimes causing death and destruction on the other hand plate movements can bring about the formation of fascinating landforms this time we are going to understand lesson one of your science module processes and landforms along with the convergence of blades pages 5-7 of your module directed you to perform simulation activities if you haven't done the activity yet you might try this after our conceptual discussion convergence of plates may take place between any of this oceanic and continental plates two oceanic plates and two continental plates again what will happen if plates converge [Music] yes you're right [Music] the convergence of plates produces landforms and made possible the occurrence of some geological processes the conduct of activity 1 on page 5 of your module simulated what happens when oceanic and continental plate will converge the foam that was half soaked in water represented the oceanic plate while the foam which was not soaked in water represented the continental plate as you pushed the two foams toward each other or as they converge the wet foam was forced down while the dry foam curved upward why did it happen can you tell the wet foam which represented the oceanic crust is denser than the dry foam that represented the thicker but less dense continental crust remember when oceanic and continental plates converge the oceanic plate is forced down into the mantle this process is called subduction as the oceanic plate subducts the leading edge of the subducting plate melts or becomes fluid which turns into magma the convergence of this blades formed trenches mountains earthquakes and volcanoes on the sea floor and on land i hope the concept on the convergence between an oceanic and continental crust was clear on page six of your science module activity two you were directed to perform a simulation activity using two pieces of foams submerged in a tray with water the submerged foams represented two oceanic plates as you push the two submerged foams toward each other you are simulating the convergence of two oceanic plates when a convergent boundary occurs between two oceanic plates one of those plates will subduct beneath the other [Music] normally the older plate will subduct because of its higher density the subducting plate is heated as it is forced deeper into the earth's mantle [Music] what will result from the convergence of two oceanic plates can you tell the convergence of two oceanic plates will result a zone of progressively deeper earthquakes the occurrence of tsunami formation of ushanic trench a chain of volcanic island ark and even the destruction of oceanic lithosphere this explains why the philippines is mostly loaded with volcanoes the different islands were believed to have originated from the convergence of two oceanic crests going back to the simulation activity on page 6 activity 3 of your science module you were directed to use two crunchy crackers or two slices of bread whose one third of each piece was soaked with water you were supposed to position them on a flat surface such that the soaked parts touch each other you were instructed to to push them toward each other in this activity you are simulating the convergence of two continental plates so what happens when two continental plates collide converging continental crusts or plates result in a collision zone which would cause shallow earthquakes at that place a crack called fault is formed this type of convergence will cause no subduction since the two plates have the same densities there would be no volcanoes formed nor tsunamis the convergence will result in a group of high land forms that we call mountain ranges let us check your understanding go to page 10 of your module item number 7 eight and nine consider this scenario when two continental crusts converge both crusts exert a pressure pushing each other as the ground rises a tall landform is created item number seven is it possible to erupt you got it right it is not possible the convergence of two continental crusts will result to the formation of mountain ranges like shara madre which extends from the northern part of gagayan to the southern part of quesan province item number eight what process does not take place in this type of convergence that's right subduction does not take place in this type of convergence it is because the two continental plates have the same densities you're progressing well in this lesson now let's proceed to lesson two of your module the processes and landforms along the divergent boundary it may be difficult to imagine the movement of plates because we cannot see them move hence the use of simulations and objects that may exhibit similar features are being utilized let us conceptualize the divergent plate boundary i am sure that you have seen a half cooked boiled egg right the divergence of blades is somewhat like it the white part of the egg is likened to the earth's crust while the half-cooked yolk represented the magma cutting the white part of the egg to allow the yolk to flow out simulated the divergence of plates [Music] divergent plate boundaries are locations where plates are moving away from one another this occurs above rising convection currents the rising current pushes up on the bottom of the lithosphere lifting it and flowing laterally beneath it at the crest of the up leaf the overlying plate is stretched thin breaks and pulls apart let us complete the paragraph in the what i have learned section page 12 of your module divergence of plates result to the creation of dawn faulted valleys called rift valley and underwater mountain ranges called oceanic ridges a detention zone materials from the mantle may rise to the surface of the ocean floor cools down and become new crust you did great a path on your shoulder for the job well done this time we will learn about the processes and landforms along transform fault boundary lesson 3 of your module transform plate boundaries are characterized by plates moving horizontally against each other producing a crack called fault on the ground the force that the plates exert can break the rocks and other materials under the ground therefore it brings about strong earthquakes strong earthquakes do not only destroy properties but it threatens lives as well it is for this reason why we are taught on how to respond appropriately through earthquake drills different places are now designated as evacuation area where people could seek refuge in case of the so-called big one strikes i hope you have recalled the basic response during ground shaking as being practiced in school can you recall the initial response during ground shaking yes you're right carry out the dock cover and hold properly [Music] let us answer the question on page 16 of your module question 14 the word doc in doc cover and hold safety tip means that you must a stand straight b lie down c kneel down on one knee or letter d kneel down on both knees you're right it's letter c kneel down on one knee so that you can get up easily in case there is a need to evacuate question 15 during earthquakes it is advisable to cover once a head b nose c mouth or letter d face it's letter a head remember that an injury in the head is fatal so as an initial response during ground shaking the head should be protected question 16 victims of disasters are provided with their needs by the government at a evacuation centers b event centers c orphanages are letter d tall buildings that's correct victims of disasters are being provided by the government with their needs at the evacuation center good job you did well in our lesson i hope that you will reflect on the concepts and relate them to real life phenomena you may have forgotten the exact terminology but i hope you have grasped the important content that concludes this day's learning session but before we end may i remind you again to wash your hands maintain social distancing eat healthy for us to stay physically and mentally fit stay home and be safe always we're all in this together god bless us all once again this is teacher leia lunchado girigay of nabuntura national comprehensive high school nabunturan west district remember dito sativisquela sapagaral samasama bye you