PLATE TECTONIC THEORY | Volcanoes, Earthquakes, Mountain Ranges| Grade 10 Science Quarter 1 Module 1

0:00 hello students it's been a while welcome back to my estang Tei YouTube channel shout out to all greaten students thank you so much for watching this video Lesson and without further Ado let's start learning today we are going to discuss quarter 1 week one lesson volcanoes earthquakes and mountain ranges at the end of this video Lesson you are expected to describe and relate the distribution of active volcanoes earthquake epicenters and major mountain belts to play tectonic Fury so what you're waiting for please keep on [Music]

0:51 watching how would you describe Earth you might say it's big and strong or that it's covered with land and water it has many different features like mountains and volcanoes but do you know how these features are formed or how they relate to where earthquakes happen this lesson will give you easy to understand information that will help you learn about PL tectonics and how volcanoes earthquakes and mountains are connected do you remember in your grade 8 or grade n science lessons that are our country is part of the Pacific Ring of Fire that's why we often experience earthquakes and we are home to many

1:37 Majestic but terriable volcanoes earth is made up of four layers the crust montle outer core and inner core there are two main types of Earth's crust namely the continental crust and the oceanic crust when we say continental crust it is part of the crust that forms the continents on the other hand when we say oceanic crust it is the part of the crust under the oceans moreover continental crust is thick it is like a thick blanket about 30 to 50 km deep and it makes up land masses like continents on the other hand

2:23 oceanic crust is thinner like a thin layer about 5 to 10 kilm deep it's made of denser rocks and generally younger than the continental crust in addition to that it forms the Ocean Floors in short class continental crust is thick and old forming the land we live on while oceanic crust is thinner and younger forming the Ocean Floors now let's have the lithosphere which is the outermost layer it includes the crust or the surface layer and the upper part of the mantle or the layer below the crust the lios spere is not a single solid

3:10 piece instead it's broken into several large and small pieces called tectonic plates they say that the Earth is secretly broken into large pieces like a cracked eggshell these are called tectonic plates these tectonic plates are always moving but very slowly they can move apart push together or slide past each other this movement is caused by the heat inside the earth which creates currents in the mantle that push the plates around when plates interact they can cause different geological features and events such as mountains when plates collide they can push up and form

3:57 mountain ranges when one plate div under another it can create volcanoes and this process is called subduction when plates slide past each other or Collide they can cause earthquakes in summary class plate tectonics is the process that drives the movement of Earth's plates shaping the planet surface and causing geological events now look at this map the yellow triangles are the places where you can find active volcanoes the red green and blue circles show earthquakes that happened several years ago I have here another map that shows mountain ranges major volcanoes and earthquake zones

4:44 what did You observe about the pictures did you find the earthquake epicenters volcanoes and mountain ranges Clos to each other or if not situated in the same locations yes right right they are the same or close to each other plate movements can cause earthquakes which can happen both on land and Under the Sea on land earthquakes can be triggered by the movement of tectonic plates or by volcanic eruptions underwater earthquakes can lead to tsunamis the Philippines is located in the region where plate tectonics is very active it is known as the ring of fire this is a long chain of volcanoes and other tectonic activ ity around the Pacific

5:31 Ocean the ring of fire is one of the most geologically active places on the Earth leading to the frequent earthquakes and strong volcanic eruptions the Philippines is located in a very tectonically active region due to its position at the intersection of the several major tectonic plates here are some of the tectonic plates affecting the Philippines first we have the Philippine Sea plate it is located in the east of the Philippine Sea and it causes many earthquakes and volcanoes in the country we also have the uran plate it is located at the northwest of the Philippines it interacts with the Philippine Sea plate leading to geological activity in the region we also have the Pacific Plate located

6:18 further east beyond the Philippine Sea plate it also influences the earthquakes and volcanic activity of the Philippines and lastly we have the Sund Plate located at the southwest of the Philippines it affects the southern part of the Philippines contributing to some volcanic and earthquake activity in summary the Philippines is influenced by the movements of the Philippine Sea Ural late Pacific Plate and Su of flate these interactions create a highly active geological environment leading to frequent earthquakes and volcanic activity now let's sum up all of our discussion today help me choose the correct answer in this paragraph let's go the cross and a part of the upper

7:04 mantle make up the leosphere it is subdivided into portion called plates plates are large pieces of the upper few hundred kmet of Earth that move as a single unit as it moves above the mantle next there are two kinds of crust first is the continental plates which which are thicker but less dense and oceanic plates which are ther but denser that's correct next plate tectonics is a fury which suggests that the Earth's cross is made up of plates that constantly move and interact in various

7:50 ways thus producing earthquakes mountains volcanoes and other geologic features that's correct next the plate that pushes the Philippine plate toward the Eurasian plate is the Pacific Plate the world's earthquakes volcanoes and mountain ranges are not randomly distributed over the Earth's surface they are both situated at the same location very good near the edges of the continents that's right and and lastly geologic activities such as seismicity or the occurrence of

8:36 earthquake volcanism and Mountain formations are the basis of scientists in dividing Earth's leosphere and that's it for our video Lesson for today I hope you learned something new watch out our next video Lesson where I will discuss about plate boundaries that's it see you again next time [Music]