life‚ or drastic change to the environment. 2. Extensively defined as any tragic event stemming from events such as earthquakes‚ floods‚ catastrophic accidents‚ fires‚ or explosions. It is a phenomenon that disasters can cause damage to life‚ property and destroy the economic‚ social and cultural life of people. Types Of Natural Disaster? 1. Avalanches 2. Earthquakes 3. Volcanic Eruption 4. Tornado 5. Storms Avalanches 1. An avalanche (also called a snow slide or snow
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GEO REVISION LAST YEAR Includes: Volcanoes Earthquakes Rocks Mining Weathering VOLCANOES Litos: Rock Structure of the earth Core (magma 6000c) Mantle (magma 3000c) Crust Magma in the mantle moves because the upper mantle contains heavy magma‚ which is less hot‚ it goes downwards and the lower mantle contains light magma because it is very hot and goes upwards so it moves in a circle‚ which is called CONVECTION CELL. Plates on the crust are not statistic because they are so
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many differences between the two volcanoes and their eruptions they also have a lot in common. These are some ways they are alike and different. Both volcanoes have a lot in common. For example‚ there both stratovolcanoes. A stratovolcano is one of the deadliest type of volcanoes because they make toxic gasses and also make pyroclastic flow. Also‚ both volcanoes preceded by tremors‚which are small earthquakes . Also‚ they both had giant ash clouds over the two volcanoes when they erupted.In addition
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that would take measurements of the sea floor. It was at this time that Dr. Hess discovered features on the floor of the ocean that appeared to be mountains with the tops flattened.(called guyouts) Ewig invented explosion seismology (study of earthquakes ) ⦁ Through working together their developments enabled the theory of plate tectonics. In 1953‚ Maurice Ewing and Bruce Heezen discovered the Great Global Rift and inspired Hess to re-examine the data that he collected while at sea. History of
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PHYSICAL ENVIRONMENT Philippines: Pearl of Orient “The Philippines is a country of many names. Maniolas - named by Claudius Ptolemy Ma-I or Mayi – Chinese Traders Archipelago of Saint Lazarus – Ferdinand Magellan Islands of East‚ Islands of the west – European Writers Philippine – Given by Rey Lopez De Villalobos in Honor of Prince Philip II : King of Spain Pearl of Orient Seas – the most romantic named given by the Spanish Jesuit Origin of the Philippines Location: The Philippines lies in Southeast
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Volcanic and seismic events are major pieces of evidence towards proving that the plate tectonics theory is valid. The theory of tectonic plates was first posed by Alfred Wenger in 1912. Is the theory of how the earth lithosphere is made up of many separate pieces of the earth’s crust known as tectonic plates. He put forward the idea that all the earth’s continents were once conjoined in one supercontinent called Pangaea‚ and that these continents were moved by convection currents over a period
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differences between the material erupted by these volcanoes. Volcanic eruptions are caused by a red-hot liquid rock‚ called magma inside the earth’s core. Volcanoes erupt when magma rises to the surface of the earth‚ which causes bubbles of gas to appear in it. This gas can cause pressure to build up in the mountain‚ and it eventually explodes. When the magma bursts out of the earth‚ it is called lava. The type of magma in the earth can create different volcanoes. If the magma is quite thin‚ the gas can
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How volcanoes and Earthquakes are formed- Part 1- an introduction to the moving earth PART 1: 1. Review from your 7th grade lessons the layers of the earth‚ from the following website. http://volcano.oregonstate.edu/vwdocs/vwlessons/lessons/Earths_layers/Earths_layers2.html Label the picture below showing which layer is which. Then answer the following questions. QUESTIONS 1. Which layer is the densest? 2. Which layer has the ability to flow? PART 2: 2. Here you will answer the question:
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This is because it recognises the importance of magma rising up from the mantle to create new crustal rock. The boundary between two converging plates is known as a destructive plate margin‚ as it is responsible for more violent seismic activity‚ volcanoes and high mountain ranges. Destructive Plate Margins Destructive plate margins can either result in collision zones or subduction zones. When a plate of oceanic lithosphere comes into contact with a continental plate the oceanic plate is subducted
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erupts it produces many threats. Some of these threats are lava flows‚ falling ash‚ and they may even cause other threats like mud and debris flows‚ or they can cause the climate to change which may lead to tsunamis or earthquakes. A volcano can cause many horrible things like earthquakes. They can cause mud slides. Mud slides are very powerful. They can destroy cities. Here in the Philippines‚ when Mount Pinatubo erupted the whole place was covered in mud flow and ashes fall. During the eruption some
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