Preview

history

Powerful Essays
Open Document
Open Document
1103 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
history
Questions 14-17
Reading Passage 162 has four sections A-D
Choose the correct heading for the each section from the list of headings below.
Write the correct number i-vi in boxes 14-17 on your answer sheet.
___________________________________
List of Headings i Causes of volcanic eruption ii Efforts to predict volcanic eruption iii Volcanoes and the features of our planet iv Different types of volcanic eruption v International relief efforts vi The unpredictability of volcanic eruption
___________________________________
14 Section A
15 Section B
16 Section C
17 Section D

Volcanoes – earth-shattering news
When Mount Pinatubo suddenly erupted on 9 June 1991, the power of volcanoes past and present again hit the headlines

A Volcanoes are the ultimate earth-moving machinery. A violent eruption can blow the top few kilometres off a mountain, scatter fine ash practically all over the globe and hurt rock fragments into the stratosphere to darken the skies a continent away.

But the classic eruption – cone-shaped mountain, big bang, mushroom cloud and surges of molten lava – is only a tiny part of a global story.
Volcanism, the name given to volcanic processes, really has shaped the world.
Eruptions have rifted continents, raised mountain chains, constructed islands and shaped the topography of the earth. The entire ocean floor has a basement of volcanic basalt. Volcanoes have not only made the continents, they are also thought to have made the world’s first stable atmosphere and pro vided all the water for the oceans, rivers and icecaps. There are now about 600 active volcanoes. Every year they add two or three cubic kilometres of rock to the continents. Imagine a similar number of volcanoes smoking away for the last 3,500 million years. That is enough rock to explain the continental crust.
What comes out of volcanic craters is mostly gas. More than 90% of this gas is water vapour from the deep earth: enough to explain, over 3,500

You May Also Find These Documents Helpful

  • Better Essays

    Anth 368

    • 1944 Words
    • 8 Pages

    The earth’s crust is made out of plate tectonics. Each plate has a defined boundary and direction it moves. The plates in Earth’s crust perform two actions; they submerge under each other or they spread out. The Pacific Plate is the largest plate and it borders around many plates. The Pacific Plate moves northwest. New crust is formed from magma outpours, which are a result of the zones spreading. The tectonic plates created the islands. When the tectonic plates move, it creates the change in geography. Active volcanoes together shape the way islands are build. The magma from the volcano and the deposits from the plate are needed to create the pacific islands structure. The buildup of deposits eventually pushes pass sea level to create the island. The islands that are part of the same volcanic chain will all take over a millions years to rise.…

    • 1944 Words
    • 8 Pages
    Better Essays
  • Powerful Essays

    ‘Evaluate how plate tectonics theory helps our understanding of the distribution of seismic and volcanic events’…

    • 1204 Words
    • 3 Pages
    Powerful Essays
  • Satisfactory Essays

    How did volcanoes affect the origins of the seas? Water vapor is one of the many gasses released during volcanic eruptions. The water in the oceans primarily originated from the condensation and precipitation of water vapor that had been out-gassed by volcanic eruptions over the 3-4 billions of years of Earth's geologic history. (yahoo answers)…

    • 284 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    Now this is a story all about how two volcanoes erupted and destroyed three towns. This will take a while so just sit right there while I tell you all about the blast and the ash-filled air. On the west coast of Italy sat Pompeii, when August 24 advanced their way. No one was prepared for what happened that day. When the blast occurred, they all began to pray. When the sky began to fall, most of them tried to flee, but some of the others thought differently. The ones that remained were killed almost instantly. All of their deaths were caused by the ash and the burning hot air. Far into the future on Mount St. Helens, everything within eight miles turned into ruins. When an earthquake triggered the volcano that morning, nearly twenty-two hundred…

    • 894 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    01.06

    • 258 Words
    • 1 Page

    2. During a volcanic eruption tons of gasses are released including water vapor. One of the main contributors to where some of the oceans originated from was caused by water vapor. After the volcanic eruption water condenses into the air causing precipitation (ex. Rain or snow) Giving back to the ocean making volcanoes the oceans main contributor.…

    • 258 Words
    • 1 Page
    Satisfactory Essays
  • Good Essays

    A volcano is a mountain with a vent at the top where magma and gasses…

    • 631 Words
    • 3 Pages
    Good Essays
  • Good Essays

    (2012). Volcanoes and Volcanic Hazards. In Essentials of Geology (11th ed., p. 104, 105). Upper Saddle River, New Jersey: Pearson Prentice Hall.…

    • 395 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Plate tectonics essay

    • 1162 Words
    • 4 Pages

    Firstly, one place where tectonic activity occurs is at oceanic to oceanic constructive plate boundaries. Here two plates diverge or move away from each other, pushed apart by huge convection currents In the earth’s mantle. These convection currents are initiated by heat energy produced from radioactive decay in the earth’s core. As the convection currents move the plates away from each other, there is a weaker zone in the crust and an increase in heat near the surface. The hotter, expanded crust forms a ridge. Magma rises up from the mantle in the gap. The lava cools, solidifies and forms a chain of volcanic mountains thousands of miles long down the middle of the ocean eg. Atlantic. There are transform faults at right angles to the ridge. The movement of these faults causes rift valleys to occur. Examples of these landforms created by constructive plate margins are the Mid Atlantic Ridge (MIR) , and the Great African rift valley (GARV). The MIR is the result of the North American plate and Eurasian plate diverging in the middle of the Atlantic ocean. Here, volcanic islands such as Iceland, the Canary islands and ascension island have been created by the rising magma from the mantle. The GARV is an example of where the crust has dropped down between parallel faults to form rift valleys. As the crust subducts into the mantle it melts causing igneous activity below, magma to rise and therefore volcanoes erupt on the surface as a result. Evidence of this volcanic activity is shown by Mount Kenya and Mount Kilimanjaro.…

    • 1162 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Explain Why Iceland Exist

    • 703 Words
    • 3 Pages

    This is because of a huge underwater volcano. It was caused by volcanic magma erupting from the sea floor in the construction plate, the Mid-Atlantic Ridge. Iceland has the greatest concentrations of volcanoes in the world. It has 130 volcanic mountains. Some of them are greater and more famous than the others. Most of them are situated on the Mid-Atlantic Ridge but some of them are on the fracture zones (Zones caused by pressure of the plates and are part of the constructive plate boundaries and destructive plate…

    • 703 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Mount Edna

    • 880 Words
    • 4 Pages

    Mount Etna is one of the most active volcanoes in the world and is in an almost constant state of activity. Due to its history of recent activity and nearby population, Mount Etna has been designated a Decade Volcano by the United Nations.…

    • 880 Words
    • 4 Pages
    Good Essays
  • Good Essays

    Volcanic Eruption Paper

    • 757 Words
    • 4 Pages

    It is intriguing to me that scientists and researchers possess the technology to observe and study events that happen on the depths of the ocean floor. This topic relates to the Geology 307 class in various ways. The first of which is plate tectonics. The eruptions of the volcano are a result of plates shifting causing magma to build under the ocean floor. Earthquakes also cause the volcanoes to erupt. Submarine volcanoes also affect the movement of sediment and plankton through the ocean. Submarine volcanism’s importance lies in its ability to change the physical landscape of the ocean floor as well as the contents in the…

    • 757 Words
    • 4 Pages
    Good Essays
  • Powerful Essays

    Volcano model

    • 1352 Words
    • 5 Pages

    Volcanoes are one of the earth's most amazing displays of power. Volcanoes are the earth's mechanism for cooling off its inner core. As the core of the planet heats up from the decay of radioactive elements deep in the earth, the rocks melt, forming magma. This heat needs to be released and allowed to escape to the surface. An eruption hole, or vent, is created through which burning hot molten rock and gases are released to the surface of the earth. The build-up of the ashes and lava flows (magma that has been released from the earth) that are released around the hole accumulate to create a volcano. These happen most often at "hot spots", which are places along the edges of earth plates that are weak enough to allow the earth to vent hot lava. The study of movement at these plates that creates super geologic activity is called plate tectonics.…

    • 1352 Words
    • 5 Pages
    Powerful Essays
  • Good Essays

    Touching the Void

    • 485 Words
    • 2 Pages

    3) Volcanoes gave out gases: CO2, water vapour and small amounts of other gases. (water and oceans formed)…

    • 485 Words
    • 2 Pages
    Good Essays
  • Good Essays

    Sedimentary rock actually originates from the disposition of the sediments after they are moved by the movement of plates. The climate controls how sediments are moved and how the rock weather. After weathering and erosion has occurred the sediments stop moving and settle. Where they settle is known as their disposition.…

    • 874 Words
    • 4 Pages
    Good Essays
  • Satisfactory Essays

    `Hey

    • 451 Words
    • 2 Pages

    In producing chemicals volcanoes help Through sulfur deposits, chemicals are made In making hot springs that can cure diseases Volcanoes really help. VI. Volcanoes cause us harm; yes, this is true But from them we can benefit too…

    • 451 Words
    • 2 Pages
    Satisfactory Essays

Related Topics