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Tectonic plate theory essay
Tectonic plate theory essay
Volcano essaysvolcanic eruption
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Nature’s Fury: Volcanoes
Volcanoes are one of the most terrifying and spine-chilling natural calamities that is known to mankind. It is a constant reminder of the fearsome power of Mother Nature.
A volcano is a mountain with an opening at its tip and contains molten rock known as lava. Volcanoes erupt when the pressure within the volcanic mountains increases. Hot gases, fragments of rock, soil are all thrown out due to the pressure. Lava and rock fragments spill over and the air fills with smoke. The lava, ash, and noxious gases are released at a high temperature in the range of 2,100°F (1,150°C). Avalanches, mudslides, hot ash flows, lava flows are all common disasters which follow a volcanic eruption. Volcano eruptions have in the past destroyed
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Sometimes this magma slowly works it’s way towards the upper surface of earth. Internal pressure builds up and results into a volcanic eruption. As the volcano erupts, ash and lava get deposited everywhere. The lava cools slowly being a poor conductor of heat. The lava continues to flow in its liquid state, however once it cools down, it hardens and remains stuck to the underlying soil or rocks.
There is a theory called ‘plate tectonics’. This theory explains that, the earth surface consists of numerous plates which fit with each other like pieces of a jigsaw puzzle. These plates tend to move at times. This movement is strong enough to trigger a volcanic eruption or an earth quake near the edge of the
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Why do volcanoes erupt?
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4. What are the different types of volcanoes?
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II. Join the following sentences to create one sentence without altering the meaning.
1. An active volcano is a volcano that has had at least one eruption during the past 10,000 years. An active volcano might be erupting or dormant.
2. A volcano is a mountain with an opening at its tip. Volcanoes contain a pool of molten rock below the surface of the earth.
3. With typical waves, water flows in circles. With a tsunami, water flows straight.
III. Learn the phrases and their meanings.
Phrases Meanings eagle eyes someone who sees or notices things easily like two peas in a pod similar in appearance bag of bones extremely thin in the blink of an eye very quickly the apple of your eye very precious
Now fill in the blanks using the idioms given
Earthquakes are a natural part of the Earth’s evolution. Scientific evidence leads many geologists to believe that all of the land on Earth was at one point in time connected. Because of plate tectonic movements or earthquakes, continental drift occurred separating the one massive piece of land in to the seven major continents today. Further evidence supports this theory, starting with the Mid-Atlantic ridge, a large mass of plate tectonics, which are increasing the size of the Atlantic Ocean while shrinking the Pacific. Some scientists believe that the major plate moveme...
Basalt forms due to the partial melting of the layer of the mantle called the asthenosphere. The asthenosphere is the plastic zone of the mantle beneath the rigid lithosphere. Mantle plumes coming from the mesosphere can cause the asthenosphere to melt with heat or even if pressure decreases, which is called decompression melting (Richard 2011). The magma that forms from this melting is mafic magma that solidifies once it reaches the earth’s surface and cools quickly. The above process mainly occurs mainly during intraplate igneous activity which is the main explanation for volcanic activity that occurs a long distance away from a plate boundary. If the tectonic plate above the mantle plume is moving it can create a string of volcanic activity such as in Hawaii. See Fig 2.
Volcanoes have always been a mysterious wonder of the world. Volcanoes have shaped the landscape and the very ground that we all live on. People have written stories of their disastrous eruptions, and painted their marvelous shapes on canvas. The essay will outline some of the more famous volcanoes and how they have impacted are history. Mount Vesuvius that destroy the great city of Pompeii, Krakatoa they spewed deadly ash on small village town, and Mount St. Helen, the only volcano in my own country to every erupt during my own time period.
Stories about volcanoes are captivating. Myths come in different versions, but all of them are capable of capturing yours, and everybody’s imagination.
Volcanoes can be very deadly but the location can also determine that. Zones are what tells people how dangerous they are. In document c it explains each zone. There are five zones by one being the harshest zone and five being the safe zone. People live in all zones and that's not good at all. Documents C says " There is an area around an active event where likelihood to be killed is extremely high." Volcanoes are always capable of surprises and never up to something good.
The Mauna Loa volcano is located in Hawaii and means "Long Mountain" in Hawaiian. It is a giant, basaltic shield volcano. It is one of the largest volcanoes and mountains in the world and has been called the "monarch of mountains". It has an estimated volume of 9,600 cubic miles and takes up half the land of Hawaii. It extends about 120 km starting from the southern tip of the island to the northern region. It is 97 km (60 miles) long, 48 km (30 miles) wide, and is 8,742 km (28,680 miles) high from the base on the sea floor to the top. The slopes are steeper than 12 degrees and about 4 degrees at the top of the volcano. Mauna Loa formed about half a million years ago and in the middle stages of forming into a shield volcano where lava flows to form a sloped and broad flat domed volcanic cone. Along with Mauna Kea, the Mauna Loa volcano is responsible for the creation of the Hawaiian Islands. Mauna Loa has erupted thirty-three times since 1843 and is known as one of the most active volcanoes in the world today. The last eruption was 1984 and lava flowed within 4 miles of the city of Hilo. This shows that it is dangerous to live anywhere near Mauna Loa and that it poses as a threat to anyone living near it because it has a very high possibility of erupting within a very short span of time. Below is a picture of Mauna Loa taken from a bird's eye view.
Volcanoes obtain their energy from such movement and pressure. Volcanoes form at the boundaries of these plates where two types of movement occur: two plates will collide with each other, or the plates will move apart from each other. Some of these plate layers are cooled and are made up of rigid rocks. The effects on the landscape are lava that releases onto the Earth's surface. When that lava comes to the Earth's surface, it is red hot, and sometimes the temperature is more than 2012 degrees Fahrenheit.
Super volcanoes are formed when magma rises from the mantle to create a scorching reservoir in the Earth's
Magma is a hot liquid made of melted minerals. Minerals can form crystals when they are cool. Igneous rock can form underground, where the magma cools. slowly. Or, igneous rock can form above ground, where the magma cools.
Volcanoes are one of natures most interesting and dangerous phenomenons. The way volcanoes operate can be understood, on a basic level, by just some simple physics and chemistry, this paper will investigate and explain some of the basic physics that govern the behavior of volcanoes.
Features Volcanoes release large amounts of energy from beneath the lithosphere, (Earth's crust and upper part of the mantle) and asthenosphere, (semi-molten mantle). During volcanic eruptions molten rock or magma rises up from the asthenosphere towards the surface as it's propelled by gases surrounding it. Some eruptions can occur through cracks in the Earth's surface called fissures. As magma reaches the surface, it's called lava. Common features o... ...
Igneous rocks are formed from the ejection of earth’s volcanoes. Deep down inside earth’s mantle there lies hot magma. Magma is molten rock that is kept below the surface. This mixture is usually made up of four parts: a hot liquid substance which is called the melt; minerals that have been crystallized by the melt; solid rocks that have made themselves tangled in the melt because of loose materials, and finally gases that have become liquid. Magma is created by an increase in temperatures, pressure change, and a alter in composition. When this magma is ejected from earth’s crust it earns a new name called lava. The lava hardens and becomes an Igneous rock.
The interior structure of the earth is made up of crust, the mantle and core (inner core and outer core). Earthquakes occur on the crust. Crust forms the external layer of the earth surface. On the crust, the plate tectonics forces are in charge of causing the abrupt earth movements. Due to the existence of an immense temperature and concurrent pressure difference in the outer layer and inner layer of the earth, convection currents occur at the mantle. This energy results from overwhelming decomposition of radioactive substances contained by the rocks found at the interior of the earth. The developed convection currents lead to movement of lava; cold lava finds its way to the interior of the earth crust, while the molten lava which is generally hot, leaves the interior of the earth to the outside of the earth crust. These kinds of circulations occur at different locations of the earth surface and consequently results in segmentation of the earth due to movement in different directions.
The earliest outcropping volcanic deposits date back to about 25,000 years ago. The lavas observed at a -1125 m bore-hole are about 0,3-0,5 million years old. It is known for the first eruption of which an eyewitness account is preserved, in 79 AD. Geologically, Vesuvio is unique for its unusual versatility. Its activity ranging from Hawaiian-style release of liquid lava, fountaining and lava lakes, over Strombolian and Vulcanian activity to violently explosive, plinian events that produce pyroclastic flows and surges.