The Earth The earth is a solid sphere. It is made up of three concentric spheres or layers. These are called the core, the mantle, and the crust. The solid sphere is surrounded by a gaseous sphere, which is called the atmosphere. We know most about the crust of the Earth which is the outermost sphere. This layer is very thin compared with the diameter of the whole Earth. It is only about 10 km thick under the ocean and about 30 km thick on land. It consists of rock which contains a lot of minerals. These are usually in compounds called oxides, containing oxygen, or sulfides, containing sulfur. The mantle is much thicker than the crust. It is about 30 km thick. It consists mainly of rocks, but we do not know much about their composition. The core, which is situated inside the mantle, seems to be divided into two parts. The inner core is about 2800 km in diameter. We believe that it is mainly composed of iron, but it also contains about 10% nickel. The layer surrounding the inner core is called the outer core and is approximately 2000 km thick. It is probably composed of molten iron and nickel. However, the metals in the inner core seem to be rigid, and therefore solid. This is because they are under very high pressure, which causes solidification in spite of the high temperatures at the center of the Earth.
The Mantle makes up 70% of the Earth’s mass and is mostly solid but capable of flow, causing changes in the Earth’s surface.
in circumference. The outer few miles of lithosphere is made up of rock called crust.
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.
Knowledge of the internal structure section of the earth's crust and the outer part of the Earth's atmosphere; because the lava issued from this level, a depth of about 450 kilometers.
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.
comes up in a crack in the Earth’s crust, it does not come to the surface, but
Core/Interior: The Earth has three layers to it's interior, the inner core, outer core, and mantle. Of these the outer core is thought to be liquid. Like most of the terrestrial planets at birth, the Earth has been molten and undergone some differentiation allowing the heavy material which is consisting mostly of an iron, nickel, and cobalt core making it's density five and a half times the density of water.
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.
For quite some time, life on earth has been nothing but peaches and cream for several people and because of people who live a non-sustainable life, it has left others with an indistinct outlook on earth’s future. Sustainability to me is doing things that will help prevent harmful things from happening to the environment now and in the future. With the support of the sustainability and more quality ways of living, the Earth Charter is gradually introduced. Through key research I will explain what the Earth Charter is and why it was founded, describe one of its four parts along with the goals and overarching philosophy, and share the impact it has on my life now and in the future.
The lithosphere is an open system, which contains all of the cold, hard, solid rock of the planet's crust (surface), the hot semi-solid rock that lies underneath the crust, the hot liquid rock near the center of the planet, and the solid iron core (center) of the planet (Answers.com). On Earth, the lithosphere comprises the crust and the upper part of the mantle. The lithosphere is about sixty miles thick (Lenkeit).
The Earth is a home for mankind, a planet sustaining life, and it is also a giant magnet! Magnets in general, no matter what type of magnet it is, have two end faces called poles. Poles are where the magnetic force is most effective. These two poles are known as the north pole and the south pole. Magnets also create a magnetic field from the particles within the magnet. The Earth resembles this same structure. The earth has a geographic north pole and a geographic south pole. Since opposites attract in magnets the south pole of the core of the earth points towards the geographic north pole of the earth and the north pole points towards the geographic south pole of the earth. The core of the earth serves the same purpose as the particles in m...
Earth's crust is phosphorus), it is an essential nutrient for all life forms on our planet.
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.
Earth system refers to the earths interacting physical, biological, and chemical processes. The system consists of land, oceans, atmosphere and poles. The earth system has four spheres, including the geosphere, the hydrosphere, the atmosphere, and the biosphere. The geosphere refers to the solid parts of the earth system, including earth’s rocky crust, mantle, and the metallic core. Within the geosphere is the lithosphere, which only refers to the uppermost layers of solid earth. The uppermost layers of solid earth are the oceanic and continental crust rocks. Just below the crust is the mantle, which is composed mostly of magnesium and iron silicate minerals. The mantle accounts for about 2/3 of the