Layers of the earth
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The document summarizes the different layers that make up the Earth's structure. It describes the crust, mantle, and core in 3-4 sentences each. The crust is the topmost solid rock layer that makes up 0.5% of the Earth's mass. Below is the mantle, which is thicker and denser than the crust and comprises 10% of the Earth's mass. The innermost layer is the core, which is primarily composed of iron and nickel and can be divided into a solid inner core and liquid outer core.
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Knowing our Earths structure
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Internal Structure of The Earth
Physical Layering
Determining the Earth's Internal Structure
C. The Earth's Internal Layered Structure and Composition
D. VELOCITY AND DENSITY VARIATION WITHIN THE EARTH
The immense amount of heat energy released from gravitational energy and from the decay of radioactive elements melted the entire planet, and it is still cooling off today. Denser materials like iron (Fe) sank into the core of the Earth, while lighter silicates (Si), other oxygen (O) compounds, and water rose near the surface.
The earth is divided into four main layers: the inner core, outer core, mantle, and crust. The core is composed mostly of iron (Fe) and is so hot that the outer core is molten, with about 10% sulphur (S). The inner core is under such extreme pressure that it remains solid. Most of the Earth's mass is in the mantle, which is composed of iron (Fe), magnesium (Mg), aluminum (Al), silicon (Si), and oxygen (O) silicate compounds. At over 1000 degrees C, the mantle is solid but can deform slowly in a plastic manner. The crust is much thinner than any of the other layers, and is composed of the least dense potassium (K), calcium (Ca) and sodium (Na) aluminum-silicate minerals. Being relatively cold, the crust is rocky and brittle, so it can fracture in earthquakes.
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The document describes the internal structure of the Earth. It is comprised of several concentric layers from the crust on the outside to the inner core at the center. The crust and upper mantle make up the lithosphere which is broken into tectonic plates. Beneath the lithosphere is the asthenosphere which is hot and plastic allowing the tectonic plates to move via convection currents in the mantle. Driving and resisting forces influence plate motions. Evidence like matching continents and fossil/rock similarities support plate tectonics theory. The mantle comprises most of the Earth's volume and transfers heat via convection currents. The outer core is liquid while the solid inner core is extremely hot. Boundaries between layers are markedCopy of Continental crusEarth and life science layers ot.pptx
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Earth and life science layers of earth [resentationCrust core and mantle
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The document summarizes the structure and composition of the Earth's main layers. It discusses that the Earth has an inner core, outer core, mantle, and crust. The crust varies in thickness and composition, with continental crust being thicker than oceanic crust. The mantle, made of solid hot rock, transfers heat via conduction and convection. The core is dense metal, mostly iron, and produces Earth's magnetic field through convection in the liquid outer core. Scientists determine this structure through geophysical surveys, seismic data, and properties of meteorites.3 layer of the earth and description
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The Earth is composed of three main layers: the crust, mantle, and core. The crust is the thin, outermost layer that makes up only 1% of the Earth's mass and contains the continents and ocean basins. Below the crust lies the mantle, a dense, hot layer of semi-solid rock that is approximately 2,900 km thick and drives plate tectonics. The Earth's core is the innermost layer and makes up nearly one third of the planet's mass, consisting of a liquid outer core and solid inner core made of iron and nickel.Recently uploaded (20)
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Layers of the earth
- 2. The crust of the earth is very slowly growing thicker. Volcanic activity is continually adding mass to the crust. Though the crust is solid it is.
- 3. The crust is about 0.5 % of the earths total mass. The crust is made up of silicate rocks such as granite and basalt.
- 5. Oceanic crust - The crust under the oceans is about 10 km thick and is generally made up of rock rich in iron and magnesium. These are primarily basalt formed by volcanic action at the mid ocean ridges. The oceanic crust is denser than continental crust.
- 6. Continental crust (continental cratons) - Where there are continents the crust is about 30 to 50 km thick. It is made up of igneous, metamorphic, and sedimentary rocks. The continental crust is less dense than the oceanic crust.
- 8. Largest layers of the Earth. Much less is known about the mantle than the crust. The crust we can see, measure, dig and drill. The mantle is different. We have little direct contact with the inner earth. We can tell some things about the mantle by studying volcanoes and what comes out of them.
- 11. Is made up of rocks rich in magnesium and iron. It is about 400 km thick and is much denser than the crust. It comprise 10% of the earths mass
- 13. It is more dense and contains a greater amount of iron than the upper mantle It is about 1900 km thick It makes up 41% of the earths mass
- 15. The core is composed primarily of a nickel- iron alloy. There is an outer core that is liquid and an inner core that is solid.
- 18. Inner and Outer core
- 19. Outer core is about 2100 km thick. It makes up about 30 % of the Earth's total mass.
- 20. Inner core is about 1300 km thick. It makes up about 2 % of the Earth's total mass.