3 Layers of the Earth Essay

Submitted By nico_segrera

Words: 455

Pages: 2

Open Document

The Core: At the center of the Earth is the core. Its upper boundary is approximately 1,800 miles (2,900 km) below the surface. The core is predominately formed of iron (85 %) and nickel (5 %) with a number of siderophile (iron liking elements forming the remainder). It is divided into two layers based on the cores state of matter, the inner core and the outer core. The inner core which is at the very center of the Earth is a solid layer approximately 780 miles (1,250 km) thick. The core is at a very high temperature and so the outer core is always molten, however as the depth within the core increase the pressure drives the melting temperature up above the in-situ temperatures even though they reach 6700ºF (3700ºC). The outer core is approximately 1370 miles (2,200 km) thick. It is thought that the movement of the liquid outer core is responsible for the creation of earth's magnetic field.

The Mantle: The mantle lies directly above the core (this boundary is known as the core-mantle-boundary or Gutenberg discontinuity and is named after the geophysicist who discovered it (trivia - Beano Gutenberg, the geophysicist in question also worked with Charles Richter in the development of the Richter magnitude scale). Its upper boundary lies approximately 6 miles (10 km) below the surface of the oceanic crust and about 19 miles (30 km) below the surface of the continental crust. The mantle is broadly divided into two main sections. The upper and the lower mantle based on changes in the crystalline structure of the mantle material caused by pressure changes at increasing depths. The mantle is approximately 1,800 miles (2,900 km) thick and makes up nearly 80 percent of the Earth's

Essay about Global Warming

ozone layer Introduction: The ozone layer is a layer in the earth's atmosphere containing relatively high concentrations of ozone. Global warming is climate change that causes an increase in the average temperature of the lower atmosphere. I believe there is a relationship between ozone layer and global warming. The following are some reasons there is a relationship between global warming, damage of the ozone layer and the temperature increase on earth. Causing A. the thinning of ozone layer I…

Words 789 - Pages 4

Dreams: Different Sedimentary Layers Essay

9.1 How do we infer the relative ages of events? Principle 1: Most sediment is deposited in horizontal layers. Principle 2: A younger sedimentary or volcanic unit is deposited on top of older units. Principle 3: A younger sediment or rock can contain pieces of an older rock. Principle 4: A younger rock or feature can cut across any older rock or feature. Principle 5: Younger rocks and features can cause change along their contacts with older rocks. 9.2 How do we study ages of landscape?…

Words 1621 - Pages 7

Essay On Geothermal Energy

stored in the outer shell of solid earth. It’s clean,sustainable,endless and environmentally friendly. This thermal energy is contained in the rock and fluids beneath Earth's crust. It can be found from shallow ground to several miles below the surface, and even farther down to the extremely hot molten rock called magma. Geothermal energy is used in many applications ,such as ( to produce electricity,heat buildings,greenhouses,for industrial and other purposes ). Earth contains in its interior ,a furnace…

Words 1339 - Pages 6

Essay Atmosphere Web Quest

Atmosphere Web Quest http://www.vtaide.com/png/atmosphere.htm http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Atmosphere.shtml 1. What are the four main layers of the atmosphere? 2. Which layer is closest to space? 3. Which layer is the hottest layer? 4. Which layer is the coldest layer? 5. What and where are the ionosphere and exosphere? 6. Draw a picture of the atmosphere…….write at least two important facts about each sphere. (Scale your drawing. Make sure you pay…

Words 336 - Pages 2

Global Systems And Solar Energy

solar energy enters the tree. Closed Systems Allows energy but not matter to cross the systems boundaries, for example: the earth; solar energy enters the atmosphere radiant energy is given off. Isolated Systems Neither matter nor energy cross the boundary, for example; the universe is the only true isolated system. Earth as a System Boundary of Earth is the atmosphere. Solar energy enters the atmosphere. Some energy is reflected and some energy is absorbed. Some of the energy…

Words 568 - Pages 3

Essay about Lab Experiment 3 Families Of Elements

LABORATORY REPORT Experiment 3 Families of Elements Name: RAYSA M DOMINGUEZ Date: February 25, 2015 Lab Partner’s Name: T. GRIFFIN Score: _________________ I. Introduction An elements is a substance made entirely by one atom. According to the modern periodic law elements are arranged accordingly to increasing atomic number. Elements in the periodic table on the horizontal row are called periods and elements in vertical columns are called groups. The main objective of this…

Words 1482 - Pages 6

Geology Study Guide

depth of about 100 km and in some regions extends as deep as 700 km. The rock within this zone is easily deformed. * Hypothesis – A tentative explanation that is then tested to determine if it is valid. * Mantle – One of Earth’s compositional layers. The solid rocky shell that extends from the base of the crust to a depth of 2900 km. * Open system – A system in which both matter and energy flow into and out of the system. Most natural systems are of this type. * Closed system – A system…

Words 2223 - Pages 9

plate tectonics Essay

Ch. 3 Outline *a key to the curious puzzle was found 50 years earlier by Alfred Wegener, a busy German meteorologist and polar explorer -in 1912 he proposed a theory called continental drift; he suggested all Earth’s land had once been in a single supercontinent surrounded by ocean -he called the land mass Pangaea (pan/”all”; gaea/”Earth, land”) and the surrounding ocean Panthalassa (thalassa/”ocean”) *although he wasn’t first to assemble the continents using geology + geometry…

Words 3335 - Pages 14

Ceres Research Paper

dominates Dawn’s orbit at Ceres, scientist can measure the variations in the gravity by recording the slight changes in the motion of the spacecraft. The date is measured by recording radio signals sent to the spacecraft, and then received back on Earth by NASA’s Deep Space Network. The Network is made up of large antennas at multiple locations around the world. Ceres’s special property called hydrostatic equilibrium is the source used to confirm the weak interior of this dwarf planet. To explain…

Words 582 - Pages 3

Essay on Science Review

and the biosphere. 1. An organism is any form of life. The cell is the basic unit of life in organisms. 2. Organisms are classified as either eukaryotic or prokaryotic based on the presence or absence of a membrane-bound nucleus. 3. Organisms are classified into species, which group organisms similar to each other together. 4. Sexually reproducing organisms are classified as a species if, under natural conditions, they can potentially breed with one another and produce live…

Words 3024 - Pages 13