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Forces That Shape the Earth - Free Essay Example

Sample details Pages: 2 Words: 634 Downloads: 1 Date added: 2017/09/25 Category Environment Essay Type Argumentative essay Did you like this example? Plate Tectonics The forces that shape the earth begin beneath the lithosphere. Rock in the asthenosphere is hot enough to flow slowly. Heated rock rises, moves up toward the lithosphere, cools and circulates downward. Riding above this circulation system are the tectonic plates, enormous moving pieces of the earth’s lithosphere. [pic] Plate Movement Tectonic Plates move in four different ways. When tectonic plates come into contact, changes on the earth’s surface occur. 1. Diveregnt Boundary- Plates move apart, spreading horizontally. . Convergent Boundary-Plates collide causing either on plate to dive under the other or the edges of both plates crumple. 3. Transform Boundary- Plates slide past one another. [pic] Folds and Faults When two plates meet each other, they can cause a folding or cracking of the rock. The transformation of the crust by folding or cracking occurs very slowly, often only a few centimeters or inches a year. The rocks, which are under grea t pressure, become more flexible and bend or fold, create changes in the crust. pic] Earthquakes As the plates grind or slip past each other at a fault, the earth shakes or trembles. This sometimes violent movement of the earth is an earthquake. [pic] Volcanoes Magma, Gases and Water from the lower part of the crust or the mantle collect underground chambers. Eventually the materials pour out of a crack into the earth’s surface. Most Volcanoes are found along the tectonic plate boundaries. [pic] Tsunami Some Earthquakes causes a tsunami a giant wave in the ocean. A tsunami can travel from the epicenter of a quake at speeds of up to 450 miles per hour, producing waves of 50 to 100 feet higher, [pic] Weathering Weathering Refers to Physical and Chemical processes that change the characteristics of rock on or near the earth’s surface. Weathering occurs slowly over many years and even centuries. Weathering process create smaller and smaller pieces of rock called sedimen t. [pic] Mechanical Weathering Processes that break rock into smaller pieces. Mechanical weathering doesn’t change the composition of the rock only its size. [pic] Chemical Weathering Chemical Weathering occurs when rock is changed into a new substance as a result in a interaction between elements in the air or water and the minerals in the rock. Decomposition, or breakup, can happen in several ways. [pic] Erosion Erosion occurs when weathered material is moved by the action of wind, water, ice, or gravity. For Erosion to occur, transportation agent, such as water, must be present. Glaciers, waves, stream flow, or blowing winds cause erosion by grinding rock into smaller pieces. [pic] Water Erosion One form of Water Erosion as water flows in a stream or river. The motion picks up the loose material and moves it down stream. The greater the force of water, the greater the ability of water to transport tiny rock particles, or sediment. Another form of erosion is abrasion, the grinding away from rock by transported particles. [pic] Wind Erosion Many Ways Wind Erosion is similar to water erosion because the wind transports and deposits in other locations. Wind Speeds must reach at least 11 miles per hour before fine sediment can be moved. The greater the speed of the wind, the larger the particles move. [pic] Glacial Erosion Glaciers form in mountains areas and in regions that are routinely covered with heavy snowfall and ice. In mountain regions, glaciers move down slope as a result in gravity. Glaciation is the changing of landforms by slowly moving glaciers. [pic] Building Soil Weathering and Erosion are apart the process of forming soil. Soil is the loose mixture of weathered rock, organic matter, air, and water that supports plant growth. Organic matter in the soil helps support the growth of plants by providing needed plant food. Water and Air share tiny pore like spaces in the soil. [pic] Don’t waste time! Our writers will create an original "Forces That Shape the Earth" essay for you Create order

Harriet Tubman Essay - 1405 Words

Harriet Tubman Even before Harriet Tubman was born she had a powerful enemy. Her enemy wasn’t a person or even a country; it was the system known as slavery. It is known that at least two grandparents were captured by slave traders and brought to North America from the Slave Coast of Africa during the 18th century. Because slaves were not allowed to read and write, Tubman grew up illiterate. She left no letters or diaries that would later allow historians to piece together all the parts of her life story. But we do know that she was one of history’s great heroines. With courage and determination, she escaped from slavery herself and then led more than 300 slaves to safety and freedom. When the Civil War began, she tirelessly scouted for†¦show more content†¦Some slave owners separated a mother from her children very soon after she stopped nursing. Sometimes the mother was sold or hired out to live and work on another farm. The law did not recognize the marriages and families of slaves. It was up to the owners if they were considered married or not. As a result, many slave children never knew their parents or their own brothers and sisters. Only during the later years of slavery did most owners try to keep families together. When Araminta was a child, Maryland planters were no longer growing much tobacco. They grew wheat and corn and hoped for better times. The Brodas plantation wasn’t as rich as it had once been. The slaves knew this because many of them were disappearing from the plantations. Some were sold. Others were hired out to people who couldn’t afford to buy their own slaves. Araminta later worked as an apprentice to Mrs. Cook who taught her how to weave. The lint from the weaver’s yarn made Araminta cough and sneeze. She wasn’t at all interested in becoming a weaver and having to sit all day in a workhouse, so she paid little attention to her work. Mrs. Cook later gave up on her, so Mr. Cook decided to try her at another job. So the Brodas decided to give Araminta a job of a babysitter, she was now a scrawny seven-year old who didn’t seem bright enough to follow the simplest instructions. Her master probably thought he was lucky to get anything at all for her.Show MoreRelatedHarriet Tubman Essay2304 Words   |  10 PagesHarriet Tubman By Blake Snider December 5, 2010 Professor J Arrieta Seminar Critical Inquiry Harriet Tubman is a woman of faith and dignity who saved many African American men and women through courage and love for God. One would ponder what would drive someone to bring upon pain and suffering to one’s self just to help others. Harriet Tubman was an African American women that took upon many roles during her time just as abolitionist, humanitarian, and a UnionRead MoreHarriet Tubman Essay586 Words   |  3 PagesHarriet Tubman Harriet Tubman was a very interesting women. Harriet Tubman, was born as Araminta Ross in 1819 or 1820 in Dorchester County, Maryland. Araminta Tubman had changed her name to Harriet after her mother, and Ross of course was after her father. Harriet was born into slavery. There were eight children in her family and she was the sixth. Her mother died when she was only five years old. The first person that ownedRead More Harriet Tubman Essay552 Words   |  3 Pages Harriet Tubman was an important African American who ran away from slavery and guided runaway slaves to the north for years. During the Civil War she served as a scout, spy, and nurse for the United States Army. After that, she worked for the rights of blacks and women. nbsp;nbsp;nbsp;nbsp;nbsp;Harriet Tubman was really named Araminta Ross, but she later adopted her mother’s first name. She was one of eleven children of Harriet Greene and Benjamin Ross. She was five when she worked on a plantationRead MoreHarriet Tubman And The Underground Railroad1510 Words   |  7 PagesThis memoir covers the life of Harriet Tubman who was a slave known for her extraordinary chip away at the Underground Railroad. Harriet Tubman was conceived in Dorchester County, Maryland on March, 1822. This novel discusses how Harriet Tubman had the capacity escape bondage in the south in the year of 1849 and looked for some kind of employment in the north. Particularly in Philadelphia, where she worked in inns to raise enough cash to bolster her needs. She would then migrate to Canada and inRead MoreEssay On Harriet Tubman1602 Words   |  7 PagesHarriet Tubman â€Å"I had reasoned this out in my mind, there was one of two things I had a right to, liberty or death; if I could not have one, I would have the other.† -Tubman The world was blessed with Harriet Tubman in 1822 on the eastern shore of Maryland. Unfortunately, Tubman was born into this world as a slave and lived on a plantation with her family, which consisted of four brothers and four sisters. Her parents named her Araminta â€Å"Minty† Ross but soon, with the coming of age, she changed herRead MoreEssay On Harriet Tubman1771 Words   |  8 PagesHarriet Tubman is well known for a successful role in freeing many slaves through the Underground Railroad. Not many know the major effect she had on the Union Army as a Scout and a spy during the Civil War. Her bravery while helping slaves escape through the Underground Railroad and her assistance in gathering Confederate troops intelligence as a spy changed the history and made a great impact on the on the United States National Defense. Even though Harriet Tubman was a very skillful spy, she hadRead MoreHarriet Tubman And The Underground Railroad1422 Words   |  6 PagesHarriet Tubman The Underground Railroad was a system set up to help escaping slaves safely survive their trip to the north. Harriet Tubman was a leader and one of the best conductors on the Underground Railroad. Harriet Tubman made a total of 19 trips into slave holding states freeing around a total of 300 slaves. Huckleberry Fin was written by Mark Twain, Jim one of the main characters was an escaped slave. Harriet Tubman played a significant role in liberating slaves as she worked as a conductorRead MoreHarriet Tubman And The Underground Railroad832 Words   |  4 PagesHarriet Tubman and the Underground Railroad Harriet Tubman was like a conductor on a train. Running the underground railroad to free innocent slaves from certain neglect. What do people think when they hear the name Harriet Tubman. some might think of her as a dirty black others might call her a hero, or moses. Harriet Tubman was a very brave, and courageous woman. In this paper we will explore the childhood, life of slavery, and how she came to be known as the women called moses. Araminta wasRead MoreThe Ingenious Works Of Harriet Tubman1061 Words   |  5 PagesThe ingenious works of Harriet Tubman, William Still, and Thomas Garrett pushed the abolitionist movement towards success. Due to the torturous conditions of slavery, these three individuals relentlessly worked towards their goal of having the Underground Railroad prosper. Harriet Tubman was one of the main and most well known conductors of the Underground Railroad, she led numerous trips to help deliver slaves to freedom over the course of her adult life. William Still assisted our modern historiansRead MoreSojourner Truth And Harriet Tubman947 Words   |  4 PagesSojourner truth and Harriet Tubman made a huge impact during slavery times. Sojourner Truth and Harriet Tubman were two women who were born into slavery. They both suffered from bad treatment from their owner. Also, they both later in their lives ran away from their enslavement. Sojourner Truth and Harriet Tubman both took part in issue s dealing with civil rights and were abolitionists. They both went different ways in helping other slaves with obtaining their freedom. Sojourner Truth was an abolitionist

Midnight Sun Essay Sample free essay sample

The midnight Sun is a natural phenomenon happening in summer months at topographic points north of the Arctic Circle and South of the Antarctic Circle where the Sun remains seeable at the local midnight. Around the solstice ( June 21 in the North and December 21 in the South ) and given just weather the Sun is seeable for the full 24 hours. The figure of yearss per twelvemonth with possible midnight Sun increases the farther towards either pole 1 goes. Although about defined by the polar circles. in pattern midnight Sun can be seen every bit much as 90 kilometers outside the polar circle. as described below. and the exact latitudes of the farthest ranges of midnight Sun depend on topography and vary somewhat year-to-year. There are no lasting human colonies South of the Antarctic Circle. so the states and districts whose populations experience it are limited to the 1s crossed by the Arctic Circle. e. g. Canada ( Yukon. Northwest Territories. and Nunavut ) . Denmark ( Greenland ) . Finland. Sapmi. Norway. Russia. Sweden. the United States ( Alaska ) . and appendages of Iceland. A one-fourth of Finland’s district lies North of the Arctic Circle and at the country’s northernmost point the Sun does non set at all for 60 yearss during summer. In Svalbard. Norway. the northernmost inhabited part of Europe. there is no sundown from about 19 April to 23 August. The utmost sites are the poles where the Sun can be continuously seeable for a half twelvemonth. The opposite phenomenon. polar dark. occurs in winter when the Sun stays below the skyline throughout the twenty-four hours. Since the axial joust of the Earth is considerable ( about 23 grades 27 proceedingss ) the Sun does non set at high latitudes in ( local ) summer. The continuance of sunlight additions from one twenty-four hours during the summer solstice at the polar circle to several hebdomads merely a 100 kilometers closer to the pole. to six months at the poles. At utmost latitudes. it is normally referred to as polar twenty-four hours. At the poles themselves. the Sun merely rises one time and sets one time each twelvemonth. During the six months when the Sun is above the skyline it spends the yearss continuously traveling around the skyline. making its highest circuit of the sky at the summer solstice. Due to atmospheric refraction and besides because the Sun is a disc instead than a point. the midnight Sun may be experienced at latitudes somewhat below the polar circle. though non transcending one grade ( depending on local conditions ) . For illustration. it is possible to see the midnight Sun in Iceland. even though most of it ( Grimsey being a noteworthy exclusion ) is somewhat south of the Arctic Circle. The same mechanisms do the period of sunshine at the poles to last somewhat more than six months. Even the northern appendages of Scotland ( and those topographic points on similar latitudes such as St. Petersburg ) experience a lasting dusk in the northern sky at these times. Perceivers at highs appreciably above sea degree can see drawn-out periods of midnight Sun as a consequence of the ‘dip’ of the skyline viewed from height.