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How does land change? Natural vs. Man-made causes

This Prezi should be used to show students how their Prezi should look for this unit project.
by

Jamie Knight

on 9 October 2012

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Transcript of How does land change? Natural vs. Man-made causes

OUR CHANGING EARTH Earth is a dynamic and ever-changing planet. To understand why Earth changes one must know how man changes the land and how natural forces change the land. Volcanoes are vents on the Earth's surface where molten rock, debris, and gases from the planet's interior are emitted. Earthquakes are a sudden movement of the earth's crust caused by the release of stress accumulated along geologic faults or by volcanic activity. This Prezi is designed to show how land changes as a cause of natural changes in the Earth as well as man-made changes in the Earth. By understanding change, we can understand our world. Humans use the Earth to maintain and sustain our needs, lifestyles, and financial gain. As human population grows humans use the environment more, thus creating man-made forces to change the Earth. Natural forces changing the land is all a result of many processes reacting and interacting with one another. Whether the forces are very large or very small, they are happening every day. Erosion is the gradual wearing away of rock or soil by physical breakdown, chemical solution, and transportation of material, as caused by water, wind, or ice. Weathering is the disintegration and decomposition of rocks and minerals by natural processes such as the action of frost or percolating ground water. Agriculture is the science, art, and business of cultivating soil, producing crops, and raising livestock; farming. Mining is the process or business of removing minerals from the ground. Pollution is the action of polluting especially by environmental contamination with man-made waste. Construction is the act or process of constructing: the building of something, especially a large structure such as a house, road, or bridge. Harvesting is the process or period of gathering in crops; collecting or obtaining a resource for future use. Landforms are natural features of landscape:
a natural physical feature of the Earth's surface, a valley, mountain, or plain. Bodies of water are places where water accumulates to the point that it is a distinct feature of the land. Soil is the top layer of most of the Earth's land surface, consisting of the unconsolidated products of rock erosion and organic decay, along with bacteria and fungi. Vegetation is plants in general or the mass of plants growing in a particular place. Recycling is saving for reprocessing: the saving or collection of used or waste material for reprocessing. Reusing is the use of something again, often for a different purpose and usually as an alternative to throwing it out. Conserving is to protect something from harm or decay: to keep something, especially an important environmental or cultural resource, from harm, loss, change, or decay. In 1985, a volcano in Columbia erupted resulting in 20,000 people dead. Because of the eruptions, four towns in the Andes region were buried, the worst being Armero. Nevado del Ruiz, known locally as "the Sleeping Lion", had not erupted for nearly 150 years. This eruption was the second most deadly eruption in the 20th century. Nevado del Ruiz remained active for several more years, resulting in eruptions in 1991 and 1992.
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