PPT-EROSION, HUMAN IMPACT

ON THE LITHOSPHERE EARTH SCIENCE UNIT 11 Mechanical Weathering Weathering Mechanical weathering occurs when physical forces break rock into smaller and smaller pieces without changing the rocks mineral composition . Methods of soil conservation (ch3). The key aspects discussed in this chapter are:. Windbreaks. Contour ploughing. Stubble planting. Terraces. Stone walls. Reduce farming in dry weather. Windbreaks. Reforestation. . How are coasts shaped by physical processes? . You have been given a key word with a definition on it. . You must quiz one person to define the key term. . Congratulate them on a correct definition or correct their response. . Essential. . Questions. :. How does human activity affect the soil on the Earth’s surface?. How can humans conserve our soil? . Standards. S6E5i. Explain the effects of human activity on the erosion of the earth’s surface.. Jon D. Pelletier, . University of Arizona. Hillslope-fluvia. l geomorphologists. have . often . taken climate change. . to be . synonymous . with changes . in runoff/discharge/precipitation (i.e., driving shear stresses). . Rivers have become regular features in the news. In any given year, one or more rivers become notorious for their devastating floods. But for most of the time, rivers are very useful – they provide people with their livelihoods, a place to live near and are a great source of recreation and leisure. Learning to live and cope with rivers would seem to be of increasing importance. And yet, many human activities seem to make the river environment, and the human use of it, more hazardous. Is it possible for humans to live harmoniously with rivers, while benefit from them at the same time?. Human impact on the environment. In this lesson you will learn about:. the biological control of pest species. the use of GM crops as an alternative to using fertilisers and pesticides. Success criteria. another.. 2 . kinds:. 1) . Rill erosion. is the erosion by running water in small channels. , on the side of a slope.. 2) . Gully erosion. is when a rill channel evolves to become deep and wide.. By the end of this section you will be able..... To name and explain the causes of soil erosion.. Describe in detail how human activities can cause soil erosion.. Name and explain the primary methods of soil conservation.. . (“Flow-Assisted”. . or “Flow-Accelerated”. . Corrosion). An increase in corrosion brought about by a high relative velocity between the corrosive environment and the surface.. Removal of the metal may be:. Human impact on the environment. The impact of human activities and environmental health sometimes needs to be monitored.. This could be measuring abiotic factors such as O. 2. levels, pollution or by sampling of organisms.. On a notecard:. Identify units of erosion measurement in Figure A. Convert the average erosion rate into mm/yr.. Figure A: Determine which regions in the United States have the highest continental erosion rates . DSE3T : Factor, Processes and Mitigation Soil Erosion Soil is the most precious gift of nature - Prime resource - for food, fodder etc. for food, fodder etc. It is the earth’s fragile covering t Permanent Representative of the Kingdom of Morocco to the United nations and International Organizations in Vienna. Embassy of the Kingdom of Morocco to the United Nations and International Organizations in Vienna. 2. Technology has changed the business world many times over.. . In the Information Age, the advent of computers and the Internet has increased that impact significantly. . Introduction. 3. Many businesses cannot even function without the use of...