the atmosphere‚ surrounds our planet. It provides us with the air we breathe‚ and it protects us from the full blast of the sun’s radiation. Way up in the part of the atmosphere‚ called the stratosphere‚ a layer of gas filters out most of the sun’s damaging ultraviolet rays. This layer of gas is called ozone and is located about five miles to 25 miles above the surface of the Earth. (Bright‚ 1991). Only about one-millionth of our atmosphere is made up of ozone. But it has a tremendously important
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How does the atmosphere affect conditions on Earth? What is Earth’s atmosphere composed of? How do pressure and density vary with altitude? What are the characteristics of the major layers of the atmosphere? Important Terms atmosphere air pressure barometer troposphere weather stratosphere ozone layer mesosphere thermosphere ionosphere aurora At 8848 meters (29‚030 feet) above sea level‚ Mount Everest is the highest mountain in the world. In 1952 Edmund Hillary‚ a New Zealand
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The rock cycle is very important to us because it explains the way the different types of rocks are formed on earth. Geologists classify rocks in three groups‚ depending on the Earth processes that made them. Some rocks are formed by heat and pressure. Other rocks are formed by weathering and erosion. The three rock groups are igneous‚ sedimentary‚ and metamorphic rocks. Igneous rocks are formed from melted rock that has cooled and solidified. They can form underground or above ground. Underground
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The seventh layer of the OSI model is the Application layer. b. Protocols in the Transport layer accept data from the Session layer and manage end-to-end delivery of data. c. True or False: The IP (Internet Protocol) operates in the Transport layer. False d. True or False: Standards help to ensure interoperability between software and hardware from different manufacturers. True e. True or False: Standards define maximum acceptable performance. False OSI Layers | Description
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OZONE LAYER The Earth ’s ozone layer protects all life from the sun ’s harmful radiation‚ but human activities have damaged this shield. Less protection from ultraviolet light will‚ over time‚ lead to higher skin cancer and cataract rates and crop damage. The ozone layer is one layer of the stratosphere‚ the second layer of the Earth’s atmosphere. The stratosphere is the mass of protective gases clinging to our planet. Ozone is only a trace gas in the atmosphere only about 3 molecules for every
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Layers of the Atmosphere The envelope of gas surrounding the Earth changes from the ground up. Five distinct layers have been identified using... • thermal characteristics (temperature changes)‚ • chemical composition‚ • movement‚ and • density. Each of the layers are bounded by "pauses" where the greatest changes in thermal characteristics‚ chemical composition‚ movement‚ and density occur. Troposphere The troposphere begins at the Earth’s surface and extends from 4 to 12 miles (6 to 20
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Skin Layers 1. Epidermis The epidermis is the outer most layer of skin. It is built up of 5 layers (from the outside in) - stratum corneum is made of dead flat skin cells - stratum licidum - stratum granulosum - stratum spinosum - stratum basale Where cells divide and push previously formed cells into the upper layers. As the cells travel into the higher layers‚ they flatten and die‚ eventually. Specialized Epidermal Cells - melanocyte - produces pigment (melanin) - Langerhans’
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At a granular level‚ rocks are composed of grains of minerals‚ which‚ in turn‚ are homogeneous solids formed from a chemical compound that is arranged in an orderly manner. The aggregate minerals forming the rock are held together by chemical bonds. The types and abundance of minerals in a rock are determined by the manner in which the rock was formed. Many rocks contain silica (SiO2); a compound of silicon and oxygen that forms 74.3% of the Earth’s crust. This material forms crystals with other
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spray cans. In December of 1973‚ Rowland and Molina discovered that CFCs can destroy The Ozone Layer Ozone layer depletion slows There is good news about the ozone layer above us. The good news about the ozone layer is not always frequent. On International Ozone Day‚ the report came in that the ozone levels have decreased above Montreal and other residents of southern Canada. The ozone layer shields the earth from most of the harmful radiation and light coming from the sun. The ozone reflects
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endings and receptors in the skin Elimination of waste through excretion and secretion of sweat etc. (Harris‚ 2010‚ p. 757) 3. Name the three layers of the skin and give a brief description of each layer. Epidermis- the outermost layer which depending on the body location has several layers. The stratum coreum which is thinnest outermost layer consisting of dead keratinized cells protect underlying cells and tissue from dehydration and stop entry of certain chemicals agents. The stratum basale
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