group of islands and is rich in bodies of water such as the oceans‚ rivers‚ and lakes. However‚ according to the data released by Water Environment Partnership in Asia (WEPA) in 2005‚ 42.89% of the waters in the Philippines are contaminated. These contaminated waters have not only been continuously harming people‚ but also the aquatic ecosystem of the country. It is said that approximately 31 percent of illness monitored for a 5-year period were caused by water borne sources. Moreover‚ more and more
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preservation‚ and in the last century for lowering the freezing point of water(History of Salt). In pure water 0 degrees celsius is the normal freezing point of water. Ice will melt just as fast the water will freeze. You won’t see the melting and freezing processes as long as they are balanced and equal. Adding salt or any foreign substance to the water upsets the fragile equality between freezing and melting. Less of the water molecules reach the surface of the ice in an amount of given time. The
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Water Resource Challenges Freshwater Resource Challenge | Description | Surface water | Precipitation that remains on the surface of the land and does not seep down through the soil. | groundwater | The supply of fresh water under Earth’s surface that is stored in underground aquifers | runoff | The movement of fresh water from precipitation and snowmelt to rivers‚ lakes‚ wetlands‚ and‚ ultimately‚ the ocean. | Ocean Water Resource Challenge | Description | Sewage Contents | Fisherman
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Osmosis and water potential Aim of the experiment: Finding the water potential of potato. Biological principles: Independent variable: concentration of the solution. Dependent variable: percentage changed in weight of the potato strips. Controlled variable: size of the potato strips‚ it can be controlled by cutting the length of the strips. Procedure: Table 1. Concentration of sucrose solution table Concentration/ M | Sucrose Solution/ ml | Distilled Water/ ml |
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HYDROSPHERE We all know that water occupies 75% of the Earth’s surface. Water is a component of living cells and every cell in a living organism is made up of almost 75% water and this let the cell to function normally. Life would not exist without water. Water gives habitat meaning the hydrosphere gives a significant place for many animals and plants to exist. Water takes a long time to heat up and it also takes a long time to cool down. This is important in helping to control temperatures
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Why this is no longer a perfect date 12/8/2007 Aaron Gonzalez Materials and Methods Nikon Compound Microscope Glass Microscope slides Cover Slips Paper Towels Thermometer Glass Jar pH Strips I took the sample pond water from the library pond (Central Michigan University)‚ thinking well during mock rock this year I want to know really what I am swimming in. So I took a jar then scooped it up from the muskiest part of the pond. After collecting the sample we placed
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NANOTECHNOLOGY IN WATER PURIFICATION Introduction Nanotechnology is the manipulation of matter on a near-atomic scale to produce new structures‚ materials‚ and devices. This technology has the ability to transform many industries and to be applied in many ways to areas ranging from medicine to manufacturing. Research in nanoscale technologies is growing rapidly worldwide In the case of nanoscale materials‚ the uncertainties are great because the characteristics of nanoscle materials may be different
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POTABLE WATER SUPPLY FOR SUSTAINABLE DEVELOPMENT OF NIGERIAN CITIES‚ TOWNS AND URBAN CENTRES – A CASE STUDY OF AUCHI‚ EDO STATE. BY 1 2 3 4 FADELE .S .O.‚ USMAN .D. D.‚ ELAMAH .D.‚ EBUBE .O. C. (1‚2‚3‚ & 4) DEPARTMENT OF BUILDING TECHNOLOGY AUCHI POLYTECHNIC AUCHI EDO STATE ACCESS TO POTABLE WATER SUPPLY FOR
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solution in water? (A: 0.767 mol NH3) 5. How many liters of water are required to prepare a solution of 7.25 M MgCl2 from 4.89 moles of MgCl2? (A: 0.674 L) 6. What is the molarity of a solution prepared by adding 58.5 g of NaCl to 230 ml of H2O? (A: 4.3 M NaCl) 7. What is the molarity of a KNO3 solution prepared by adding 151.5g of KNO3 to 300ml of H2O? (A: 5.00 M KNO3) 8. How many grams of NaOH are required to prepare 2.0 liters of 2.5 M NaOH solution in water? (A: 200g
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Water scarcity and global warming Global warming is expected to account for about 20 percent of the global increase in water scarcity this century. It is predicted that global warming will alter precipitation patterns around the world‚ melt mountain glaciers‚ and worsen the extremes of droughts and floods. Global water consumption increased sixfold in the last century - more than twice the rate of population growth - and will continue growing rapidly in coming decades. Yet readily available freshwater
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