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Search results 51 - 60 of 1458 matching essays
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51: Problems Caused By Air Pollution
... life, which is incalculable (Edelson 35). Air pollution causes many health problems that lead to death. Also, air pollution causes a great deal of damage to the environment and property. Lot of air pollution creates acid rain, which deteriorates things. Acid rain began to emerge as a serious problem in the late 1960's, when a decline in fish population was noticed by scientists in Scandinavia (Edelson 37). In the 1970's, a number of ...
52: Air Pollution 2
... dangerous in its direct outcome as nuclear or water pollution can be, but in the long term it will have an tremendous effect on the environment and health of its organisms living in. Asthma, cancer, acid rain, and the disability to photosynthesize are only a few causes of air pollution.The atmospheric pollutants with the greatest effect onto the environment are the carbon monoxide, carbon dioxide, hydrocarbons, sulfur dioxide, nitrogen oxides, dust ... and it effects the environment with carcinogen. Carcinogen is a chemical agent that causes cancer. Sulphur dioxide is certainly one of the major atmospheric pollutants considered that it causes stinging eyes, lung damage, asthma, and acid rain. It is the result of coal-fired power stations. Nitrogen oxides that is produced by the exhaust of cars, causes pneumonia and asphyxia. The outcome of the well known dust particles is often ...
53: Determination of An Unknown Amino Acid From Titration
Determination of An Unknown Amino Acid From Titration Abstract Experiment 11 used a titration curve to determine the identity of an unknown amino acid. The initial pH of the solution was 1.96, and the pKa’s found experimentally were 2.0, 4.0, and 9.85. The accepted pKa values were found to be 2.10, 4.07, and 9.47. The molecular weight was calculated to be 176.3 while the accepted value was found to be 183.5. The identity of the unknown amino acid was established to be glutamic acid, hydrochloride. Introduction Amino acids are simple monomers which are strung together to form polymers (also called proteins). These monomers are characterized by the general structure shown in figure ...
54: Types of Land Features
... There is no wet or dry season, but there are four seasons: spring, fall, summer, and winter. The winter is usually cold and snowy. The spring is a warmer temperature, there is a lot of rain and the plants begin to grow back their leaves from the fall. In the summer, the temperatures reach their highest. In the fall, trees shed their leaves and the temperature begins to cool. The deciduous ... Animals such as raccoons, skunks, foxes, voles, and mice are very common in the deciduous forests. Amphibians are just as common such as frogs, toads, and salamanders. Threats to this biome are happening more frequently. Acid rain and air pollution is threatening plants and animals. Deer population has become a bigger threat over the last decade. Because the deer have not enough predators to the area, their size is over growing. ...
55: Rates of Reaction
Rates of Reaction BACKGROUND INFORMATION What affects the rate of reaction? 1) The surface area of the magnesium. 2) The temperature of the reaction. 3) Concentration of the hydrochloric acid. 4) Presence of a catalyst. In the experiment we use hydrochloric acid which reacts with the magnesium to form magnesium chloride. The hydrogen ions give hydrochloric acid its acidic properties, so that all solutions of hydrogen chloride and water have a sour taste; corrode active metals, forming metal chlorides and hydrogen; turn litmus red; neutralise alkalis; and react with salts of ...
56: Mans Effect On The Environment
... well. 2) FIVE MAJOR POLLUTANTS: SULPHUR DIOXIDE Sulphur Dioxide comes from both car and factory emissions. Sulphur Dioxide is a poisonous gas which can kill plants and is the main gas that is involved in Acid Rain. Oil Oil can be spilt into our oceans by tankers and from Oilrigs themselves. It is denser than water and therefore floats on it and is taken to shore by the sea. At this point ... fossil fuels and from car emissions as well. When reacted with sunlight, mosture and oxidants it produces sulphuric and nitric acids. These then get mixed up with the water cycle and fall to earth as Acid Rain. Catalytic Converters are used in cars now to reduce the amount of harmful emissions given off. You can also use cleaner power such as Hydro and Nuclear which would also reduce the amount ...
57: Water Pollution
... treatment facilities are intended to treat waste water so that when it is returned to the surface water, it does not carry with it disease-causing organisms. Sometimes however, the facilities malfunction due to heavy rain storms or overloading and raw, untreated sewage is released into the surface water. It carries with it organisms that can cause diseases such as hepatitis A. Untreated human wastes deplete the water of oxygen. This ... POLLUTION Nonpoint source contaminants cannot be traced to any on source, making it much more difficult to control. Airborne toxins account for one third of the pollutants that enter waterways and oceans each year.4 Acid rain is one such toxin. If a large amount of acid rain falls in a particular area, it can cause the pH of the surface water to become more acidic. The emission of sulfur dioxide ...
58: Science Experiment On Odor Changes of Various Chemicals
... I put 4 ml of vinegar in a test tube and noted the odor, I then added 1 ml of ethyl alcohol and noted the odor. Lastly, I was to add seven drops of sulfuric acid while stirring over a Bunsen burner. I then repeated this process with salicylic acid and methyl alcohol. In this project, my main objective was to accomplish why the odor changed after my mixtures were warmed. My hypothesis for this experiment was that the different smelling chemicals, after being mixed ... with the correct answer and see if my hypothesis was correct. I first had to research all of my chemicals and note their specific contributions to the experiment. The chemicals included vinegar, ethyl alcohol, sulfuric acid, salicylic acid, and methyl alcohol. RESEARCH OF THE PROBLEM To start my project, I researched vinegar. Vinegar is a sour liquid with a pungent odor, containing acetic acid, and is made by fermenting dilute ...
59: Enviromental Science Profit Or
... in order to save it. Unfortunately, the media with its powerful arms of influence, has nor done nearly enough informing the public. There are many serious issues concerning the environment . Some of these issues are Acid Rain, Air pollution, and Oil industries. Acid Rain Acid rain is a serious problem with disastrous effects. Each day this serious problem increases. Many people believe that this issue is too small to deal with right now, and others believe it ...
60: Jungle and The Rain Forest
Jungle and The Rain Forest Jungle and rain forest are terms that are often used synonymously but with little precision. The more meaningful and restrictive of these terms is rain forest, which refers to the climax or primary forest in regions with high rainfall (greater than 1.8 m/70 in per year), chiefly but not exclusively found in the tropics. Rain forests are ...


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