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Search results 6451 - 6460 of 14167 matching essays
- 6451: ACID RAIN
- ... the northeastern United States. Nor are the destructive effects of acid rain limited to the natural environment. Structures made of stone, metal, and cement have also been damaged or destroyed. Some of the world's great monuments, including the cathedrals of Europe and the Colosseum in Rome, have shown signs of deterioration caused by acid rain. Scientists use what is called the pH factor to measure the acidity or alkalinity of ... acidic. Rainfalls in the eastern United States and in Western Europe often range from 4.5 to 4.0. Although the cost of such antipollution equipment as burners, filters, and chemical and washing devices is great, the cost in damage to the environment and human life is estimated to be much greater because the damage may be irreversible. Although preventative measures are being taken, up to 500,000 lakes in North ...
- 6452: A Discussion On Earthquakes
- ... does, that move in a circular motion beneath the plates. When two plates are pushing against each other, they are constantly building up tension on the fault. When two plates finally slip, they release a great amount of energy in the form of shock waves. These shock waves cause vibrations, which in turn cause the ground around the fault line to move and shake. This phenomenon is know as an earthquake ... threat is significant, a warning is issued. This warning process was put into action in June, 1988 when a magnitude 5.1 shock--one of the largest in the San Francisco Bay region since the great 1906 earthquake--struck 60 miles south of San Francisco. Alerted by the USGS that there was a 1 in 20 chance of a larger earthquake in the next five days, the California OES issued an ...
- 6453: Mellville and Darwin's Writings on the Galapagos Islands
- ... of an image in the minds of the common reader. Darwin writes of a specific island, Chatham Island, and replaces Mellville's heaps of cinders with "A broken field of black basaltic lava,...crossed by great fissures." Using specifics, Darwin notes on the abundance of "Euphorbiaceae"; not only unheard of by the common reader, but unpronounceable as well. This illustrates that the intended readers of Darwin's passage are perhaps botanists ... Primarily, Darwin uses mild variations on the simple sentence structure; Mellville, varied structures. The third paragraph of Mellville's passage consists solely of one long sentence, formed by piling images: And as for solitariness; the great forests of the north, the expanses of unnavigated waters, the Greenland icefields, are the profoundest of solitudes to a human observer; still the magic of their changeable tides and seasons mitigates their terror; because, though ...
- 6454: The Dung Beetle, What a Marvelous Creature.
- ... to my past to figure out who or what I was going to make a tribute speech over. Then I thought back to my childhood to what I enjoyed doing the most. I remember the great times I had with my mother, and how she would always get me the package of candy I would ask for when we went shopping. My mother would make a good tribute speech I thought ... the dung beetle should be respected, and given tribute more often. Not only do dung beetles play a vital role in breaking down dung and incorporating it into the soil, but they also provide a great form of childhood entertainment. (To add to the effect, pass out some Butterfinger BB's or some malt balls before you gie the speech.)
- 6455: Acid Rain
- Acid Rain Acid rain is a great problem in our world. It not only causes fish and plants to die in the waters it contaminates, but adversely affects the entire food chain. Acid rain is all the rain and snow that contains ... problem that must be dealt with on a Global level. The problem was first brought to light about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not ...
- 6456: Organic Compounds
- ... been used for thousands of years as an intoxicating ingredient in alcoholic beverages such as wine, mead, ale. All simple alcohols are liquids. Besides their physical uses as solvents and reaction media, alcohols are of great value to the chemist because they are versatile in chemical reactions. They can be converted into almost every other kind of aliphatic compound. They form a whole host of important chemical intermediates and can be ... Both aldehydes and ketones are characterized by the carbonyl group, C O. Methanal, better known as formaldehyde, is manufactured from methanol and is used to make plastics and adhesives. There are no other aldehydes of great industrial significance. The most important ketone is propanone, or acetone. Acetone is made from 2-propanol and used in plastics, solvents, and making other chemicals. (pg.596, Smoot, Merill Chemistry) Acids and Esters Carboxylic acids ...
- 6457: Tin
- ... discovered by the ancients. Tin was an accidental discovery. Tin has been around for many years. Proof is in the fact that tin is mentioned in the old testament of the bible. Tin had a great effect on the world because of its low price, high electric conductivity, and because tin protects against rust and weak acids in food if the can is made out of tin instead of aluminum. Some ... protective coating. This protective coating can be as small as 15/1,000,000 of an inch. This protective coating protects against rust on steel and other metals. A coating of tin also gives a great look to plain old steel. Tin cans for food prevents weak acids from damaging the inside of the can. Not many cans are made of tin since aluminum started to be used for cans tins ...
- 6458: Oxygen
- ... in pressurized cylinders or, as is often the case when large amounts are involved, through pipelines to nearby industrial plants. RELATIONSHIP TO LIFE SCIENCES Most organisms depend on oxygen to sustain their biological processes. The great majority of living organisms fall into two categories. In the first category are the higher plants and the photosynthetic bacteria. These organisms utilize light energy through PHOTOSYNTHESIS to combine carbon dioxide and water (or, infrequently ... more than one crystal structure (polymorphism). The most oxidized compound, titanium, is widely used in the RUTILE form as a white pigment in paints. Ternary oxides, consisting of two metallic elements plus oxygen, are of great interest to solid-state scientists. For example, compounds such as the SPINELS and the PEROVSKITES are studied extensively because of their interesting magnetic and electrical properties. Examples of important ternary oxides are the magnetic FERRITES ...
- 6459: Oxygen
- ... a mixture of carbon monoxide and hydrogen called synthesis gas, used for the synthesis of methanol and ammonia. High-purity oxygen is used also in the metal- fabrication industries; in liquid form it is of great importance as a propellant for guided missiles and rockets2. I have chosen the element "Oxygen" because without Oxygen, human beings would not be able to live. Oxygen is probably the single most important element in ... is called oxidation. The rate of the reaction varies with different elements. Ordinary combustion, or burning, is a very rapid form of oxidation. In spontaneous combustion, the heat evolved by the oxidation reaction is sufficiently great to raise the temperature of the substance to the point that flames result. For example, phosphorus combines so vigorously with oxygen that the heat liberated in the reaction causes the phosphorus to melt and burn ...
- 6460: Nuclear Legacy
- ... the waste into outer space but it too will cost a fortune. They tried to dump barrels filled with nuclear waste into the ocean but they started leaking. As you can see, there is a great need for a nuclear waste disposal site. These sites may sound frightening, but it may be the only way for us to dispose the devastation we had longed to create. In 1986, the decision for ... the video, I saw how dangerous nuclear waste can be to the environment, and how it affects our entire planet, not simply as individuals. The debris left from the bombing of Hiroshima, Japan had a great impact on me. I was heartbroken by the sight of the many people who were killed and those who were left to die. It is thoroughly frustrating to see how one discovery, the discovery of ...
Search results 6451 - 6460 of 14167 matching essays
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