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Creation Of The Beach

... sediments are the source of 80 to 90 per cent of beach sand; some beaches are built to great widths by sediments washed to the sea by episodic floods, gradually eroding until the next major flood replenishes the sand. Beach formation begins as eroded continental material--sand, gravel, and cobble fragments--is washed to sea by streams and rivers. Two separate processes result in the deposit of this sand and sediment on the shore. Most sediment is suspended in sea water and transported along the coast by the longshore current, a stream of ...

Number of words: 1256 | Number of pages: 5

The Promise Of Genetic Engineering

... to control the gene will eventually lead to a promising future for the entire planet as a whole. Genetic engineering resulted not from the belief that nature should be manipulated and perfected by humanity. Rather, its principle aim is, as of any other technology, to improve the quality of life for the people of this planet. Therefore, it is necessary to weigh the benefits and consequences of this relatively recent breakthrough and determine in which ways it can be used to humanity's best advantage. This speech will investigate the wa ...

Number of words: 942 | Number of pages: 4

No Representation Of Allocentric Space Has Been Found In The

... on the organism's own perception of the surroundings) view of the environment. For the purpose of simplicity this essay will concern itself with only the brain of a rat. This essay will thus discuss the evolution of relevant behaviourist and neurophysiological theories, the most important being O'Keefe (1991); Muller, Kubie, Bostock, Taube and Quirk (1991); and Rolls (1991). The behaviourist theories proposed that a reward or aversive object/event will motivate a rat to move towards or away from the location along a reward gradient, and th ...

Number of words: 1785 | Number of pages: 7

Psychology - Classical Conditioning Vs. Operant Conditioning

... of a behavior is increased or decreased by the use of reinforcement or punishment. Operant conditioning deals with more cognitive thought process. These two forms of learning have similarities and differences. Their similarities are that they both produce basic phenomena. One such phenomenon is acquisition. Both types of conditioning result in the inheritance of a behavior. One of the most famous of experiments that illustrates classical conditioning is Pavlov's Dogs. In this experiment, Pavlov sat behind a one-way mirror and c ...

Number of words: 724 | Number of pages: 3

Alzheimer

... to the small town of Plum, the Grandfather was very confused. During the entire trip they had to keep reminding him where they were going, even though they just told him where they were going five minutes ago. This is a burden on the family because they have to keep repeating themselves. No one likes to repeat themselves over and over again. The first night that they were in their new home, the Grandfather was so disorientated. Even after he was put to bed, he would repeatedly downstairs and ask Hank and Catherine where he was. The se ...

Number of words: 968 | Number of pages: 4

Nuclear Weapons

... of nuclear weapons to protect people and the environment from nuclear radiation and to slow the development of nuclear weapons. In 1963, Great Britain, the Soviet Union, and the United States negotiated the first test limitation treaty, the Limited Test Ban Treaty. The TreatyÕs signers agreed not to test nuclear weapons in the atmosphere, in outer space, or underwater. The only testing that was allowed was underground testing. Attempts to control the number of nuclear weapons in the world began about 1970. The Strategic Arms Limitation ...

Number of words: 913 | Number of pages: 4

Fusion: Our Future's Energy?

... elements (elements with atomic numbers greater than Uranium that do not exist in nature). They discovered that the nucleus of Uranium-235 breaks apart into two smaller nuclei after absorbing a neutron. This happens because the extra neutron made it unstable. This produces more neutrons that bombard more Uranium nuclei, causing a chain reaction that produces an enormous amount of energy. The problem is the nuclear waste that is produces. It is very radioactive and will not become stable for a very long time. Such a harmful substance is a ...

Number of words: 967 | Number of pages: 4

Acid Rain 10

... air: In the air, the nitrogen ion becomes nitric or nitrous acid: NO2(g) + H2O(l) = HNO3(aq) + HNO2(aq) Sulfur dioxide is a colorless, prudent gas released as a by-product of combusted fossil fuels containing sulfur. What causes this is a variety of industrial processes, such as the production of iron and steel, utility factories, and crude oil processing. In iron and steel production, the smelting of metal sulfate ore produces pure metal. This causes the release of sulfur dioxide. Sulfur dioxide can also be emitted into the atmosphere ny ...

Number of words: 1747 | Number of pages: 7

Pollution Getting The Best Of

... polluting effect of cars is the heat it creates. This heat makes it unpleasant to be near the car while its running. And of course the most famous of the automobiles evils is the exhaust. The toxic fumes given off as a byproduct of the combustion engine are slowly deteriorating our lungs and our atmosphere. The exhaust is extremely toxic to human beings. But why do we do continue to drive these walking time bombs. Some people will say it is progress, but the majority drives it for the convenience. Why walk four miles in four hours when you ...

Number of words: 673 | Number of pages: 3

Ebola Virus

... " … Keep in mind the role that humans play in the spread of these infections. If we don't begin to deal with problems like overpopulation and poverty, we may end up looking back nostalgically on the late twentieth century as a time of health and tranquility. As we show you, in the world of viruses, we are the invaders (Baddorf, Ourworld.compuserve.com)." Between the years of 425BC-430BC Athens' population was dramatically reduced when about 300,00 of its inhabitants died from some sickness. Some people now believe that this grea ...

Number of words: 1098 | Number of pages: 4

Nigeria Rainforest

... of logging companies among a number of other things. Rainforests across the world are being destroyed everyday. These rainforests are being destroyed by human efforts which are centred around greed. Oil companines drilling for oil, logging companies, and fires are the leading causes in destroying the last Nigerian Rainforest. Rainforests cover only two percent of the entire earth’s surface.1 It is estimated that ninety-five percent of Nigeria’s rainforest has been destroyed. A Hong Kong company is logging out of Ni ...

Number of words: 240 | Number of pages: 1

The African Penguin

... guarded for about forty days and they go out on their own when they are about seventy to one hundred days old. The African Penguin (pheniscus Demersus) is also called the Black- footed Penguin or the Jackass Penguin. They are called this because of the loud braying noise, which the little penguins make. This species is the only species that breeds anywhere in Africa. It breeds on some twenty islands, from Hollams Bird Island off the coast of Namibia to Bird Island in Algoa Bay. At one time the population of the African Penguin was ...

Number of words: 982 | Number of pages: 4

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