... collapse of a star, usually having a great, massive, core. A star is created when huge, gigantic, gas clouds bind together due to attractive forces and form a hot core, combined from all the energy of the two gas clouds. This energy produced is so great when it first collides, that a nuclear reaction occurs and the gases within the star start to burn continuously. The Hydrogen gas is usually the first type of gas consumed in a star and then other gas elements such as Carbon, Oxygen, and Helium are consumed. This chain reaction fuels the star for millions or billions of years depending upon the amount of gases there are. The star manages to avo ...
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... with their doctors and consider boiling their drinking water to kill any cryptosporidium.[2] This is just the tip of the iceberg. Some scientists believe that for every outbreak reported in the United States, another ten may be occurring.[3] One such study found that as many as one in three gastrointestinal illnesses — often chalked up to "stomach flu" — are caused by drinking water contaminated with microorganisms.[4] Such microbial-related outbreaks say nothing about the many other hazards borne by our nation's water supply. Researchers have shown that millions of Americans regularly drink tap water that is contaminated with toxic and cancer-causing chemical ...
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... and thus claimed that Dolly and her “mother” were genetically identical, which sparked a fury of outcry all around the world. The technique of transferring a nucleus from a somatic cell into an egg cell of which the nucleus had been removed, called nuclear transplantation, is an extension of research that had been ongoing for over 40 years. Up until now, scientists thought that adult cells could not be “reprogrammed” to behave like a fertilized egg and create an embryo, but the evidence obtained by Dolly’s success prove otherwise. The issues of cloning have been around for a long time, starting with the publication of Joshua Lederberg’s 1966 article on c ...
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... How far will we let biotechnological discovery take us? What will come of the world if designer babies become standard procedure? The earliest and maybe simplest use of genetic manipulation was in the selection of the sex of an unborn child. In Vitro Fertilization(IVF - A procedure in which a woman’s eggs are removed from her body, fertilized outside using sperm from her husband or another donor, and then transferred back to her body.) was originally limited to couples that were infertile. Even the use of IVF for the infertile was unheard of at one point. “But growing demand makes it socially acceptable, and now anybody who’ ...
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... plant species. The use of hydroponics in gardening as well as large scale crop growth can enable the grower to produce many types of plants out of their normal growing season. Another attraction and use for hydroponic growing methods is that a person can have a garden in small spaces such as an apartment. In addition a good source of natural sunlight is not required because the gardener will provide the plant's light requirements. This form of growing plants is not only an interesting topic of study, but also a viable method of producing many species of plants in either a small hobbyist garden or a large industrial crop producing system. Benefits of Hydroponics ...
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... that will react with the corroding substances more readily than the iron does which leads it to protect the iron from corroding. This method is also satisfactory but is also expensive. The most common example of this method is galvanizing, in which iron is covered with zinc. (3) Covering iron with an air proof and also a water proof substance. This method is the least expensive, therefore it is the most common. The forming of rust is known as a chemical reaction. A chemical reaction is defined as a process by which atoms are redistributed, resulting in a change in the molecular composition of the substances. Rust is also known as iron oxide. Rusting is a chem ...
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... PolarisC since both displays occur at the earth=s poles. WHAT CAUSES AN AURORA? For many years, the ideas about what causes an aurora were left to old legends and unsubstantiated theories. The inuit believed that the northern lights were the spirits of dead relatives, dancing around in the sky, while the Vikings believed that they were caused by a fire on the edge of the world. In the fourteenth century, Aristotle described the auroras as jumping goats caused by the earth=s vapours being set on fire by meteors. Later on, in 1707, a Norwegian physicist claimed that they were caused by steam and smoke that escaped from a heat source beneath Greenland. It was not ...
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... in many parts of the world. The abacus consists of beads strung on rows of wires suspended within a rectangular frame. A common form has a piece of wood dividing the beads, with five beads on one side, and two on the other side of the wood on each wire. Calculating Machines and their Inventors: Through the centuries, several mathematical geniuses invented machinesto aid them in their calculations. The machines were never widely used and generally had no direct path to the later development of electronic computers. Example: Pascal: Blaise Pascal (1623-1662) a French matematician, invented the first mechanical adding machine at age 19 in 1642. He becam ...
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... The second reason is that autotrophs are the lowest food on the food chart. Without them many heterotrops would die from starvation. 3. Why did you put your syringes containing leaf material in the dark prior to illumination? The reason this was done was to make sure as little oxygen as possible was contained in the leaf material. This coused the experimrnt to run properly. If the leaf material was not placed in the dark, the dark reaction would not have occured using up all the oxygen. If there was still oxygen in the leaf material, the data collected would have been off. The reason for this is that the leaves would have risen to the top of the liqiud quicker, ...
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... The United States did make an attempt after World War II at eliminating nuclear proliferation by proposing the Baruch Plan in the United Nations. This proposal stated that all nuclear technology and materials be placed under international ownership and that all nuclear weapons be destroyed. However, the Soviet Union feared that the United States would always have a military advantage if they gave up their plans for building a nuclear device and, therefore, rejected the proposal. I think that the refusal of the Soviet Union was a big mistake on their part. Not only did they put the safety of the U.S.S.R on the line, but of the whole world, as well. B ...
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