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Science Online Essays


Formation Of Protocells
Number of words: 797 | Number of pages: 3

... caused chemical reactions to occur very often and there was also another source of heat from the young earth crust which was volcanically active. For most chemical reactions to take place, a spark of electricity is needed, and this was provided by the lightning in the atmosphere. Amino acids basically consist of hydrogen, nitrogen, oxygen and carbon. Due to all of the lightning chemical reactions took place between molecules of N2 and H2, thus these molecules formed Amino acids. A famous American scientist Dr Fox, was able to show how amino acids, the building blocks of proteins found in all living things, could spontaneously organize themselves into "microspheres." These cell-like st ...

The Prairie Dog: Friend Or Foe?
Number of words: 1768 | Number of pages: 7

... of available potential habitat. Prairie dogs are essential to our prairie ecosystem. Many species dependent on prairie dogs for prey and habitat are diminishing in direct relation to the decreasing number of prairie dogs. Unlike other species, which have declined because of habitat loss due to human activities, the loss of prairie dog populations is a direct result of governmental and private landowner efforts to eradicate them. Prairie dogs and their environment must be protected by law to preserve our native prairie ecosystem. Tim Clark, a Yale University biologist and a veteran of years of observing prairie dogs and black-footed ferrets in the field, is quoted in National Geograp ...

Are UFOs Real?
Number of words: 3163 | Number of pages: 12

... in interstellar travel. Another hypothesis on the nature of UFOs is the demonic force hypothesis. It states that the UFOs represent demons coming to earth for the final battle between good and evil (Randle 112). The not so widely accepted theory is that of hallucination/dream. Its major debunker is that mass hallucinations would have to be fairly common. The final hypothesis on UFO sightings is the null hypothesis, which states that they simply do not exist (Randle 114). There are three different specific types of sightings. First comes the Close Encounter of the First Kind. In this setting, a UFO is seen at close range, but does not interact with its environment, this type is the most co ...

Attention Deficit Disorder ( Add)
Number of words: 1447 | Number of pages: 6

... in social relationships. „h Difficulty in waiting turns, interrupting or intruding on conversations/games. Examples of hyperactivity will be seen through the child often fidgeting or squirming in their seats. The will be described as being "on the go" or acting as if "driven by a motor". Many other symptoms like quick shifts of moods temper outbursts, and problems with getting along with others also occur often. Unfortunately, most of the disorders features are negative. Children with ADD can often concentrate and behave more appropriately in small groups with few distractions in the situation. Their intelligence is normal but find it a challenge to sustain mental effort. Throughout the ...

Nuclear Energy
Number of words: 1496 | Number of pages: 6

... power plants and at other facilities all the time. An accident at a nuclear power plant has the potential to be much more harmful than an accident at a coal or gas plant because of the radiation that could be released. An example of this is Three Mile Island in Pennsylvania where there was a partial core meltdown in march of 1979 caused large amounts of radiation to be released into the atmosphere. Accidents involving US nuclear power plants are very rare. This does not mean that they do not occur. In the early 1980's there was a fire at Yankee Atomic, a nuclear power plant in Massachusetts, destroying over 3 million dollars worth of electrical wiring in the reactor. It was caused ...

Livestock And Wastes
Number of words: 1434 | Number of pages: 6

... the lagoon and is broken down by anaerobic bacteria over several months. The liquid rises to the top and is collected and sprayed over nearby fields. Many problems come with the lagoons. North Carolina is one of the top hog producing states in the country. On June 21, 1995, North Carolina suffered the largest agricultural waste spill in its history: a 7.5-acre, 12-foot-deep lagoon leaked 25 million gallons of hog waste into the headwaters of the New River near Richlands. The waste from the 10,000-head operation, owned by Oceanview Farms, contaminated the water for several miles downstream, increasing the levels of nitrogen, phosphorus, and other nutrients. When nutrient levels increa ...

Alternative Fuel Source
Number of words: 349 | Number of pages: 2

... capable of making America energy independent. There is only one catch: the federal government prohibited the growth of hemp in 1938. There were also theories that the major energy industries of the late 30s collaborated to ensure a petroleum-based energy market. Regardless of laws, let us consider hypotheticals. Farmers would be practically guaranteed profit if they could grow hemp for biomass. It also would not take long for a measly 6% of the American landmass to start cultivating hemp – enough to replace our economy’s dependence on fossil fuels. As this energy crop grew, it would take CO2 from the air – stabilizing the CO2 content in the atmosphere. The threat of global warmi ...

Silicon
Number of words: 1438 | Number of pages: 6

... transfer devices, radiation detectors and a variety of other devices. Silicon belongs to the group IV in the periodic table. It is a grey brittle material with a diamond cubic structure. Silicon is conventionally doped with Phosphorus, Arsenic and Antimony and Boron, Aluminum, and Gallium acceptors. The energy gap of silicon is 1.1 eV. This value permits the operation of silicon semiconductors devices at higher temperatures than germanium. Now I will give you some brief history of the evolution of electronics which will help you understand more about semiconductors and the silicon chip. In the early 1900's before integrated circuits and silicon chips were invented, computers and rad ...

A Study Of B.F. Skinner And Behaviorism
Number of words: 2037 | Number of pages: 8

... the works and studies of John B. Watson and Ivan P. Pavlov, he studied with animal learning and functions of the nervous system. He received his Ph.D. in behavioral psychology at Harvard in 1931. In 1936, he then worked as part of the faculty at the University of Minnesota. A few years later in 1939 to 1945, during World War II, he designed the "baby box" or better known to psychologist as the "Skinner box". It was a controlled environmental chamber for infants and he was even disturbed enough to allow his daughter Deborah to spend the first couple of years of her life in it. He has studied in the realm of psychology involving "programmed instruction", which involves the "principles of le ...

Microbiology
Number of words: 2025 | Number of pages: 8

... bacteria. The Beginning of Microbiology Zacharias Jansen created the microscope. Although Robert Hooke is the one who made it widely known. In 1665 Hooke published a book called Micrographie. It contained his thoughts on chemistry as well as a description and list of uses for a microscope. With this he opened the door to microbiology. For the first time the world was able to see very small creatures and objects. From the use of a microscope he was able to make drawings of the structure of a feather, the eye of a fly, the stinger of a bee, and the plant-like form of mold. And from his observations of a slice of cork, he discovered that everything is made up of cells. With ...

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