.... of hydrogen and helium, and it has no apparent solid surface. The first two thirds of Neptune is composed of a mixture of molten rock, water, liquid ammonia and methane. The outer third is a mixture of heated gases comprised of hydrogen, helium, water and methane. The atmospheric composition is 85% Hydrogen, 13% Helium, and 2% methane. The planet's atmosphere, particularly the outer layers, contains substantial amounts of methane gas. Absorption of red light by the atmospheric methane is responsible for Neptune's deep blue color. Neptune is a dynamic planet with several large, dark spots reminiscent of Jupiter's hurricane-l .....

.... OF DISGUISE Things aren't always as they seem, and nowhere is this more true than in nature, where dozens of animals (and plants) spend their time masquerading as others. So clever are their disguises that you've probably never known you were being fooled by spiders impersonating ants, squirrels that look like shrews, worms copying sea anemones, and roaches imitating ladybugs. There are even animals that look like themselves, which can also be a form of impersonation. The phenomenon of mimicry, as it's called by biologists, was first noted in the mid-1800s by an English naturalist, Henry W. Bates. Watching butterflies in .....

.... Mg + 2HCl = MgCl2 + H2 In the reaction when the magnesium hits the acid when dropped in, it fisses and then disappears giving of hydrogen as it fisses and it leaves behind a solution of hydrogen chloride. The activation energy of a particle is increased with heat. The particles which have to have the activation energy are those particles which are moving, in the case of magnesium and hydrochloric acid, it is the hydrochloric acid particles which have to have the activation energy because they are the ones that are moving and bombarding the magnesium particles to produce magnesium chloride. The rate at which all .....

.... hardness scale and graphite is the softest. Diamond is very hard because of its dense packing and interlocking atomic arrangement. Graphite, on the other hand, although it is the same element, is more loosely packed and has a six-sided, layered configuration, which makes it soft (Pough, 1991). The differences between graphite and are accounted for by the conditions in which they are created. form over long periods of time, between 100 km and 200 km below the surface. At this great depth, carbon gets a chance to cool very gradually, forming diamond crystals. When volcanic eruptions occur, magma carries the up to the surface of the earth .....

.... of Ancient Greece. The Greeks were the first to seek a greater understanding of the world, to know "why" we are not just "what" we are. The Greeks invented science and explored it in its truest form, philosophy. Through the years we have developed tools that we hope can prove or disprove various hypothesizes, to further our understanding of any number of things. We divide science into categories and then sub-divide it even farther, until we can hide the connections and pretend that they really are separate. The difference between psychology and physics is not as extreme as one would believe if they were to read their definitions. Though t .....

.... to precipitation all the time. I was interested to see just how dangerous acid rain is. If it really is dangerous, I was also interested to see what thing's people can do to help stop its effects. If we cannot stop the effects, I would atleast like to know something’s I can do to lessen the effects on our environment. What is acid rain? Acid rain is the name commonly given to the deposition of a cocktail of acidifying compounds to soils, surface waters and buildings. These compounds arise mainly from the combustion of fossil fuels. In some parts of the United Kingdom, natural ecosystems have a significant acid-neutralizing capa .....

.... recent decades. One large area that has been studied extensively is northern Europe. In 1984, for example, environmental reports indicated that almost half the trees in Germany’s Black Forest had been damaged by acid rain. This form of pollution has also particularly affected the northeastern United States and eastern Canada. Industrial emissions have been blamed as the major cause of acid rain. Because the chemical reactions involved in the production of acid rain in the atmosphere are complex and as yet little understood, industries have tended to challenge such assessments and to stress the need for further studies; and because of the .....

.... during any period of time. The provides all the functions listed in the previous statements. Also, the provides an opportunity to define an organization and display it to everyone to see. Furthermore, is not a new product that has just been recently introduced in the market. However, it just has not been widely used until the past few years. People use everyday without knowing that they are using it. , therefore, is the client/server, PC, Unix, Apple and many other applications that one has been using on his/her work. Security on the Internet is just as hazardous as the . Any leakage of information through the transmission of data .....

.... Sometimes the symptoms of mood disorders take on different forms in children than in adults. Adolescence is a time of emotional turmoil, mood swings, gloomy thoughts, and heightened sensitivity. It is a time of rebellion and experimentation. Blackman (1996) observed that the "challenge is to identify depressive symptomatology which may be superimposed on the backdrop of a more transient, but expected, developmental storm." Therefore, diagnosis should not lay only in the physician's hands but be associated with parents, teachers and anyone who interacts with the patient on a daily basis. Unlike adult depression, symptoms of youth dep .....

.... in deserts. The greatest daily fluctuations occur in deserts near the equator. Temperatures above 100o F (38o C) occur regularly in summer. "Azizia, 25 miles (40 kilometers) southwest of Tripoli, in Libya, holds the record with 136.4o F (58o C), while Death Valley, Calif., comes close with 134o F (56.7o C). "(Genius book of world records 2000) Winters are cold in middle-latitude deserts, located far from the equator. "At Luktchin in central Asia the average temperature in July is 90o F (32o C), while the January average is 13o F (-10.6o C)--a range of 77 Fahrenheit degrees (42.6 Celsius degrees)"(Compton's Encyclopedia). The temperature .....