.... This produces tears that flow too fast to be drained away. The lashes catch many flying particles that otherwise would enter the . As further protection, the lids automatically close when an object suddenly moves close to the . The eye is made of 3 coats, or tunics. The outermost coat consists of the cornea and the sclera. The middle coat contains the main blood supply to the eye and consists of the choroid, the ciliary body, and the Iris. The innermost layer is the retina. The Sclera, or the white of the eye, is composed of tough fibrous tissue. On the exposed area of the eye the scleral surface is covered with a muco .....

.... theories about the aetiology of schizophrenia, but research has failed to pinpoint the origins. There is evidence that environmental pathogens (for example, viruses) are involved in the causation of schizophrenia. There is also evidence for a role of hereditary influences and obstetric complications on the incidence of schizophrenia. Furthermore, psychological influences have also been suggested as important in precipitating episodes of schizophrenia (for example, significant life events and interactions within the family). The symptoms and syndromes of schizophrenia are complex and very heterogeneous. Thus, the resulting theor .....

.... neutralize the alkalinity. 2) Acid rain will increase the acidicy of already acidic rocks and soil, such as granite, or the soil which results from corroded granite. Acidic chemicals, and alkaline chemicals react to each other by reducing the alkalinity or acidicy of each other. Which ever has the strongest pH level, usually will neutralize or reduce the pH of the other, but after the reaction is complete, both substances have undoubtably changed, their pH moved closer to neutral ( pH 7 ). This knowledge led to the use of Salting. Salting ( dropping salt, chalk, or limestone into lakes and streams ) is a done to reduce .....

.... since the downward force on the two columns of liquid is then equal. When the liquid levels are unequal, the pressures must differ. The difference in pressure can be measured in units of length of the vertical column of liquid. The mm Hg, or its modern version the torr, originated in this use of the manometer. Mercury is particularly convenient for use in manometers (and barometers) because at room temperature it has low vapor pressure, does not wet glass, and has a high density. Other liquids such as linseed oil or water have also been used in manometers. The barometer is a device for measuring the total pressure of .....

.... of man, that You visit him?" Creationism is the product of a literal interpretation of the Biblical story of Genesis. It holds that God created the world in a single act approximately 6,000 years ago--and that human beings, animals, and other forms of life exist today much as they did then. To many creationists, the theory of evolution is heresy. They argue that fossil records and other scientific evidence of evolution are either false or were themselves created by God. "In the beginning, God created the heaven and earth."And the earth was without form, and void; and darkness was upon the face of the deep. And the spirit of Go .....

.... limited ability to neutralize acidic compounds. This results in many lakes and streams being completely dead of fish and all other living things. Acid rain also greatly contributes to forest degradation, even more so to high-elevated trees, it also impairs the tree growth. Acid rain effects forest soil. As acid moves through soils, it strips away vital plant nutrients through chemical reaction, resulting in a threat to future forest productivity. Acid rain is also capable of eroding metals, including iron (the most important structural metal) stone and paint. Because of this acid rain accelerates the decay of building materials, .....

.... but in insulators and semiconductors there is an "energy gap", in which no electron orbits can exist, between the inner valence band and outer conduction band [Book 1]. Valence electrons help to bind together the atoms in a solid by orbiting 2 adjacent nucleii, while conduction electrons, being less closely bound to the nucleii, are free to move in response to an applied voltage or electric field. The fewer conduction electrons there are, the higher the electrical resistivity of the material. In semiconductors, the materials from which solar sells are made, the energy gap Eg is fairly small. Because of this, electrons .....

.... acid and nitric acid. Sunlight increases the rate of most of these reactions. Rainwater, snow, fog, and other forms of precipitation containing those mild solutions of sulfuric and nitric acids fall to the earth as . Water moves through every living plant and animal, streams, lakes, and oceans in the hydrologic cycle. In that cycle, water evaporates from the land and sea into the atmosphere. Water in the atmosphere then condenses to form clouds. Clouds release the water back to the earth as rain, snow, or fog. When water droplets fall to the earth they pick up particles and chemicals that float in the air. Even clean, unpo .....

.... 99 percent of all animal experiments are on rats and mice developed expressly for laboratory use. "Less than 1 percent of experiments involve cats, dogs, farm animals, nonhuman primates, frogs, fish, and birds." ( ¯Encyclopedia of Medicine, AMA®, "Animal Experimentation", Page 110.) Animal rights advocates try to sway public opinion by showing grotesque pictures of destroyed cats, dogs, farm animals, dolphins, and monkeys which account for less than 1 percent of the experiments, yet it seems 99 percent of their advertising and campaigning deal with this one percent. At least the American public realizes even those who portra .....

.... cleaning, gardening, and automotive products are also polluting our ocean. You wouldn't believe it but all of those products I just named regularly end up in water. About 65,000 chemicals are used commercially in the U.S. Today, with about 1,000 new ones added each year. Only about 300 have been extensively tested for toxicity. I think that since our oceans are doing so bad the U.S. should put a ban on new, and old, products that pollute the oceans. Metals and slowly degrading chemicals threaten inland and coastal waters. Toxic materials settle into sea floor where they accumulate as hazards to organisms that live in and .....