.... amazed by dramatic river bends as freshwater finds its way back to the sea. The vast expanse of marsh grasses or mudflats extend into calm waters that then follow the curve of an expansive barrier beach. Wherever there are estuaries, there is a unique beauty. As rivers meet the sea, both ocean and land contribute to an ecosystem of specialized plants and animals. At high tide, seawater changes estuaries, submerging the plants and flooding creeks, marshes, panes, mudflats or mangroves, until what once was land is now water. Throughout the tides, the days and the years, an estuary is cradled between outreaching headlands and is buttressed on its vulne .....

.... state from which the universe rapidly expanded.1 The Big Bang was the start of time and space. The matter and radiation of that early stage rapidly expanded and cooled. Several million years later, it condensed into galaxies. The universe has continued to expand, and the galaxies have continued moving away from each other ever since. Today the universe is still expanding, as astronomers have observed. The Steady State model says that the universe does not evolve or change in time. There was no beginning in the past, nor will there be change in the future. This model assumes the perfect cosmological principle. This principle says that the universe i .....

.... tuning and redesign using star schemas or snowflake data structures. However, all have limitations - either in functionality or in terms of cost - and their strengths are almost inevitably outstripped by users' demands. During the past three years, data warehousing has emerged as one of the hottest trends in information technology for corporations seeking to utilise the massive amounts of data they are accumulating. Managers from all business disciplines want enterprise wide information access, as well as the ability to manipulate and analyse information that the company has gathered for a single purpose, to make more intelligent business decisions. .....

.... which on the average contain from 40% to 50% alcohol. Drinkers may become addicted to any of these beverages. Physical Effects of Alcohol The effects of alcohol on the human body depend on the amount of alcohol in the blood (blood-alcohol concentration). This varies with the rate of consumption and with the rate at which the drinker's physical system absorbs and metabolizes alcohol. The higher the alcohol content of the beverage consumed, the more alcohol will enter the bloodstream. The amount and type of food in the stomach also affect the absorption rate. Drinking when the stomach is filled is less intoxicating than when it is empty; the foods in the stomach, .....

.... of electrons from one atom to another. In this process of electron transfer, each atom becomes a ion that is isoelectronic with the nearest noble gas., the substance is held together by electrostatic forces between the ions. The tendency for these ions to be formed by elements is corespondent to the octet rule, when atoms react,, they tend to do so in such a way that they attain an outer shell containing eight electrons. The factors that effect the formation of ions are ionization energy, electron affinity, lattice energy. Figure 1 The transfer of electrons involved in the formation of (a) sodium chloride and (b) calcium fluoride. Each atom forms an ion w .....

.... by hydrogen bonding between pairs of bases such that guanine always pairs with cytosine and adenine always pairs with thymine; this is called complementary base pairing 3. The diameter of the helix is 2.0 nm and adjacent bases are separated by 0.34 nm and inclined at 360 relative to each other. This means that each complete turn of the double helix contains about 10 base pairs. 4. The amount of guanine is usually equal to that of cytosine. The monomers of RNA and DNA are called nucleotides. Each nucleotide has three parts: A Five Carbon or Pentose Sugar The sugar will be one of two very similar pentose rings. Ribo contain the sugar ribose. Deoxyribo contain .....

.... It means "luckiest of the lucky" in Arabic. It is the brightest star in the constellation Sadachbia: Arabic for "lucky star of hidden things" or " lucky star of the tents." This makes up part of the asterism sometimes called the tent, but is usually called the urn referring to Aquarius. Skat or Scheat: It comes from the Arabic word for shin and it dates back to the translation of Ptolemy's Almagest. Albali: The name comes from the Arabic, which means "swallower"; no one really knows why the star got this name Situla: This name comes from Latin and means "well bucket". Situla was the original Arabic name for the entire constellation Aquarius. Th .....

.... When discussing with the ozone layer, one should know the four major atmosphere levels on earth. The troposphere which is between zero and fifteen kilometers in altitude and has tempera- ture ranges from two hundred to two hundred ninety kelvins. The second is the stratosphere which ranges from fifteen to approxi- mately fifty kilometers in altitude and has temperature ranges from two hundred to two hundred fifty kelvins. The third level in the atmosphere is mesosphere. This level ranges from fifty to eighty-five kilometers in altitude and has temperature ranges between one hundred eighty and two hundred fifty kelvins. Finally, the thermosphere is the final .....