.... drift, they may change again. They may react with other chemicals in the air. When sulfur dioxide combines with water, the result is sulfuric acid. When nitrogen oxide gas combines with water, the result is also another acid. When the clouds releases rain or other precipitation, the acid goes with it. This is called acid rain. The level of acid is measured in pH levels. The pH scale begins at 0 and ends with 14. A reading lower than 7 is called acidic, and a reading higher than 7 is called basic. Seven is neutral. Normal rain is slightly acidic with a pH level of about 6. .....

.... The experiment the scientists performed is the equivalent of a mother producing twins. The process has been practiced and almost perfected in livestock for the past ten years, and some scientists believe that it seems only logical that it would be the next step in in-vitro fertilization. The procedure was remarkably simple. Hall and Stillman "selected embryos that were abnormal because they came from eggs that had been fertilized by more than one sperm" (Elmer-Dewitt 38), because the embryos were defective, it would have been impossible for the scientist to actually clone another .....

.... the major concerns being addressed by researchers in this region. climate modellers have predicted a large increase in temperature for this region, which could lead to even drier conditions and enormous stresses on vegetation in the western Canadian boreal forest. This type of impact was observed following the 1988 drought it experiences, when there was a die-back of aspen over extensive areas of the aspen parkland in Western Canada. Associated with this drought was a drying up of large lakes in the region. Another potential impact for the region is a major increase in forest fires. This is .....

.... of Georgian Bay in Ontario, and to the interpretation of hummocky terrain in southern Alberta, and other areas, by various workers. Shaw suggested as many as 10 meltwater discharges, similar to those which caused the Livingstone Lake drumlins, would be needed to account for drumlin fields in other areas [Shoemaker, 1995, p. 3]. The subglacial meltwater hypothesis of Shaw et al has several parallels to an interpretation of drumlins as streamlined landforms caused by the currents of flood waters generated by uplift, presented in the 1979 article Drumlins and Diluvial Currents by Cox. Although .....

.... is benefited by fire, aquatic ecosystems are negatively impacted by large fires through the increase in sediment flow. Fire is essential in maintaining biological diversity in the Northern Rocky Mountain forests. NEGATIVE EFFECTS - AQUATIC ECOSYSTEMS Contrary to the beneficial impacts of fire on terrestrial wildlife, aquatic ecosystems are negatively affected, such as the decrease in fish populations by fire. In the North Fork Shoshone River adjacent to Yellowstone National Park, fish died from increased sediment flow during a heavy rainstorm two years after the canyon had burned ( .....

.... 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 became tired of adding long columns of figures while helping his father, who had .....

.... Jupiter is the fifth planet from the sun and is also the largest planet in the Earth’s solar system. It is 318 times more massive than Earth and is two thirds of the planetary mass in the solar system. Jupiter’s surface, unlike earth, is gaseous and not a solid. It is about 90% hydrogen and 10% helium with traces of methane, ammonia, water and rock. Jupiter’s interior is very similar to the Sun’s interior but with a far lower temperature. However, it is still unknown but Jupiter is believed to have a core of liquid metallic hydrogen. This exotic element can only be achieved at pressu .....

.... – From the Latin word aurum (gold) ? Uses – electronics, jewelry, coins ? Obtained From – crust of the earth, copper ores Atomic and Chemical Properties: In it’s usual state – atomic mass number 197 – gold is stable. However, there are radioactive (unstable) isotopes of mass number 186 to 196 and 198 to 203. Gold normally exhibits a chemical valence of one or three. Gold is the “noblest” of the noble metals (gold, platinum, palladium, and rhodium), so termed because of their inertness, or reluctance to enter into chemical reactions. .....

.... was made of two parts. The crew stayed in the Command Module, which had some couches and was pressurized with oxygen. Behind the CM was the SM or Service Module which had the main engine, which had 21,500lb. of thrust. The reaction control system , oxygen, fuel cells, hydrogen tanks, and envirnmental control systems. The main engine was only used for changes in course and changes in orbit and escape from the lunor orbit. When the crew came back for reentry the CSM would split. The Command Module had heat sheilding so it would not burn-up. When the CM first came into reentry it was stabi .....

.... the prostate gland. Later on in the course of the illness, the prostate gland cells can spread around the body, particulary to the bones where they can paues pain and disability. Estimates show that the cancer may have been growing in some men for up to 10 yearsbefore it causes symptoms and is diagnosed. Some men develop symptoms whereas others do not. In those who that do, the following symptoms are commonly found: BATHROOM TROUBLES: -Need to urinate frequently, especially at night -Sudden, incontrolable urges to urinate -Weak or interrupted urine flow -A burnin .....