.... National Park. In late Precambrian time this super continent began to rift apart under the tensional forces producing the Catoctin rift basalts that can be observed in the Shenandoah. As they rifted apart, they created a growing ocean called the proto-Atlantic or Iapetus after the father of Atlas, for whom the Atlantic Ocean is named. Towards the end of the Precambrian, the tensional forces changed to compression and subduction began. Volcanic islands grew as a result of andesitic volcanism associated with the subduction. With continued subduction and convergence, vo .....

.... harmful insects. Copper can also be used to help protect other materials against corrosion, and in small amounts is vital to all plant and animal life. The properties that make copper extremely useful include - Conductivity - Silver is the only better conductor, but is too expensive for common use. Copper also conducts both electricity and heat extremely well, which makes it extremely useful for cooking utensils, radiators, and refrigerators. Malleability - Copper is highly malleable. It does not crack when hammered, stamped, or forged, and can be worked when it is both hot .....

.... which leads to an ectopic pregnancy in pregnant women, is caused by . Ectopic pregnancy is the leading cause of death of pregnant teens in the inner city and poor neighborhoods. also causes conjunctitis. This is a swelling of the eyes which can lead to blindness. The bacteria also can lead to pneumonia. Although it is the most easily treated STI, most people in danger won’t get checked until complications show, and that is why the disease is spread so much. It takes about three weeks for most people to see symptoms. In that time, they have sexual contact with others a .....

.... race, color of eyes, hair and other physical characteristics, and are screened for conditions such as AIDS, gonorrhea and other STDS. Even though freezing sperm doesn't seem to affect a pregnancy, it reduces the sperm's movement and influences the success rate of . About 75 to 85 percent of women inseminated with fresh donor semen will get pregnant--especially if the procedure is repeated over several months. Unfortunately, freezing the sperm decreases the chances of success by 10 to 15 percent. Today's reproductive technology is not limited to helping create human families. .....

.... this period of time. The increased use of fossil fuels today also builds on this. There have been many attempts at stopping air pollution. The Clean Air Acts were effective for a little while. They made using some polluting substances illegal. This did not work because people simply did not listen. Solar Energy is another attempted solution. This type of energy is good because it is an alternative energy source to coal and other polluting fossil fuels. The problem with solar energy is that it is extremely expensive, but it has been used extensively throughout the wo .....

.... those below me from the sun's intense heat. I am fed and drunk by those who go through hunger. As acid contained in the human body, I digest food and clean out wastes. I am a desperate hope for a cure, yet poison, slowly spreading in the air and along the land. I am the colorful fireworks "sprocketed" across the dark sky when the touch of two soft lips are gently pressed together. I am the warm tears trickling slowly down a child's face when the thought of going to school all alone crosses his mind. I am te pure exhilaration every time two people fall in love. I am rubbed ro .....

.... at such sites as Oak Ridge, Tennessee, and Los Alamos, New Mexico (The World Book Encyclopedia 141). Here they designed to bombs that were later called “The Fat Man” and “The Little Boy”. There was later a movie named after the two bombs that showed how they were made and the experiences that came with making them. A worker was killed during the final stages of the Manhattan Project when a critical assembly of fissile material was accidentally brought together by hand. This incident, which was dramatized in “Fat Man and Little Boy”, pre-dated remote-control assembly .....

.... a method called carbon dating to determine the age of the fossils. Which can then be examined and placed along a timeline. The time periods show slight differences in bone structure showing what is hypothesized to be the human evolving. Evolving from what though? The theory of evolution states that creatures change overtime to suit their surroundings. This is called environmental adaptation. The more a creature can adapt to it's environment the greater chance it has of living and show an increase in population called survival of the fittest. A theory developed by a scientis .....