.... damage to the laboraty. The third rule is that you should only interact with your partner and the teacher. This will prevent distraction from your set experiment. The fourth rule is that you should not leave your experiment unattended whether you think it is dangerous or not. This rule is completely self explanatory for safety purposes. The fifth rule is to be extremely careful with equipment. Not only for money purposes but also for your own personal safety. The sixth rule is to not touch anything that the teacher or the lab specifically instructs you to. Because you don't need to. The seventh rule states that activities should only be done if they are speci ....

.... was believed to be, simple atmosphere and hydrosphere on our primitive Earth in a sealed glass ecosystem. This ecosystem had a bulb, which contained an amount of water with hydrogen, nitrogen, and simple carbon compounds dissolved in them. These various elements were believed to either formed with the Earth or were picked up by the many meteoric collisions that immediately following the formation of our planet. The bulb had a heating unit under it to stimulate evaporation, then there was a smaller bulb that contained electrodes, simulating lightning and other static discharges, the evaporated water and gasses rose into this electrified bulb and were occasionally energize ....

.... the organelle. It is highly permeable to small solutes such as molecules and ions, but it blocks off passages of proteins and other macromolecules. The inner membrane of the mitochondria is folded into shelf like structures called cristae. The cristae does not even allow the passage of small ions and so it maintains a closed space within the cell. The many infoldings of the cristae are responsible for providing the mitochondrion with a large surface area which enhances the productivity of respiration. The inner membrane and outer membrane effectively divide the mitochondria into two internal compartments. The space located between the outer and inner mitochondrial memb ....

.... molecule, one atom of oxygen and two molecules of hydrogen are needed). He also discovered the noble, or inert gases, and their failure to react with other substances. In 1869 a Russian chemist, best known for his development of the periodic law of the properties of the chemical elements (which states that elements show a regular pattern ("periodicity") when they are arranged according to their atomic masses), published his first attempt to classify the known elements. His name was Mendeleyev, and he was a renowned teacher. Because no good textbook in chemistry was available at the time, he wrote the two-volume Principles of Chemistry (1868-1870), which later became a classi ....

.... garbage in open dumps causes air pollution, and also it smells pretty bad. Air pollution comes from many different sources. One of the major sources is carbon monoxide which manly comes from automobiles, but also burning of fossil fuels, CFCs etc. Air pollution does not leave the Earth it all gets trapped up in the atmosphere. This doesn't bother most people, and they think that it will not harm them. People burn down forests and people burn fossil fuels, and CFCs from aerosols. Every bit of this harms our atmosphere. Factories and transportation depend on huge amounts of fuel billions of tons of coal and oil are consumed around the world every year. When these fuels b ....

.... for these feelings. In some cases thoughts of death and suicide may come into play, depending on the seriousness of the depression. People who are depressed may find it difficult and become overwhelmed by simple daily tasks, which is why sometimes they withdraw from daily activities altogether. They may even withdraw from families and friends. Rod Steiger an Academy Award-winning actor who had starring roles in over 72 films is clinically depressed. During a time when Rod was down he wrote a letter to his wife and son: I want to die; I don’t want to move. I have no feeling for movement. To be left alone, to disappear. Not to be bothered with washing, shaving, talking ....

.... is really frozen raindrops. Unlike hail, sleet forms near the ground in cold weather. The biggest hailstone ever found was discovered in Coffeyville, a small town in southeast Kansas. This hailstone weighed 1.671 pounds and was 17.5 inches in circumference. The largest stone previously on record was almost the same size. It was found in Potter, Nebraska on July 6, 1928. The hailstone had a circumference of 17 inches and weighed 1.51 pounds (Dennis 54). Hail can be extremely dangerous. It can break windows, damage roofs, dent cars, injure and even kill people! Crops are greatly affected. Hail causes around two hundred million dollars in damage a yea ....

.... how humans came to be what they are today. Through much scientific evidence and studies, there is now physical proof that human beings may have evolved from ape-like creatures. Even with this, there are still disputes in the paleoanthropological field of whether or not this is true. Still, many choose to believe their religious creation stories where a God created humans. Whether it is Johanson's idea on human evolution or Leakey's or even the Roman Catholic's creation story, all are an individual own interpretation and neither wrong nor right. A paleanthropologist by the name of Donald Johanson is one of the many who have a very different view on the origin of humans. In 19 ....