… underwater breathing apparatus. When using SCUBA equipment, a diver breathes from a tank that holds compressed air. S.C.U.B.A diving is different from holding your breath and diving. When we are living on dry land, the air around us has…

… (PCR) in 1983, and won the Nobel Prize in chemistry in 1993 for his work performed on PCR. Dr. Mullis considered PCR a concept rather than a technique, but the most important aspect to his concept is that PCR literally can pull out a small piece…

… Ernest Rutherford was one of the greatest physicists of all time. He was the primary founder of nuclear physics. His list of accomplishments and contributions to his field is nearly endless. His greatest contribution to science was with his nuclear…

… It's discovery dates back to prehistoric times in 9000BC. Signs of its uses were found in Iraq and North Africa. Copper has an atomic weight of 63.546 and its atomic number is 29. Its melting point is 1084.62 °C and 1984.32 °F while its boiling…

… oil supplies? Crude oil or "unprocessed oil" is a mixture of mostly hydrocarbons and a small percentage of sulphur compounds. It is a fossil fuel as it was initially formed around 300 million years ago, when tiny animals on the sea died and…

… today. This dilemma is harmful to every living creature on this planet. How can we limit the causes of air pollution? There are industrial as well as residential causes of air pollution. We need to limit the effects of air pollution. We all know…

… at which to reactants react and make a product. The two reactants in particular are marble (CaCO3) and hydrochloric acid (2HCl); the products that they produce are carbon dioxide (CO2), water (H20) and a calcium chloride (CaCl2). The product that…

… 'Global Warming' or 'The Greenhouse Effect'. The Greenhouse Effect is the process by which the Earth is made warm enough for all living things to survive. But because the Earth is becoming warmer than it used to be, we are heading towards possible danger…

… is anything that has mass and takes up space. Matter is made up of atoms and molecules. Gases are matter made of single atoms or molecules that are very far apart, moving rapidly. Liquids are made up of atoms or molecules that are closer together…

… the speed of reaction. There are many factors that could affect the rate of reaction. e.g. Concentration of the solution, temperature, surface area, catalyst, air pressure and stirring, etc. I decided to choose temperature as my changing variables to…