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= The Density and Buoyancy of Water =

Water, one of the original and first elements that was found since the first by the earliest philosophers and scribes of the earliest times. Water is very essential to the life and survival of humans. The earliest civilizations usually would be found near water sources such as the Mesopotamian and the Tigris and Euphrates rivers. Another example of other civilizations depending on water is the Egyptians. The Egyptians lived and settled by the Nile River and is their main source of water for the whole civilization. They know how important the water is so they have gods they worship to thank them for the water they were given to survive. The important thing is that water is important to all life no matter what. It is so important that two thirds of the earth’s surface is covered by water and the human body is made up of 75% of water. Water circulates through the lands as it also does in the human body. It transports, dissolves, replenishes nutrients and organic matter, and carries away waste materials.

The Rules of water include buoyancy, a important part of the style of water and how it acts. Buoyancy is defined as the tendency or capacity to remain afloat in a liquid or rise in the air or gas. Buoyancy can be experienced whenever you go to any body of water. If you go to a pool, you would usually float because buoyancy. Another more common example of buoyancy has to do with lunch. When you drink a bottle of water, you would see the bubbles come to the top of the surface of the water and the air bubbles would pop. This is because of buoyancy because of the air molecules being lighter than the water molecules, making it rise and eventually reaching to the top. The formula for density has three different ways of writing it. The apparent immersed weight=weight of the object- weight of the displaced fluid, Density of object/ density of fluid= weight of displaced fluid. Buoyancy was discovered as the amount of water was displaced. A real time situation would be that since buoyancy is the upward force of liquid on an object (boat). The Buoyancy acting on the rowboat is equal to the water it displaces. If the amount of water displaced is enough to carry 5 people, it would have no problem carrying one person because the water displaced on the boat to the water is more than the weight of the person so the person would float easily on the boat. Another reason could be that if you were doing the density of blocks of wood. "If you could somehow keep increasing the density of the block, it would sink lower and lower into the water. When the density increased enough to displace an amount of water whose weight was equal to the weight of the block, it would, in a since become weightless in the water"("Buoyancy Basics.) and ("Submarines)

Archimedes was a Greek Mathematician that discovered buoyancy when was taking a bath. The story goes that The Greek king asked Archimedes to find out if his crown was made up of solid gold because he thought the goldsmith slipped a few pieces of silver and took some of the gold himself. The King asked Archimedes to solve the case but the catch was that Archimedes could not touch or harm the crown in any way. The way Archimedes found the solution was that he took a bath and found the answer to the problem. He observed that when he stepped into the water, the water was displaced and when he stood up the water when back down. After he observed what happened, he found an answer to the case of the crown and was so excited, that he yelled eureka all around the street naked. He managed to find the Archimedes Principle which states that the amount of volume that is submerged into the water is equal to the water displaced.

Density of the Water is a little bit different. The Density of the water is found by this array of similar formulas. Density=mass/volume, Mass=Density*Volume, and Volume-Mass/Density. The Density of the object is that the volume of the object of the object is taking place so to find the density of the object physically requires some experimenting. You can tell if a liquid is denser than others by a simple test. If you would put different liquids in a graduated cylinder. The liquids of each objects could show how dense each liquid can be. An example is that in the bottom of the cylinder would be honey because it is the densest (then densest highest to lowest) syrup, dish soap, water, oil, alcohol, and finally lamp oil. The result of the liquid densities should be layered one by one up to the top. The Density of each object would depend on the position of the liquids. The Density of the liquids would cause the liquid to float one on top of the other. The funny thing is that the Principle of density was also discovered by the Greek scientist Archimedes. The density could be defined as how tightly matter is crammed together. To calculate the density (usually represented by the Greek letter "rho") of an object, take the mass (m) and divide by the volume (v): One of the most common uses of density is in how different materials interact when mixed together, which I am doing in my project. Wood floats in water because it has a lower density, while an anchor sinks because the metal has a higher density. Helium balloons float because the density of the helium is lower than the density of the air. There is not a instrument that specifically measures the density of objects, so you must know that density is found by mass/ volume. The density of objects are very important to many jobs dealing with science or machinery.(Leon, N. D)

Archimedes, from the previous paragraphs did a lot of work and effort to contribute to the rules of water. The Greek found the formulas and understood what the earliest contributions to the science dealing with water. The Greek inventor had a great contribution to the education and the information on finding the rules of the water. His life unfortunately ended by the Romans after they invaded his island home of Syracuse. Archimedes did all he could to defend Syracuse from the Romans. He used many of his other inventions of war to defend the powerful Roman Empire with weapons like the "Claw of Archimedes", the "Heat Ray", and more inventions. In the end, he was killed by a Roman soldiers who disobeyed orders when he was to bring Archimedes to the Roman general. When Archimedes insulted Rome, he killed Archimedes and brought the death of the one of the greatest inventors who have ever lived. Even through the death of the inventor effected the world, the world would not be like we would have known it today if he were to live. Without Archimedes, there would be no Pi, Hydraulic Screw, The Archimedes Principle, etc. The amazing thing is that historians would think that if Archimedes would have lived, the Greeks would possibly have been hundreds of years more advanced than other civilizations in their time. Archimedes was the greatest inventor who contributed to the sciences of water and his many methods of science are still used today. The (Salta, Mark) and (Biello, Dave)

Water, the importance of life has always been an important part of the people and they have used their knowledge to find out more about this beautiful natural resource. Water has always lead and nourished life as it is today and there would hardly be a living creature that does not need water to survive. The Greek philosopher and inventor was mainly the one who found rules to water. Archimedes has found the density and buoyancy of the water and was famous for his many discoveries and inventions. Water will always be very important forever for various reasons but it's main reason is to support life and cherish it with it's unique properties. The

= **Works Cited ** = Biello, Dave. "Fact or Fiction?: Archimedes Coined the Term "Eureka!" in the Bath: Scientific American." //Fact or Fiction?: Archimedes Coined the Term "Eureka!" in the Bath: Scientific American //. Scientific American, 6 Dec. 2006. Web. 24 Sept. 2013. <[]>. >
 * Scientific American is a trademark of Scientific American, Inc., used with permission © 2013 Scientific American, a Division of Nature America, Inc.

"Buoyancy Basics." //Nova Online //. PBS, 2000. Web. 25 Sept. 2013. <[]>.


 * The PBS organization is about the use of education for young students and children and could be a primary source of education to educate younger kids. I knew this was a valid site because when I truncated it, it lead to a educational website. The use of the NOVA is also a valid reason why it is accurate. NOVA is the highest rated science series on television and the most watched documentary series on public television. It is also one of television's most acclaimed series, having won every major television award, most of them many times over.

Leon, N. D. "Demsity." //Demsity //. IUN, 2004. Web. 25 Sept. 2013. <[]>.


 * Professor N. De Leon is a Professor in Indiana University Northwest, who uses online tests to help his students study and test.

Salta, Mark. "Create Lessons Worth Sharing around YouTube Videos." //TED-Ed //. TED-Ed, n.d. Web. 24 Sept. 2013. <[]>.
 * TED is a nonprofit devoted to Ideas Worth Spreading. It started out in 1984 as a conference bringing people from three worlds. Technology, Entertainment, and Desi

"Submarines: How They Work - Archimedes' Principle." //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;">Blow the Ballast! //<span style="background-color: #ffffff; font-family: 'Times New Roman',Times,serif; font-size: 16px;"> Office of Naval Research, n.d. Web. 25 Sept. 2013. <[]>.


 * This is a military site that teaches people about the archimedes principle with submarines and their density and buoyancy