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Massing Grown Crystals Essay

1128 words - 5 pages

In order to understand the concept of finding the relationship between mass in air and mass in water, I needed to recognize the format of massing different substances with irregular shapes, sizes, and consistency. For my experiment, I needed the following information to help me understand why and how this project works.Mass is the amount of matter in an object. In everyday use the word weight is often used incorrectly to mean mass. Mass can also mean "resistance to acceleration". I would measure solids by massing and displacement of water. I would find the volume using displacement of water. I would do this by subtracting the object plus water by the water alone. Having the mass and volume, I can find the density.Solids are much denser than liquids and gases. Closely packed molecules of solids gives them a definite shape and volume. The molecules are so close that they cannot move freely, like they do in gases. All they can do is vibrate and spin on the spot. In most solids, the molecules are set in a regular pattern, they are in the form of a crystal. When these crystals are heated, they melt to a certain temperature. This is called the melting point. As a solid melts, its temperature stays at the melting point until there is no more of that solid remaining. Some solids, like glass, have no crystal structure and no particular melting point, but they do become more pliable as it gets warmer. For example a glass blower will heat the glass to a certain degree so that it is so pliable, that they can shape it into objects.In a liquid, molecules are held only loosely together, allowing it to flow in all directions.When a solid melts to a liquid, it changes immensely. Liquids take up about 10 percent more.space than a solid. When ice melts, the ice stays at 0 degrees Celsius until it all has melted.Water is commonly found in the three states of matter, solid ice, liquid water, and gaseous water vapor. Water does not melt above 0 degrees Celsius and does not boil until 100 degrees Celsius. It is denser as a liquid than as a solid. This is why it expands when it freezes. When ice forms, water expands by one-eleventh. Molecules in a liquid are always moving. Some may have enough energy to escape the bonds, helping the liquid to evaporate to a gas. The higher the temperature of the liquid, the more the molecules escape.Solutions are the most important of all mixtures. Solutions can be solids mixed with solids or gases mixed with gases, but they are mostly used mixed in a liquid. Every solution has two main elements: solvent, which is the liquid that forms , and the solute , the substance which dissolves in it. When a solution is mixed the solute and solvent might seem like they have become one part, but they are still chemically separate. The molecules of the solute are in the spaces between the molecules of the solvent. The solute can be added to the solvent when all of the spaces are filled up. When this happens no more of the solute will dissolve and...

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