4) Describe 3 or 4 other potential sources of error that may affect your results and explain why that will change the calculated answer. **Write each source and explanation in a separate paragraph, using complete sentences,** 5. Explain the process that allowed you to take measurements of mass and volume and determine the identity of the unknown metal.

4.) POTENTIAL SOURCES OF ERROR

• Effect of Temperature

-Density is directly affected by Temperature. Over some range of temperature, this change is insignificant. However, when the water temperature has become significantly higher than normal or if it was heated, it expands, increasing its volume. This results to a lower density. A significantly low water temperature will also result to a slightly different density calculated.

• Measurement Tool or the Kind of Weighing Balance used.

-There are different kinds of weighing scale that also have different sensitivity, accuracy and readability. Each of these could affect the density calculation especially the values of uncertainties that will be obtained. For example, a kitchen scale would be less accurate and less sensitive than a calibrated laboratory analytical balance.

• Water Evaporation

-If the water on the graduated cylinder was measured after hours already passed by there's a possibility that the water already evaporated. This could have cause an error in volume determination and with the density calculation.

• Human Error

-Humans are always subject to error. It may be because of some limitations of the human eye. Measurement determination are greatly affected by the viewing angle, accuracy of the person measuring, and also the tilts in the surface holding the graduated cylinder.

5.) Density is defined as the mass per unit volume of a substance or material. With this, you need to have the mass of an object and know its volume to determine its density. However, with irregularly shaped materials, it is impossible to accurately get the volume. Water Displacement Method is used to accurately determine the volume of an oddly shaped object. Volume is the measure of the amount of space an object takes up. When a metal object is placed in a cylinder, it pushes out of the way. The amount of water level increase corresponds to the volume of the object. The density can then be obtained by dividing the mass of the object by its volume.

Based on the calculation, the metal in this experiment has a density of 1.875 g/mL or 1.875 g/cm³. With this, we can say that the metal is either a pure Beryllium metal (1.85 g/mL density from literature) or Cesium (1.87-1.93 g/mL density from literature).