Introduction In the density lab unknown metals were weighed using beakers filled with water and an electronic scale. First the metal objects were weighed using an electronic scale. Then using water, the beakers were filled half way. Next, the metal objects were poured in. Then the amount of how much the water rose after the metal was put in is checked. Lastly, record the data and clean the objects used and put away. Design Research question: If mass and volume are correctly measured can the density of an unknown metal be calculated.
Variables: Controlled: Water, Electronic Scale, Graduated Cylinder Dependent: Density; Mass and Volume Independent: Metal(s) Method Apron, Goggles, Electronic Balance, Beaker, Graduated Cylinder, water, unknown metal samples Labeled Diagram Uncertainties: Electronic Balance 01 g Hexagon Ml Graduated Cylinder В± 1. 0 ml The independent variable is measured based off the how much the water rises. The dependent variable Is measured when the Initial Volume Is subtracted from the final volume, which gives the density of the metal sample. Controlling the Controlled Variables: The water and electronic scale were controlled.
These materials were controlled because the amount of water put into the graduated yielder could differ, and if the scale is not zeroed again after putting down the paper towel the mass could be greater than the actual mass of the metal. Procedure: Wear Safety apparel. Weigh the metal using a piece of paper to protect the scale. After placing the paper on the scale, zero the scale again, then carefully place the metal on the scale. Then record the mass of the metal. Fill the graduated cylinder using a beaker with 50 ml of water (initial volume). Place the metal into the water. Record the new volume of the water with the metal (final volume).
The graduated cylinders and scale were helpful and made it easier to find the volume. The method used was weighing the metal, placing it in the graduated cylinder, then recording the weight. The time spent on the lab should take about 30 minutes Improvements The lab went well. Time management was used appropriately. It was a team effort. There were no errors in the lab performed. More repetitions of the experiments would give a better understanding of the experiment. Also if there were a way to get a more precise measurement the results would be more accurate.