Lab Report by Berkley Morgan, Kelly Moran, and Noah Nahai

                                                                          Lab Report

                                            By Berkley Morgan, Kelly Moran, and Noah Nahai

   June 17, 2014 

Procedure: In this lab report, our group measured the mass (weight) and volume of three liquids and measured the mass and volume for four solids as well. As well as finding the mass and volume of these objects and liquids, we put them in distilled water and watched if the liquids and solids would sink or float in the distilled water. The liquids that we used in this experiment were not told to us but one seemed like sticky dense type of syrup, another seemed like a thin type of rubbing alcohol, and the last one seemed like vegetable oil and was not very dense either. Between each of these investigations with the various liquids and distilled water, we cleaned out each individual graduated cylinder and the 200 mL beaker with soap and cleaning sticks. After this long tedious process of cleaning out the graduated cylinder and 200 mL beaker between each experiment, we then calculated the density of each liquid.  After the liquid part of the investigation, we continued on to solids for which we repeated the process all over again. We got four solids and with each solid we measured the width and height. We also weighed each solid and found out the mass. We found out the volume of many of these solids by the formulas we learned in Geometry. After finding the volumes, we then calculated the density and finished the lab by cleaning everything up.

Results: The results of these liquids in the water differed. Before pouring the liquids in the water, we weighed the liquids on the scale to find the mass of each liquid and found the volume of each liquid through the mL units on the graduated cylinder. The sticky syrup liquid sank quickly to the bottom of the beaker, the thin clear liquid floated on top of the distilled water, and the last oily type of liquid also floated on top of the water. Liquid A (thick syrup like liquid that sank) had a density of 4.3 grams per mL,  Liquid B (clear fluid that floated) had a density of 3.8 grams per mL, and Liquid C (oily type of liquid that also floated) had a density of 4.1 grams per mL. The density found in these liquids makes sense because the liquid that sank (Liquid A) had the highest density and the two liquids that floated had lower densities. The results for the solids were strangely different. Solid 1 (sphere that sank) had a density of 5.7 grams per mL, Solid 2 (glass cylinder that sank) had a density of 0.5 grams per mL, Solid 3 (metal cylinder that sank) had a density of 1.2 grams per mL, Solid 4 (cone that sank) had a density of 1.3 grams per mL. Most of the solids were oddly less dense than the liquids that floated on the water and this is odd because all the solids sunk which gave our group the feeling that the solids would be more dense.

Abstract: (What we did in a nutshell) Starting out, we poured three unknown liquids into a beaker of 100 mL filled with water. The graduated cylinder held about 8-9 grams of those various liquids. We recorded how much each weighed, and if they sunk or floated when placed in the water. After cleaning up, we moved onto the solids. We recorded the height, width, length, and the weight of each, and if either of the four solids floated or sunk once placed in the water. Afterwards, we found the volume of each, then cleaned up our lab. 

pg. 14 questions 

1.) The patterns that we noticed in the data is that for the liquids the less denser liquids floated on the distilled water and denser one sank but for the solids no matter what the density was the solids all sank to the bottom of the distilled water. 

2.) Based on this lab report, we would say that most solids sink in water and that most liquids float in water. 

3.) To support our answer for question 2, only one liquid sample floated in the water and no solid samples that we had floated but only sank in the water. 

4.) We concluded that the olive oil is most likely less dense than the vinegar. 

5.) a.) Our predictions were that we thought some liquids and solids would either float or sink depending on the density of the liquid or solid (which is true) but we didn't think there would be as many sinks for solids and floats for liquids.
     b.) I think our prediction was accurate in that whether the object sinks or floats depends on how much density it has but we were incorrect in that we thought more that one liquid would sink and that some solids would float.

6.) The object will still sink because the density will not change if you cut the solid in half.

7.) You could possibly predict the floating/sinking behavior of a solid in rubbing alcohol by finding it's density and by the density whether low or high assuming whether it would float or sink.

8.) You could predict the outcome for the sphere by finding it's density. 

Here are some photos of are Lab Experiment!! 

  

Thank you!