Blood Spatter Lab Report

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The hypothesis for the Blood Spatter Lab is that if blood is dropped from a pipette from gradually increasing heights, the diameter of the blood drops will increase at a constant rate. The hypothesis was proved correct because in the experiment, the higher the height the blood was dropped from, the larger the diameter of the blood drop. The data collected in the experiment represents the height the blood was dropped from over the diameter of the blood drop. The data shows that the higher the blood is dropped from, the larger the diameter of the drop will be when it hits the surface. This is proved true by the fact that “the diameter of the bloodstain is dependent upon the distance the drop falls to the horizontal surface as well as the volume of the blood drop” …show more content…
While the average volume of a drop of blood is 0.05 ml this volume could vary based on the amount of pressure applied to the pipette when dropping blood (Bloodstain Pattern Analysis). Even a slight change in the volume of a blood drop could lead to a significant change in the diameter of the blood drop compared to the blood drops excepted diameter. To improve the recording of data and prevent sources of error from occurring in the Blood Spatter experiment drop the blood from an initial height of one centimeter and drop the blood in increments of one centimeter until the height of 1.8 meters (six feet) is reached so that there is a larger sample size and a broader range of values reached. Also make sure to use additional care when dropping the blood from the pipette by making sure to apply roughly equal pressure every drop. In conclusion it is evident that the higher a drop of blood is dropped from, the greater the blood drops diameter will be until the drop height reaches six feet and the diameter stops

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