Bloo Ood Spatter Analysis Lab

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Blood is an important piece of evidence at a crime scene. Blood is used for both DNA evidence and blood typing but blood spatter is just as useful. The diameter of blood drops is used to determine the height from which the blood drops fell and the blood drops shape can be used to determine the angle the blood was dropped at. Blood drops can also be used to determine the cause of death at a crime scene and blood drops can even be used to determine the medium that caused the death at the crime scene (PLTW 2016). Blood drops are also used to determine the bloods point of origin (the location of the blood source (PLTW 2016)). In the Blood Spatter Analysis lab it has already been determined that the blood next to Ginny’s body fell from a 90 degree angle. The purpose of the …show more content…
Determining how the height a drop of blood falls from affects the blood drops radius is done through experimenting by dropping the blood from varying heights. The hypothesis for the Blood Spatter Lab is that if blood is dropped from a pipette from gradually increasing heights, then the diameter of the blood drops will increase by a constant rate.
Materials and Methods The materials required to conduct this experiment are a computer, a project 1.1.6 Student Response Sheet, an Experimental Design Resource Sheet, Pipette, stand and clamp, ruler, simulated blood (red paint), and white paper. To begin the experiment collect the materials listed above on a clean flat area. After the materials are collected place the white sheet of paper on a flat surface (preferably a lab bench) and place the stand and clamp over the white piece of paper. Next, fill the pipette with the simulated blood and place the pipette inside the stand and clamp. Begin dropping one single

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