Hanna Gibson, Meghan Williams, Celsey Gilliam

Blood Splatter Analysis Lab:

Problem statement: Was Anna Garcia hit standing up or was she on her way down?

Hypothesis: If blood is dropped at different heights, then the higher the drop is released at the larger the diameter will be.

Independent variable: the height at which the blood was dropped at

Dependent variable: the diameter of the blood splatter

Materials:

Pipette or bottle with eye-dropper Micropipette Ring stand and clamp Meter stick or measuring tape Simulated blood White paper Paper towels Gloves Lab coats

Experimental Design:After properly putting on all appropriate PPE, go and collect needed materials (white paper, simulated blood, meter stick, and a pipette). Then take and collect simulated blood into a pipette, and lift the dropper to a 90 degree angle from the white paper. Drop one drop of simulated blood onto the white paper at a height of 10 cm. Repeat the dropping process at heights of 20 cm,40 cm, 60 cm, 80 cm, and 160cm Then measure the diameter of each of the blood splatters, and record the data on a line graph. With the independent variable of height released at on the x axis and the dependent variable of the diameter size on the Y axis. To prevent any possible occurring safety concerns make sure that the blood is dropped directly and precisely over and onto the white paper so that the blood will not contaminate any surfaces or yourself. Be reminded that the content inside the blood in unknown.

Summary:

Hanna Gibson, Meghan Williams, Celsey Gilliam

The collected data that proves that when blood is dropped at 20 cm the diameter of the splatter is 15mm. Opposed to when blood was dropped at 160 cm the diameter of the splatter was 21mm. This also indicates that as the height of the drop is increased so is the diameter of the blood splatter.

Carry out Experiment:

Height dropped at The diameter of the splatter10 cm 12 mm20 cm 15 mm40 cm 16 mm80 cm 20 mm160 cm 21 mm

Analyze data:

Hanna Gibson, Meghan Williams, Celsey Gilliam

Conclusion: Our data collected from the experiment supported our hypothesis that stated if blood is dropped at different heights, then the higher the drop is released at the larger the diameter will be.