Blood Splatter

How did multiple drops at each height affect your results? What is the purpose of multiple trials in an experiment?

I think that when we did multiple drops at the same height it would ensure the accuracy of the blood drop/splatter. This would help us because one drop doesn’t really give us much data to be sure we had gotten the right diameter. While 3 drops gives us a good idea of how big the diameter was and what the average is of all three, which gives us much more accurate data. For example, every once and a while during the experiment air bubbles would come and there would be more air than blood. Which resulted in the blood splatter being very small for the height we dropped it at. If we had only done one drop we would have never known the drop should have been bigger. That would give us the incorrect data and it wouldn’t help us later on.

What did you discover about the influence of height on blood diameter in a blood spatter? Could you now accurately infer the height at which a blood drop originated based on the diameter of a blood spatter? Why or why not?

My partner Kyla and I discovered that the higher we would drop the blood from, the bigger the blood splatter’s diameter would be. We also discovered that when we got higher the blood splatter’s diameter got bigger. Also in class when we saw the blood splatter A,B, &C we could infer that A was the most like what we had done because it looked the most similar. And although it was a little bit bigger we could also infer that it was from higher up or from a different angle, because of what we had tested that day. We could do that by comparing the blood splatter’s diameter with the information that we collected.