Friday, October 2, 2009

Blog Entry for Blood Spatter Lab One

Question 1:

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

Answer:

Having multiple drops from each height made it so that if something went wrong with one drop, there were two other times to correct your mistakes. Also, if something went wrong that you were unaware of, having multiple drops is a great way to realize your mistakes. If you only drop the blood from each height once, it is extremely likely a drop will go wrong, throwing off the results.

Question 2:

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?

Answer:

The higher the blood was dropped, the messier the spatter was (typically). Sometimes, there were multiple drops or splashes that occurred when blood was dropped from high heights. Other times, it ran down the side of the ruler. Still others, a bubble of air formed in the droplet, causing the drop to change. Only if no problems occur will you be able to make good inferences about the height the spatter was dropped.

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