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The Effect of the Viscosity of Blood on the Distance of Arterial Spray.
TITLE: The effect of the viscosity of blood on the distance of arterial spray.
HYPOTHESIS: If the viscosity of blood increases, then the distance of the arterial spray will decrease.
Independent Variable (IV)- Viscosity of blood
Levels of the IV: Thin, Normal, Thick
Number of Trials for each level: 3
Dependent variable (DV)-Variable that is measured: Distance of Arterial Spray
Constants (factors that are kept the same to minimize error): person, height of spray bottle used
1) Mix blood into three different viscosities
2) Put measurements on the cardboard
3) Spray thin blood three times from 50 centimeter height
4) Measure distance travelled by spray
5) Repeat steps 3+4 for normal and thick viscosities
1) The purpose of the experiment was to discover the effects of visosity on the distance of arterial spray.
2) The findings were that the average distance decreased from around 226.2cm to 162.3as the viscosity increased from thinned blood to thickened blood.
3) Our hypothesis was supported by the data.
4) The increased range was likely caused by the fact that thinner blood could exit the spray bottle at a higher velocity than the thicker blood.
5) The experiment could be improved by increasing the number of levels of viscosity and measuring the levels specifically.
Potential Applications:
The data could be used in cases with an unknown victim, to rule out or add evidence to a missing person who was on blood thinners or had a medical condition that affected their blood thickness, like anemia.
Introduction
The Effect of the Viscosity of Blood
on the Distance of Arterial Spray.
Why did we conduct the experiment?
To measure the effects of viscosity on the distance the blood travels.
What did we hope to learn?
The effects of viscosity.
Our hypothesis:
If the viscosity of blood increases, then the distance blood travels will decrease.
Alex Harper, Haden Crowe, Kyle Farthing
Materials:
Fake blood
Thin: 1 part water, 2 parts corn syrup, red food coloring
Normal: 1 part water, 3 parts corn syrup, red food coloring
Thick: 1 part water, 4 parts corn syrup, red food coloring
Cardboard
Spray Bottle
Meter Stick
The Effect of Viscosity on the Distance of Arterial Spray
Procedure
Average
Trial 1
Trial 2
Trial 3
Viscosity
Thin
226.2cm
225cm
263.5cm
190 cm
188cm
198cm
168cm
184.7cm
Normal
125cm
160cm
202cm
162.3cm
Thick
Conclusion:
Pictures of Thin Trial
Pictures of Thick
Trial
Pictures of Normal Trial