Unit 2 Assignment: Blood Stain Experiment
In this experiment you will make a simulated blood sample that you will use to study blood stain patterns produced by varying the dropping distance and impact angle of blood drops.
Materials
* measuring cup
* tablespoon
* teaspoon
* corn starch
* corn syrup
* red and green food coloring,
* white glue
* numerous (45 to 50) sections of white poster board measuring 6 by 6 inches
* plastic drop cloth
* eye dropper
* protractor
* pencil
* tape measure
* objects to support the cardboard sections at different angles
Producing the Simulated Blood
1. Mix 4 tablespoons of cornstarch with 2/3 cup of corn syrup and mix thoroughly.
2. Place 3 teaspoons of this mixture into a separate container.
3. Add 3 to 5 drops of red food coloring.
4. Add two drops of green food coloring to create a colored liquid that looks like natural blood. If necessary, add additional drops of red and green food coloring until you are satisfied that the liquid simulates the color of blood.
5. Add 1 to 2 teaspoons of white glue to make the 'blood' more opaque and realistic looking.
6. Stir the liquid and lift the spoon to check that the 'blood' has a natural consistency. If necessary, add additional corn syrup or white glue to create the desired effect.
7. If the end product turns out too thick, dilute with water.
**Alternate method of producing simulated blood: Another method of producing simulated blood involves the addition of red and green food coloring to fresh whole milk. This simulated blood has a very close consistency to that of actual blood. This may not look like blood but should provide results very closely resembling real blood stain patterns.
Blood Stain Experiment
1. Place the drop cloth on the floor and begin performing the blood stain pattern studies.
2. From a height of 6 inches, add one or more drops of simulated blood with...