What effect does release height have on the diameter and shape or blood stains?
In this activity you will explore the relationship between release height and droplet size.
Work within groups of 2-3.
Equipment
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Pipette/eye dropper
1m ruler
Synthetic blood
Graph paper
Paper and White tile.
Newspaper as protection for the floor
Safety wear – goggles, labcoat, gloves
Method
Arrange newspaper on the floor and decide whether to place white paper or white tile on
top first
Fill the dropper with synthetic blood.
Hold the dropper 50cm from the tile/paper.
Release blood.
Measure the diameter of the droplet in mm and record results in the table attached.
Table 1: Influence of height on the diameter and shape of blood stains.
Surface ______________________________________________
Height (cm)
Amount of blood (mls)
Diameter of splatter (mm)
Shape/observations
50
100
150
200
250
Table 2: Influence of height on the diameter and shape of blood stains.
Surface ______________________________________________
Height (cm)
50
100
150
200
250
Amount of blood (mls)
Diameter of splatter (mm)
Shape/observations