Phys Sc 430
Lab 2.3 Creating a Standard Curve
Purpose: To prepare and use a standard curve to determine from what height an unknown drop of blood fell.
Procedure:
1. Fill a dropper with fake blood.
2. Let the blood drip (one drop only) onto a thick, white sheet of paper from a height of 5.0 cm.
3. Repeat step 2 using heights of 10.0, 15.0, 20.0, 25.0, and 30.0 cm while making sure that each drop falls on a clean spot on the paper.
4. Carefully measure the diameter of each drop on the paper to nearest millimetre.
Data:
|
Height ( |
Blood drop
diameter ( |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.1 cm)
1 mm)
Analysis:
- Graph height versus blood drop diameter on the graph sheet provided. Be very careful with the scale.
- Place error bars on the graph to reflect the uncertainties in measurement.
- From what height did the following drop of blood fall? Explain your reasoning.
Conclusion: