Title: Drops on a Penny Lab (1pt)
Purpose: Compare how many soapy H2O drops and clean H2O drops will fit on a tarnished penny compared to
a clean penny. (1pt)
Hypothesis: ANSWER THE ?: Which combination of water type and penny type will hold the most drops?
H2O type-_____________& Penny type-______________ (2pts)
Materials: (6pts)
1. tarnished penny
2. Polished penny
3. Soapy water
4. Clean water
5. 1 dropper for soapy water
6. 1 dropper for clean water
Procedure: (Do not copy this section to your lab write up. Write “see overhead”.)
1. Obtain materials
2. Count number of drops of clean water the tarnished penny will hold
3. Count number of drops of soapy water the tarnished penny will hold
4. Count the number of drops of clean water the polished penny will hold
5. Count the number of drops of soapy water the polished penny will hold
6. RECORD RESULTS ON WHITE BOARD!!!!
7. Clean up work stations – Soapy water droppers go ONLY to soapy water dropper jar. Clean water
droppers go ONLY to clean water dropper jar.
8. Draw a bar graph explaining your results in results section after table
Results: (5pts)
Penny type
Tarnished
Polished
Average # of drops of clean water
Average # of drops of soapy water
Group
Group
Class
Class
Graph: Graph the class data here. (ONLY CLASS DATA) (6pts)
Conclusion: (5 Step Conclusion) (PHALE) (5pts)
Answer the following questions using complete sentences.
1.
2.
3.
4.
5.
Restate the Purpose of the experiment.
Was your Hypothesis correct and why? (Do you accept or reject your hypothesis and why?)
What are some real world Applications the topic from this lab?
What did you Learn?
What are some sources of Error?
Total 26 pts