1. Table of Contents
Sep 4-6
Drops of Water Lab
Page 5-

2. Write in both in TOC & top of P. 6
Lab: Drops of Water
Write in both in TOC & top of P. 6

3. Drops of Water Question:
How will the addition of soap affect the number of drops that a penny will hold without spilling?

4. Drops of Water Background:
Explore surface tension by making water & alcohol drops of various sizes on wax paper. Record your observations.
Summarize in a few sentences & drawings in your notebook.

5. Drops of Water Hypothesis:
Explain your plan, your prediction and your reasoning
Use the words
If …
Then …
Because …

6. Drops of Water Procedures: Identify variables: List materials:
The manipulated (changed) variable is -
The responding (result) variable is -
The controlled (kept the same) variables are -
The experimental control (baseline/starting) treatment group is –
List materials:
Describe the steps:
Directions that someone could follow
Measurements that will be recorded
Number of trials that will be repeated

7. Drops of Water Data and Observations:
Draw a data table & create a title for it
Include a heading at the top of each column
Include a row for each trial, and a row for the average

8. Drops of Water
Trial
Water
Soap & water 1 2 3 4 5
Average

9. Show Data in a Bar Graph Use full page for all graphs Write in pencil
Include Title
Include Y-axis label & numbers
Include X-axis label & category names
Include Key if appropriate

10. Conclusion Before writing your conclusion:
Study the article on soap to help you understand how soap and water interact.

11. Drops of Water Conclusion:
Question – restate & answer the question, tell whether your hypothesis was supported or not
Supporting Data – state the summary numbers from your data that support your answer (high, low, average)
Explanation – describe your reasoning and any unanswered questions that may need further research (must relate to your understanding of surface tension)