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

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

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

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.

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

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

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

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

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

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

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)