3-4a

**__Time Length__**
 * Scientific Method & Penny Lab ** <---Previous Assignment - **// Next Assignment--->media type="custom" key="6581739" //**
 * 1 Day
 * __Instructions__ **
 * ** // Make a new page on your wiki titled "3-4 Scientific Method and Penny Lab" // **
 * // Copy the lab & write over **the red words** with your words.. //
 * // On the same page, write what the lab asks you to write down. //

__Part 1__ Make up an experiment... you dont actually have to do it. Fill in the parts of the scientific method to your experiment below.

can be used to solve **any** problem, //**even to find a date for Friday Night!**//
 * T**he **S**cientific **M**ethod
 * Here's how to do it:**

**My Problem is - "I need a date for Friday Night".** || **What do I know, and need to know, about my problem?** **To solve my problem, "I need someone to take out Friday Night".** **Who can I take?****- Examine the possibilities.**  **- Eliminate poor choices.**  **- Consider likely choices.** || **The simplest solution is often the best solution!** **"My date will be ( //Name// )".** || **"Ask ( //Name// ) for a date Friday Night".** || **In its simplest form, there are only two possibilities:** **(1) If your person said you, the experiment succeded** **(2) If your person said no the experiment failed.** ||
 * **Step 1:**
 * State the problem.** || **You cannot solve a problem until you know exactly what it is.**
 * **Step 2:**
 * Research the problem.** || **What will it take to solve my problem?**
 * **Step 3:**
 * Form a hypothesis.** || **A possible solution to my problem.**
 * **Step 4:**
 * Test the hypothesis.** || **Perform an experiment to see if your hypothesis works. (describe what your experiment would be)**
 * **Step 5:**
 * Draw conclusions from the data.** || **Data are the results of an experiment.**
 * **Normally you would continue this process until the problem is solved!** ||

** __Part 2__ ** How is the Surface Tension of Water Affected By Soap? Introduction: Surface tension refers to water's ability to "stick to itself". Surface tension can be measured and observed by dropping water (drop by drop) onto a penny. The number of water drops that can fit on a penny will surprise you.  1. Initial Observation: Observe surface tension by seeing how many drops of water can fit on a penny.

 Number of Drops ___

 Purpose: To determine the affect of soap on water's surface tension?  2. Make a hypothesis for the previous purpose. (more or less drops) Write your hypothesis below.

 3. Test your hypothesis by comparing the number of drops of tap water that can fit on a penny to the number of drops of soapy water that can fit on a penny. Because water drops may vary depending on how well you drop the water, it is best to run many trials and take an average. Record your data in the table below <span style="font-family: Arial,Helvetica,sans-serif;">4. Analyze the data and draw conclusions. State your conclusion and say if your hypothesis was right.
 * || <span style="color: #ff0000; display: block; font-family: Arial,Helvetica,sans-serif; text-align: center;">Trial 1 || <span style="color: #ff0000; display: block; font-family: Arial,Helvetica,sans-serif; text-align: center;">Trial 2 || <span style="color: #ff0000; display: block; font-family: Arial,Helvetica,sans-serif; text-align: center;">Trial 3 || <span style="color: #ff0000; display: block; font-family: Arial,Helvetica,sans-serif; text-align: center;">Trial 4 || <span style="color: #ff0000; display: block; font-family: Arial,Helvetica,sans-serif; text-align: center;">Trial 5 || <span style="color: #ff0000; display: block; font-family: Arial,Helvetica,sans-serif; text-align: center;">Average ||
 * <span style="color: #ff0000; font-family: Arial,Helvetica,sans-serif;">Tap Water ||  ||   ||   ||   ||   ||   ||
 * <span style="color: #ff0000; font-family: Arial,Helvetica,sans-serif;">Soapy Water ||  ||   ||   ||   ||   ||   ||

<span style="font-family: Arial,Helvetica,sans-serif;"> 5. Identifying vocab. The independent variable is what you change in an experiment. What is the independent variable? The dependent variable is what changes as a result. What is the dependent variable?