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[7th Grade] [7th Grade Assignment Sheets] Geography] Language Arts] Math] Physical Science] Physical Science Unit Plan] Day 1] 2] 3] [4] 5] 6] 7] 8] 9] 10]

**Subject ** Science Formulating and Testing a Hypothesis 7th grade Ms. Wartan
 * Topic **
 * Grade Level **
 * Teacher **

45 minutes
 * Time Frame **

The goal is to perform a lab and for students to see if their hypothesis compare to their data.
 * Overall Goal/ Purpose **


 * State Standards **

questions, conduct experiments and solve problems. ||
 * **IL.10.B.1a ** || > Formulate questions of interest and design surveys or experiments to gather data. ||
 * **IL.11 ** || <span style="font-family: 'Times New Roman','serif';">GOAL: Understand the processes of scientific inquiry and technological design to investigate

**<span style="font-family: 'Times New Roman','serif';">Instructional Objectives ** <span style="font-family: 'Times New Roman','serif';">Students will create their own hypothesis before beginning the procedure. Students will learn how to collect data.

<span style="font-family: 'Times New Roman','serif';">1. Stand with clamp 2. Large paper clip 3. Ruler 4. String 5. Stopwatch 6. 5 metal washers 7. Safety goggles
 * <span style="font-family: 'Times New Roman','serif';">Materials **

<span style="font-family: 'Times New Roman','serif';">Students will solve the problem: Does the swing of a pendulum take longer for an object of greater mass?
 * <span style="font-family: 'Times New Roman','serif';">Procedures **

1. Read the whole procedure. Write a hypothesis describing how the mass of washers attached to a pendulum will affect the time of its swing. Then create a data table like the one below.

2. Put on your safety goggles. Tie one end of a string to a clamp on a stand. Tie the other end to a large paper clip. Pull out one side of the paper clip to serve as a hook.

3. Place a metal washer on the hook and let it hang down. If necessary, raise the clamp so that the washer swings freely.

4. Pull the washer back so that the string makes an angle of about 45 degrees with the stand. Have your partner measure the height of the washer above the table top. Record this height as the starting position of the washer.

5. Release the washer gently, without pushing it. During a complete swing, the washer will move from its starting position and return back again.

6. Record the time for 10 swings to the nearest tenth of a second. Then divide that time by 10 to find the average time for one swing.

7. Repeats step 5 and 6, increasing the mass each time by adding a washer. Make sure that you always start the swing at the same height.

After this experiment: 1. Graph your results

2. Use the graph to decide if your data support your hypothesis.

3. What conclusion can you draw from this experiment?

4. In a paragraph, explain how this experiment enabled you to test your hypothesis.


 * <span style="font-family: 'Times New Roman','serif';">Assessment **<span style="font-family: 'Times New Roman','serif';">The assessment will be students will perform the experiment and conclude if their hypothesis matches their data.