Focus Question:
How do the vibrations from a sound source compare for higher-pitch versus lower-pitch sounds?
Learning Tasks:
- Do Now– Please get out your ISN. Add to the Table of Contents: “Motion Detector 2 p.72” (Left Side). Head p.72 properly with “Motion Detector 2-3/3/2020.”
- Investigation– Predicting & Testing Sticks of Different Lengths- On the “Pitch Graphs” handout, draw what the graph would look like when the stick is at rest. Draw an arrow pointing to that line on each graph and label it “stick not moving.” Predict what the graph would look like for long stick/low pitch vs short stick/high pitch on both your Condition 1: Long stick and Condition 2: Short stick graphs using a dashed line. Label these lines “prediction” on both graphs. Then observe Test Condition 1 as we push the long stick 10 cm. After the test, draw a solid line and label it “actual.” Repeat for Test Condition 2: Short stick.
- Simulation– Speaker’s Motion– This simulation will graph the motion of the speaker while it’s making sounds. Observe low and high pitches. Sketch the speaker graphs on ISN p.72. Title the graph sketches for which sound is which and label the axes.
- Data Analysis from Speaker & Stick Data– Observe the four graphs from the speaker & stick data. On ISN p.72, write the heading “Data Analysis.” Look for similarities and differences within and among the graphs. Point out patterns & important features of the graphs. Write complete sentences starting with “What I see ….”
- Notebook Work– Tape the “Pitch Graphs” handout as a flip page to ISN p.72.