How do the vibrations of the different sounds compare for higher vs lower pitch notes?
- Do Now– Copy down today’s homework assignment in your planner. Get out your ISN and add to the Table of Contents- “Higher vs Lower Notes p.28” (Left Side); Head page 28 properly with “Higher vs Lower Notes- 11/28/17.”
- Write Pair Share– “What patterns did you notice between how the instruments & music box made different pitched sounds? Do you think there are differences in the vibrations being made as different notes are being produced? Explain.” Write the answers to the questions on ISN p.29. Pair with your cooperative table group to share your responses and come to a consensus. Share your group responses with the class.
- Investigation– Higher vs Lower Notes- Predict a graph of the shorter wooden stick pulled back about 10cm, then predict a graph of longer wooden stick pulled back the same amount. Use the probe to collect data & generate graphs to compare to your prediction. Record the graphs in Observations in your handout. Notice patterns between the graphs of the shorter wooden stick and the longer wooden stick. Answer Making Sense questions 5, 6, & 7 of handout.
- Conclusions– On ISN p.28, answer the following question: What discoveries did you make about sound sources and why different objects produce sounds of different pitches? Work in your cooperative table groups.
Complete Conclusion on ISN p.28