# Wednesday, 11/29/17- B Day

Question:

How do the vibrations of the different sounds compare for higher vs lower pitch notes?

1. Do Now– Copy down homework in your planner. Get out your ISN and open to page 28. Read your conclusion to your cooperative table group. Did you agree or disagree about why different objects produce sounds of different pitches?
2. Scientists’ Circle (Building Understandings)- Point out features and patterns from observations of graphs for both conditions. Calculate highest amplitude of waves and frequency of waves on both graphs. What do you predict would happen to the frequency of vibration waves if we made the stick shorter and struck it just as hard? What if we made the stick longer? Think back to what you know about how the needle and the record surface interact. What about that interaction might help explain how it could be producing so many different sounds (with different pitches and different volumes) at different points on the record?
3. Notebook work– Tape handout as flip page to ISN p.29
4. Student Graph Analysis– handout

Home Learning:

Complete Student Graph Analysis handout

# Tuesday, 11/28/17- A Day

Question:

How do the vibrations of the different sounds compare for higher vs lower pitch notes?

1. 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.”
2. 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.
3. 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.
4. 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.

Home Learning

Complete Conclusion on ISN p.28

# Tuesday, 11/21/17- B Day

Question:

How do the vibrations of the sound source compare for louder vs softer sounds?