1. 5*4 Sounds from Vibrating Air
WDYS? .
WDYT?
Flutes and organ pipes produce sound by _____. The sound depends on the 1)_____, 2) _____ and 3)_____ of the air column.
Long pipes = _____ pitch & frequency while short pipes = _____ pitch & frequency

2. 5*4 DEMO(p518) Part A: Vibrations in Tube-Shaped Instruments
2c) The shorter the straw, the _____ the pitch.
3b) When the bottom of the straw is COVERED, the pitch is much _____.
4c) The shorter the air space in the tube, the _____ the pitch.
5a) The air molecules in the straw are _____.
5b) The test tube and bottom covered straw are(similar/different) because _____.

3. 5*4 NOTES Compressing Air to Make Sound
Sound is a compressional (_longitudinal__) wave, where air squeezes together (_compression_) or spreads out (_rarefaction_)
Air (in the straw) is the __MEDIUM_ through which sound waves travel!!!

4. 5*4 Physics Talk(p521) 2. Wave Diffraction
Diffraction  sound waves travel by _bouncing off__ OR ___bending__ around barriers OR _spreading out____ as they emerge from an opening
Draw and Label the diagram:

5. λ is INVERSELY related to f
5*4 Physics Talk(p521)
3. Vibrating Columns of Air
The sound heard from straw & test tube was produced by a ____vibration___________ in air.
Draw and Label the 2 pictures: .
λ is INVERSELY related to f