Teacher Portal: Sound Waves and Pressure Investigation 1 Back to Sound Waves and Pressure I Sound Waves and Pressure: Investigation 1 - Concept Day I Sound Waves and Pressure: Investigation 1 - PreLab I Sound Waves and Pressure: Investigation 1 - Lab I Sound Waves and Pressure: Investigation 1 - PostLab Sound Waves and Pressure: Investigation 1 - Mathematics Concepts length in cm and meters frequency data table skip counting by 10 greater than/less than/equal to (in)direct relationships patterns/trends sequence Vocal Cords Vibrate to Produce Sound Sound Waves and Pressure: Investigation 1 Quiz