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Soundwaves and Pressure
Investigation 2
Investigation 2
Soundwaves and Pressure
Phase 1 – Defined Understanding
Student Guide
Download and Distribute
Access Teacher Guide
Student Guide with answers
Teacher PreLab
Prepare for the Experiment
Phase 2 – Dynamic Understanding
► Investigation Two Summary – Frequency and Speed of Sound
In Investigation Two, you calculated the speed of sound in air using tuning forks of three different frequencies. During this Investigation, you:
1. Used a 1000ml graduated cylinder filled with water, a PVC pipe, and tuning forks to explore frequency and length.
2. Calculated the speed of sound using the following formula:
Speed = wavelength X frequency
► Investigation Two Summary – Learning Goals
Through these experiments, you concluded that:
1. The speed of sound in air is approximately 324 meters per second.
2. In the same type of matter, the speed of sound does not change if two sounds have different frequencies or wavelengths.
3. There is an inverse relationship between wavelength and frequency. A wave with a high frequency has a short wavelength and a wave with a low frequency has a long wavelength.
Concept Slides
Launch and Discuss
Mathematics Concepts in This Investigation
- calculating speed (m/s)
- frequency in Hertz
- (in)direct relationships
- patterns/trends
- estimation
- multiplication
- division
- greater than/less than/equal to
- volume in mL
- metric conversion
- length in cm and meters
- data table
- data analysis
- decimals to the nearest tenth, hundredth, thousandth
- fractions
- manipulating mathematical formulas