| A | B |
|---|
| vibrate | to move back and forth |
| compressions | an area where the molecules are more tightly packed together |
| rarefactions | an area where the molecules are farther apart |
| transverse wave | The wave moves at right angles to the medium. |
| longitudinal or compression wave | The wave moves in the same direction as the medium. Sound is an exmple. |
| intensity | The energy or strength that a wave has. |
| decibels | easures the intensity or strength of a wave |
| volume | how we interpret the intensity of a sound. |
| pitch | how high or low a sound appears; a measure of the frequency of a wave |
| frequency | the number of vibrations per second |
| cycle | one complete back and forth vibration |
| Hertz | Frequency is measured in this. Human hearning ranges fro 20-20,000 __. |
| ultrasound | These sound waves are used to see inside of the human body. |
| echo | a sound wave reflected back to its source |
| sonar | These sound waves are used to map the ocean floor. |
| reflect | to bounce back |
| decibel | measures the intensity of a sound |
| wavelength | the distance between the crests of a wave |
| amplitude | increasing this produces and louder sound |
| sound waves | travel more quickly through solids than air because the molecules are more tightly packed together |
