How much do you know?
1. What causes a sound wave to form?
2. What type of wave is a sound wave?
3. Sound waves need a _________ to travel through. (Answer in the answer key)
4. What is the unit to measure loudness?
5. Ultrasonic sound refers to anything _______________. (Answer in the answer key)
6. What are two examples of the reflection of sound waves? (Answer in the answer key)
7. What three factors effect the speed of sound? (Answer in the answer key)
8. The higher the _________ the higher the frequency. (Answer in the answer key)
9. The sound waves in front of a moving object ______________ .