8. What is the phenomenon called that changes the 14. The number of cycles of a wave occurring in a pitch of a sound as an ambulance drives by? certain amount of time is called the Sonic Boom b. Standing Wave a. Wavelength C. Resonance b. Period d. Doppler Effect C. Frequency d. Medium 9. What is the phenomenon called when two waves combine and create a bigger wave? 15. The refers to the material a a. Constructive Interference wave travels through. b. Doppler Effect a. Wavelength C. Destructive Interference b. Period d. Resonance C. Frequency Medium 10. What is the phenomenon called when an object vibrates with an increasing amplitude due to a 16. The determines how sound oscillating at its natural frequency? much light will bend and change speed. a. Sonic Boom Medium b. Standing Wave b. Index of Refraction c. Resonance C. Speed d. Doppler Effect d. Frequency 11. Which type of wave transmits energy by moving the position of the medium particles perpendicular 17. Which type of wave does not require a medium to to the direction the energy travels? travel through? a. Transverse a. Transverse b. Sound b. Sound c. Longitudinal c. Longitudinal d. Electromagnetic d. Electromagnetic 12. Which type of wave moves both energy and the particles in the same direction as the medium? 18. What is the phenomenon that occurs when an a. Transverse object travels faster than the speed of sound? b. Sound a. Sonic Boom c. Longitudinal b. Standing Wave d. Electromagnetic c. Resonance d. Doppler Effect 13. The relationship between wavelength and frequency is 19. What is the phenomenon that creates a point on a a. Direct wave that does not oscillate up or down? b. Linear a. Sonic Boom C. Inverse b. Standing Wave d. There is no relationship C. Resonance d. Doppler Effect