Directions. Read each item carefully.write the letter of the correct answers before the numbers
​6. The highest part of a wave
A trough
B. amplitude
C. crest
D. wavelength
7. Is the matter that a wave travels through
A avenue
B. medium
C. gaps
D. vacuum
8. A wave where the disturbance travels in the seme direction as the wave.
A. transverse
C. mechanical waves
B. longitudinal
D. electromagnetic waves
9. The lowest part of a wave.
A trough
B. amplitude
C. crest
D. wavelength
10. In softball, what kind of energy is being formed as the batter applies force to the bat?
A. electrical energy
C. sound energy
B. kinetic energy
D gravitational energy
11. It signifies the original position of the medium
A. crest
B. amplitude C. line of origin
D. trough
12. A kind of electromagnetic waves used to broadcast radio & television
A. X-rays
B. gamma rays C. visible light D.radio waves
13. These are examples of longitudinal waves EXCEPT.
A. sound waves
C. seismic P-waves
B. ultrasound waves
D. npples on the surface of water
14. Causes oscillations in electrical and magnetic fields.
A. mechanical waves
C. electromagnetic waves
B. longitudinal waves
D transverse waves
15. The highness or lowness of sound
D. timbre
A. decibel
C. duration
B. pitch
16. Refers to the tone color, or "feel" of the sound?
D. pitch
A. timbre
C.decibel
B. amplitude
17. Vibrational frequencies beyond 20 000 Hz.
A. ultrasonic frequencies
B. infrasonic frequencies
18. The unit of intensity for sound is decibel (dB), which was named after
A. Michael Faraday
C. Thomas Edison
B. Alexander Graham Bell
D. John Dalton