Sound and Tectonic Plates Quiz

What determines the loudness of a sound?

• Frequency of the sound wave

• Amplitude of the sound wave

• Wavelength of the sound wave

• Speed of the sound wave

What happens to the pitch of a sound when the frequency increases?

• The pitch becomes lower

• The pitch stays the same

• The pitch becomes higher

• The loudness increases

What type of wave is sound?

• Transverse

• Longitudinal

• Electromagnetic

• Stationary

What happens to the amplitude when sound waves reinforce each other through constructive interference?

• It decreases

• It stays the same

• It doubles

• It cancels out

Why do sound waves become quieter as they travel further?

• The speed of sound decreases

• The energy spreads out and dissipates

• The frequency decreases

• The amplitude increases

Which of the following uses destructive interference?

• Noise-canceling headphones

• Musical instruments

• Loudspeakers in a concert

• Echo location

When two sound waves meet and cancel each other out completely, what happens?

• The sound becomes louder

• The sound disappears

• The sound becomes softer

• The sound changes pitch

Two tuning forks with the same frequency are struck but are slightly out of phase. What happens?

• The sound becomes louder than normal

• The sound alternates between loud and soft

• The sound is unaffected

• The sound is completely canceled

Which term describes the number of wave cycles per second?

• Amplitude

• Wavelength

• Frequency

• Velocity

If the amplitude of a wave is increased, what happens to the loudness of the sound?

• The loudness increases

• The loudness decreases

• The loudness stays the same

• The pitch changes