Waves Test Review

All waves ____. (Mark all that apply)

• have a back-and-forth pattern of motion

• transfer energy

• have the same frequency

• travel through a medium

• give off light

An ocean wave has a frequency of 0.5 waves/second, and a wavelength of 10 meters/wave. Use the speed equation (v = f x λ) to calculate the speed of the wave. What is the speed of the wave?

• 50 m/s

• 5 m/s

• 0.5 m/s

• 2 m/s

A student says a word and you hear it. Describe how a sound wave is created when the student speaks.

• A sound wave is created by the vibration of the student's vocal cords, which compresses and rarefies the air particles, creating a wave that travels through the air to your ears.

• A sound wave is created by the movement of the student's lips, which directly sends sound particles to your ears.

• A sound wave is created by the student's brain sending signals directly to your ears.

• A sound wave is created by the student's hand movements, which generate sound particles that travel to your ears.

A student says a word and you hear it. Describe how the sound wave travels from the student's mouth to your ear if you are standing nearby.

• The sound wave travels through the air as a series of compressions and rarefactions.

• The sound wave travels through the air as a series of light waves.

• The sound wave travels through the air as a series of electrical signals.

• The sound wave travels through the air as a series of magnetic fields.

A student says a word and you hear it. Describe how the sound waves travel from the student's mouth to your ear if you are in separate cities and you each have a phone.

• The sound waves travel directly through the air from the student's mouth to your ear.

• The sound waves are converted into electrical signals by the phone, transmitted over the network, and then converted back into sound waves by your phone.

• The sound waves are transmitted through a series of tubes connecting the two cities.

• The sound waves are carried by pigeons trained to deliver messages.

The student increases the amplitude of his voice. Mark an X next to each sentence that is true.

• The pitch will increase.

• The frequency will increase.

• The sound will be louder.

• The wavelength will increase.

• The sound wave will transfer more energy.

Which wave has the highest amplitude?

• Wave A

• Wave B

• They are the same.

Which wave has the highest frequency?

• Wave A

• Wave B

• They are the same.

Which wave has the highest energy?

• Blue

• Green

• They are the same.

• Red

The wavelength of wave A is ______.

• 4 cm

• 10 cm

• 20 cm

• 5 cm