G 8 Revision pack

Does sound travel faster in hot air or cold air?

• Cold air

• Hot air

Sound can travel in a vacuum.

• True

• False

Hard foam is good at both reflecting and absorbing sound waves.

• True

• False

Which of the following is NOT a way that waves interact with matter?

• Waves can be reflected by matter.

• Waves are affected by gravity.

• Waves can change direction when they travel from one material to another.

• As waves pass through matter, some of the energy they carry can be transferred to matter.

Sound waves travel fastest through which of the following?

• Air

• Pyrex glass

• Water

• Rubber

Movie theaters use sound proofing to reduce echoes. Soundproofing materials are designed to __________the sound.

• Transmit

• Absorb

• Diffract

You can hear sounds around the corner of a door due to the wave interaction called ______________.

• Transmission

• Absorption

• Diffraction

• Refraction

___________ occurs when the speed of a wave changes as it goes from one medium to another.

• Refraction

• Diffraction

• Absorption

• Transmission

Which best describes the type of wave that sound is?

• Transverse

• Longitudinal, Compression, Mechanical

• Electromagnetic

• Perpendicular

A sound wave takes about 0.03 s to move through a material that is 10.3 m long. What is the material?

• air

• glass

• iron

• water