Sound Review

Sound travels FASTEST through which of these materials?

• Air
• Empty space
• Metal
• Water

Sound is caused by? 

• force
• vibrations
• instruments

This word refers to any substance that sound can travel through.  Sound can travel through solids, liquids, and gases.

• Decibel
• Medium
• Vibration
• Oscilloscope

Why is sound able to travel faster through a solid than a gas?

• Gas molecules are packed tightly.
• Sound does not travel faster through a solid than a gas.
• Solid molecules are packed tightly.
• Gas molecules move slowly.

Sound will travel slowest through which of the following forms of matter?

• milk
• desk
• air
• door

Why does cupping your hands around your mouth when you shout make the sound travel further?

• The sound spreads out.
• Your voice gets louder.
• You are screaming.
• The sound energy is directed in one direction.

Sound is a(n) _____________ wave.

• electromagnetic

• mechanical

• transverse

• compressional

True or False: Sound travels slower than light.

• True

• False

When a sound echoes, the sound is _____________ off of surfaces.

• reflecting

• absorbing

• refracting

Soft surfaces are ____________ sounds and making a room quieter.

• reflecting

• absorbing

• refracting