Sound Unit

When molecules are very closely packed in a sound wave you will see -

The area of a sound wave where the molecules are widely spread apart is the -

The frequency of a sound is high, then -

Sound travels in -

Sound waves with frequencies above 20,000 hertz are -

__________ is how high or low a sound seems.

When sound reflects off a surface, we may hear -

Pitch is determined by the __________ of the vibrating object.

__________ is a form of energy produced and transmitted by vibrating matter.

Sound is __________ when it resonates.

Which of the following is not a medium through which sound waves can travel?

When sound waves are trapped or not able to travel any further, they are -

Musical instruments must do what in order to produce sound?

Objects vibrating faster have a __________ pitch than objects vibrating slower.

__________ is how loud or soft a sound seems.

The distance between two compressions in a sound wave is called -

Sound travels fastest through which state of matter?

When sound waves bounce off a surface, they are -

The frequency and pitch of a sound is measure in what unit?

What does letter "A" represent?

Which instrument measure the frequency of sounds?

Different pitches can be made by changing the -

The rapid back and forth motion of amtter resulting in a sound wave is -

What does letter "C" represent?

What does letter "B" represent?

The __________ of sound is the number of vibrations in a given unit of time.

What does letter "D" represent?

The device that detects the depth, size, & distance of objects underwater using sound waves is-

Sound waves that pass through a material are -

What is the range humans cannot hear?

The unit used to express the intensity or volume of sound is the -

Which technique does a boat use to find the distance to the bottom of the ocean?