The harmonic motion of a boy on a swing is like the motion of a(an) _______________________.

A pendulum is a kind of ________________ in that it has repeating cycles of motion.

The note A in the musical scale has a(n) _________ 220 Hz.

One unit of harmonic motion is called a(n) _______________.

The motion of a girl running is called ____________, and the motion of a girl riding a Ferris wheel is called _______________.

The formula for _____________ is the inverse of the formula for frequency.

One ___________ equals one cycle per second.

When the periodic force matches the natural frequency of an object, the object experiences _______________.

To have a high ________________ on a swing, your friends needs to push you with a large __________.

When I hit a drum, it will vibrate at its _________________.

A(n) __________ is a travlling oscillation.

The distance from one crest to the next is a wave's ____________.

The process of a wave bouncing off a surface is called __________.

____________ is the process of the amplitude of a wave diminishing as it enters another material.

The __________ of a plane wave is perpendicular to the direction of the motion of this wave.

The crests of ______(s) look like parallel lines.

__________ is when waves bend when they enter another material and _________ is when waves bend around an object or outward after exiting a hole.

If you disturb water in a single point, ________(s) will be created.

The amplitude of two waves will cancel when ______________ occurs.

The amplitude of two waves get larger when __________ occurs.

Sound waves are examples of this kind of wave: ____________.

Water waves are examples of this kind of wave: ____________.

What type of waves is Mr. Walker's hair?