# data[].attributes.headline
frequency-hertz. (Abbreviation: Hz) SI unit of wave frequency, where 1 hertz equals 1 wave passing a fixed point per second. Examples:"A" note on a violin string vibrates at about 440 Hz. Picture:

# data[].attributes.subject
frequency-hertz. (Abbreviation: Hz) SI unit of wave frequency, where 1 hertz equals 1 wave passing a fixed point per second. Examples:"A" note on a violin string vibrates at about 440 Hz. Picture:

# data[].attributes.headline
Amplitude-The amplitude of a wave is a measure of the displacement of the wave from its rest position. Examples:radio wave moves back and forth ,the length and width of waves, such as sound waves. Picture:

# data[].attributes.subject
Amplitude-The amplitude of a wave is a measure of the displacement of the wave from its rest position. Examples:radio wave moves back and forth ,the length and width of waves, such as sound waves. Picture:

# data[].attributes.headline
compression-a longitudinal wave propagated by the elastic compression of the medium. Examples: mechanical longitudinal wave, or a compressional wave, is a sound wave. Picture:

# data[].attributes.subject
compression-a longitudinal wave propagated by the elastic compression of the medium. Examples: mechanical longitudinal wave, or a compressional wave, is a sound wave. Picture:

# data[].attributes.body
Rarefaction- diminution in the density of something, especially air or a gas. Examples: a phase in a sound wave or phonon. Picture:

# data[].attributes.body
Trough-The lowest point on a wave. Examples:the bottom of a stick. Picture:

# data[].attributes.body
Crest-The highest point on the wave. Examples:the comb on a rooster's head, Mount Lyell in Yosemite, feathers in the top of a medieval helmet. Picture:

# data[].attributes.body
Transverse Waves-a wave vibrating at right angles to the direction of its propagation.Examples: light, a wiggling string, ocean waves, and ripples from a stone thrown into a pond. Picture:

# data[].attributes.body
Medium- A substance that makes possible the transfer of energy from one location to another, especially through waves. Examples: air, water, solids, gases. picture:

# data[].attributes.body
longitudinal wave- A wave vibrating in the direction of propagation. Examples: sound waves, slinky waves, Earthquake P wave, Tsunami waves, Glass vibrations, Internal water waves, Ultra sound, Spring oscillations picture:

# data[].attributes.body
wave- A wave is a disturbance that transfers energy through matter or space.  Examples: sound waves, Slinky waves, water waves, stadium waves, and jump rope waves picture: