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Wave- a disturbance that transfers energy from place to place.
Caption: Picture of a sound wave.
Amplitude- The maximum distance the particles of a medium move away from their rest positions as a wave passes through the medium.
Wavelength- The distance between the crest of one wave and the crest of the next.
Caption: In this picture, the waves are moving away from each other.
Frequency- The number of complete waves that pass a given point in a certain amount of time.
Medium- material through which a wave travels.
Caption: This is fire and water. Both are mediums. The other medium is a solid.
Mechanical Wave- a wave that requires a medium through which to travel.
Caption: This sign is metal. Metal is solid, and solid is a medium. A mechanical wave needs a medium to pass through.
Vibration- a repeated back-and-forth or up-and-down motion.
Caption: This is a drum. Striking a drum will cause it to vibrate, making a sound.
Transverse Wave- A wave that moves the medium in a direction perpendicular to the direction in which the wave travels.
Caption: This is a picture of something perpendicular. As the definition says, a transverse wave moves the medium in a direction perpendicular to the direction in which the wave travels.
Crest- The highest part of a transverse wave.
Trough- The lowest part of a transverse wave.
Longitudinal Wave- A wave that moves the medium parallel to the direction in which the wave travels.
Compression- The part of a longitudinal wave where the particles of the medium are close together.
Rarefaction- The part of a longitudinal wave where the particles of the medium are far apart.
Surface Wave- A wave that occurs at the surface between two mediums.
Caption: This is a wave on the surface of the water.
Hertz (Hz)- Unit of measurement for frequency.
Caption: This is a cart with measures of frequency, or Hertz.