### motion | wave:

Surf
* causes beach erosion
* causes severe beach erosion

### motion | wave:

Surface wave
* are both transverse waves and longitudinal waves mixed in onemedium
  - easy to see on seismograms as they have large amplitudes
  - elastic waves whose energy is confined close to the surface of the earth
  - larger in amplitude and longer in duration than body waves
  - long, slow waves
  - neither longitudinal nor transverse
  - slower than body waves
  - the primary source of energy in the beach environment
* cause the most devastating damage to buildings, bridges, and highways.
* occur on the outer layer of the crust and body waves occur deeper.
* stem from body waves that reach the surface.
* travel along the earth's surface and are the most destructive
  - surface and are the slowest wave
  - around curved corners, and they reflect at sharp edges
  - at or near the Earth's surface
* travel at the surface of a material and move in elliptical orbits
  - material with the particles move in elliptical orbits
  - on the earth's surface, and more slowly than any of the other waves
  - only on the surface like waves on the surface of water

Swell
* are just water displacements on the surface of the ocean usually caused by storms
  - rhythmic action of the water and result mainly from tides, storms and earthquakes
  - waves that have outrun the wind and are characterized by more uniformity and consistency
* can travel hundreds of miles.
* cause swells.

### motion | wave | swell:

Ocean swell
* are a crucial guide in sailing.
* build all around.
* is originated by storms far out from land.

South swell
* impacts the southern coast during the northern hemisphere summer.
* tend to have less energy and longer wave periods than winter swells.

Tsunami wave
* are shallow-water waves with long periods and wave lengths.
* can be powerful enough to tear the foundations from houses
  - continue for hours
  - sweep away loose objects

Ultrasonic wave
* are longitudinal waves with frequencies above the audible range
  - sound waves with frequencies above the limits of human audibility
* can dissolve fats.
* detect heart action and obtain the baby's heart rate.
* have many uses.
* travel in a straight line, just like audible sounds.

Ultrasound wave
* are very effective when it comes to penetration of tissues.
* have a wavelength of several millimeters.

### motion | wave:

Water wave
* are fundamentally different from sound waves, for example
  - variations in the height of a body of water
* carry energy through water.
* form when the wind exerts a shearing stress on the sea surface
  - forces shearing stress on the oceans' surface
* have the ability to travel around corners, around obstacles and through openings.
* lose energy into bottom sediments when the water is relatively shallow.
* travel fastest when the medium is the deepest
  - in a circle away from the source of disturbance

Waveform
* are quartz crystal-controlled for precise frequency output
  - the wiggle in a seismogram that represents ground motion
  - true size and never sized
* can be a seeming infinite number of sizes and periods called wavelengths
  - have multiple channels
* refers to the shape of the wave and measures tone quality.