### motion | wave:

Acoustic wave
* Some acoustic waves result from extreme heat
* have all wave properties.

Big wave
* can start with small splashes.
* have greater velocities Big waves can outrun small waves.
* travel faster than small waves in the same medium.

### motion | wave | blast wave:

Sonic boom
* are shock waves.
* blast wave
* created by supersonic flight can be loud enough to shatter windows or rattle structures.
* generate enormous amounts of sound energy, sounding much like an explosion.
* is an impulsive noise similar to thunder.
* occur when an object is travelling at the speed of sound.

Body wave
* are of two types, compressional and shear
  - seismic waves that travel through the lithosphere
  - transmitted through the earth, surface waves occur only on the surface of the ground
* can also help disguise thinning hair.
* propagate through earth, while surface waves travel along the ground surface.
* travel faster in rocks of greater elasticity.
* travel through the body or interior of the earth
  - depths of the Earth

Cold wave
* are waves.
* can cause death and injury for animals , people and livestock.
* occur when arctic air, originating in the Yukon Territory, moves southward.
  * can cause death and injury for animals, people and livestock. Extreme winter cold causes freezing of water pipelines if they are poorly insulated. Motor vehicles often fail if the motor oil gels or the antifreeze fails.

Compression wave
* are the fastest waves produced from an earthquake.
* travel faster and arrive at the surface first.

Compressional wave
* can travel through anything.
* carry sound energy and require a medium through which to travel.

Density wave
* propagate outwards.
* trigger star formation.

Different wave
* affect the human body.
* shapes cause different hallucinations.

Earthquake wave
* Some earthquake waves move only along the surface of the earth.
* allow seismologists to construct models of the earth's interior.
* are like sound waves.
* compress the soil, as well as move it side to side and up and down.
* move rapidly through solid ground.
* reach the epicenter first.
* travel faster under continents.

Faster wave
* are indicative of being calm, alert, focused and thinking intensely.
* cover more distance in the same period of time.

Giant wave
* Most giant waves are caused by earthquakes.
* Some giant waves are caused by hurricanes.

### motion | wave:

Gravitational wave
* are disturbances in the curvature of space-time caused by the motions of matter
  - extremely weak
  - literally distortions in space-time, ripples in the fabric of the universe
  - quadrupolar in nature
* are ripples in the curvature of spacetime
  - fabric of space-time
  - tiny deformities in space, that spread at the speed of light
  - waves of tidal force
* carry gravitational energy away from a system.
* have a solid theoretical basis, founded upon the theory of relativity
  - energy, and therefore they have mass
* interact only weakly with matter.
* introduce tensor fluctuations in the metric.
+ Gravity, General relativity, Gravitational waves: Force :: Basic physics ideas
  * Gravitational waves are ripples in the curvature of spacetime. They move as a wave, travelling outward from the source. Einstein predicted them in 1915 on the basis of his theory of general relativity. In theory, gravitational waves transport energy as gravitational radiation. Sources of detectable gravitational waves might include binary star systems composed of white dwarfs, neutron stars, or black holes. In general relativity, gravitational waves cannot travel faster than the speed of light.