earth's+crust+word+wall

=__earthguake : Tectonic earthquakes occur anywhere in the earth where there is sufficient stored elastic strain energy to drive fracture propagation along. __= =__ volcano: transitoriness or composite volcanoes are tall conical mountains composed of lava flows and other ejecta in alternate layers, the that give rise to the name. __=


 * __Ring of fire : The Pacific Ring of Fire (or sometimes just the Ring of Fire) is an area where large numbers of __[|earthquakes] __and [|volcanic] eruptions occur in the basin of the [|Pacific Ocean] .__**


 * __ seismology: is the scientific study of [|earthquakes] . __**


 * __surface waves: Lower [|frequencies], especially [|AM] [|broadcasts] in the [|mediumwave] (sometimes called "medium frequency") and [|long wave] [|bands] (and other types of radio frequencies below that), travel efficiently as a surface wave. __**

**__liquefaction:__** **__ In [|physics], to liquefy (sometimes spelled liquify) means to turn something into the [|liquid] state. __** __** The velocity of P-waves in a [|homogeneous] [|isotropic] medium is given by **__ __**where //K// is the [|bulk modulus] (the modulus of incompressibility), //μ // is the [|shear modulus] (modulus of rigidity, sometimes denoted as //G// and also called the second[|Lamé parameter] ), //ρ // is the <span style="background-clip: initial; background-image: none; background-origin: initial; color: #0645ad; text-decoration: none;">[|density] of the material through which the wave propagates, and //<span class="texhtml" style="font-family: 'Times New Roman',serif; font-size: 15px; line-height: 1em; white-space: nowrap;">λ // is the first <span style="background-clip: initial; background-image: none; background-origin: initial; color: #0645ad; text-decoration: none;">[|Lamé parameter] .**__


 * __ //aftershock: This article is about the geological event. For other uses of the term, see <span style="background-clip: initial; background-image: none; background-origin: initial; color: #0645ad; text-decoration: none;">[|Aftershock (disambiguation)] .// __ **

.1 Sign in to your wikispace (link on the left menu). Add the following words to your word wall and define them. Please use the [|volcanoes online glossary link]or use the above powerpoint presentation to help with definitions. _start here volcano vents erupts dormant active cinder cone/shield/stratovolcano (see your volcano chart for more information: you don't need to define these here though you do need to know them!) pryoclastic flow cinder pumice vulcanologist viscosity :R**//ing of Fire://**The belt of volcano that surround the Pacific Ocean. This belt contains about two-thirds of the world's [volcano|active] volcanoes. _end here