Richard

RICHARDS PAGE Earthquakes come from the ground where a tectonic plate is either subduced (pushed under) another plate or breaks in half. When this happens a lot of energy is relased shaking the ground. Volcanos come from cracks in the earth. Underneath the crust, liguid rock (called magma) is stored in a magma chamber. when there is enough heat and pressure the top of the volcano blows off and magma is released. Once the magma is out of the volcano it is called lava.

so what comes from earth

Read more: [] Plates at our planet’s surface move because of the intense heat in the Earth’s [|core] that causes molten rock in the [|mantle layer] to move. It moves in a pattern called a convection cell that forms when warm material rises, cools, and eventually sink down. As the cooled material sinks down, it is warmed and rises again. Scientists once thought that [|Earth’s plates] just surfed on top of the mantle’s giant convection cells, but now scientists believe that plates help themselves move instead of just surfing along. Just like convection cells, plates have warmer, thinner parts that are more likely to rise, and colder, denser parts that are more likely to sink. New parts of a plate rise because they are warm and the plate is thin. As hot magma rises to the surface at [|spreading ridges] and forms new [|crust], the new crust pushes the rest of a plate out of its way. This is called ridge push. Old parts of a plate are likely to sink down into the mantle at [|subduction zones] because they are colder and thicker than the warm mantle material underneath them. This is called slab pull. [|Richard sub.wmv]media type="custom" key="9349056" align="right"media type="custom" key="9379112"PR []
 * # || BooksRead || Book Review ||
 * 1 || Diary of a Whimpy Kid || there is this boy that is in a school and he thinks everyone in the school was morons. ||
 * 2 || DOAWK Rodrik Rules ||  ||
 * 3 || DOAWK Last Straw ||  ||
 * 4 || DOAWK Dog Days ||  ||

ESS ON THIS DOCUMENT AND THIS VOKI !!!!!