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__Vocabulary__

 * Earthquake:**An earthquake is the shaking and trembling that results from the movement of rock beneath earth's surface.
 * stress**:a force that acts on rock to change it's shape or volume.
 * Shearing:** Stress that pushes a mass of rock in two opposite directions is called shearing.
 * tension:**tension pulls on the crust stretching rock so that it becomes thinner in then middle.
 * compresion:** squeses rock until it folds and breaks.
 * deformation:**most changes in the crust occur so slow the cannot be directly observed.
 * fault:** a fault is a gash in earths crust where bunches of rock that slide past each other.
 * strike -slip fault**: the rock on the either side of the fault slip by each other moving side-ways or up and down.
 * normal fault:** the fault is on an angle so that one piece of rock lies above the fault and the other is below the fault.
 * Reverse fault:** a reverse fault has the same structure as a normal fault but the chunks move in opposite directions.
 * Hanging wall:** a hanging wall is the part of the fault that lies on the top.
 * Foot wall:** the part of the fault that lies on the bottom.
 * fault-block mountain:** when a normal fault up lifts a block of rock.
 * Folds:** parts of rock that are formed by compresion.
 * Anticline:** a fold in a rock that is bent upward.
 * Syncline:** a folded rock that is bent downward.
 * Plateau:** a big piece of flat land that is elevated above sea level.

__**Outline Stress in the crust: earthquake Types of stress shearing tension compresion deformation Kinds of faults**__