Earthquake, A sudden shaking of the ground caused by movement along a fault., Fault, A crack or fracture in the Earth’s crust where movement has occurred; can be visible or underground., Stress, The force that acts on rocks causing them to move or break., Tensional, The type of stress that pulls rocks apart., Compressional, The type of stress that pushes rocks together., Shear, The type of stress that causes rocks to slide past each other., Normal Fault, A fault where the land moves downward due to pulling forces., Reverse Fault, A fault where the land moves upward because of pushing forces., Strike-slip Fault, A fault where rocks move sideways without moving up or down., Oblique, A fault that shows both vertical and sideways movement., Active, A fault that has moved recently and can still cause earthquakes., Inactive, A fault that has not moved for a long time but may still move again, Fault Line, Visible trace of a fault on the Earth’s surface., Fault Scrap, Steep slope formed by vertical fault movement., Foot wall, The block of rock that lies below an inclined fault plane., Hanging wall, The block of rock that lies above an inclined fault plane., Fault Plane, The surface along which rocks break and slide during movement., Fault Zone, Area around a fault plane with multiple fractures; weaker rock., Right Lateral Fault, Opposite block moves right., Left Lateral Fault, Opposite block moves left.

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