1 Inflammation of the gingiva, bone loss, and increased gingival recession may progress slower than with other forms of periodontitis.  Periodontitis Associated with Systemic Diseases - Systemic diseases, such as heart disease, diabetes, and certain forms of arthritis, may have a correlation with periodontitis.
Main Content. An earthquake is ground shaking caused by a sudden movement of rock in the earthâs crust. Such movements occur along faults, which are thin zones of crushed rock separating blocks of crust.
Earthquakes Date Class 0 LESSON 1 A. B. What are earthquakes? are the vibrations in the ground that result from movement along breaks in Earth's lithosphere. 2. The forces that move breaks in the lithosphere. Where do earthquakes occur? 1. Most earthquakes occur along active also push and pull rocks along . These areas are plate boundaries, boundaries, generally in the middle of oceans or along the edges of a. Deep earthquakes occur along where a denser oceanic plate subducts into the mantle. b.