The correct answer is 1 and 3 only. Key Points - A tectonic plate is a massive, irregularly shaped slab of solid rock, generally composed of both continental and oceanic lithosphere. - They are also called lithospheric plates. - Depending on the occupied area of the plate, it is classified as an oceanic plate or continental plate. - If a large portion of the plate occupies the ocean it is called an Oceanic plate. - If a large portion of the plate occupies the continent it is called a continental plate. - Tectonic plate activity is one of the most common causes of Earthquakes. - Iceland's tectonic plates are the reason for so much geothermal and volcanic activity. - Volcanos around the world are one of the major tourist destinations.