Earthquakes and Volcanoes Study Guide Know the meaning of the following vocabulary terms from the unit. Earthquake Volcano Magma Lava Landslide Understand the cause and reason for each of the following: The structure and the layers that make up Earth Tectonic plates and how they move and create landforms The causes and effects of an earthquake How volcanoes are formed How volcanoes help to form new land Causes of landslides Events that cause Earth’s surface to change quickly and what Earth would look like