Activity No.2 Fill in the blank with the correct word/s.. 1. A surface is extremely hot liquid and semi-liquid rock located under Earth's 2. A is a molten emerging as a liquid onto Earth's surface. 3. Volcanic volcanic vent. happen when lava and gas are discharged from a 4. Plate is the theory that Earth's outer shell is divided into several plates that glide over Earth's mantle 5. A is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.