ACTIVITY 1: Classifying Rocks Direction: Fill in the table then answer the questions that follow. Describe how it is formed Rock Type of Rock (Metamorphic/ Igneous/ Sedimentary) Characteristics Gneiss Obsidian Basalt Limestone Marble Conglomerate Guide Questions: 1. In terms of characteristics and mode of formation, what are the similarities among igneous rocks? Sedimentary rocks? Metamorphic rocks? 2. How can you explain the variety of rocks around us? 3. Which type of rock is the most common in your community? Why?​