Chapter 4 lesson 2 igneous rocks. This document summarizes key concepts about igneous rocks and magma from Chapter 4 of Essentials of Geology 3rd Edition. Igneous rocks are also classified based on texture, from glassy (no crystals) to fine-grained (small crystals) to coarse-grained (large crystals) and porphyritic (large crystals within a fine-grained matrix). Start studying CHAPTER 4 Rocks - Lesson 2 "Igneous Rocks" 8th grade science. Study with Quizlet and memorize flashcards containing terms like igneous rock, extrusive rock, volcanic glass (obsidian) and more. Study with Quizlet and memorize flashcards containing terms like What happens when lava cools and crystallizes?, Extrusive rock, Extrusive Igneous Rock and more. Dive into the fascinating world of igneous rocks with these flashcards from Chapter 4, Lesson 2. Find other quizzes for Science and more on Quizizz for free! What can we conclude about the depth where this rock formed? The material explores the formation, composition, and crystallization of igneous rocks, providing insights into geological processes. Magma forms from the partial melting of rocks in the crust and upper mantle due to processes like pressure release, volatile addition, and heat transfer. , Lava cools ________above Study with Quizlet and memorize flashcards containing terms like Extrusive Rock, Intrusive rock, Volcanic glass and more. , What is a grain? and more. wjlac ob scl4i 7jw 2nw03yd 7pzlz jf5 fjwj pwlptxx v7aolnvw3