Earth Science Guided Reading and Study Workbook 47 IPLS Chapter 5 Weathering, Soil, and Mass Movements Summary 5.1 Weathering Mechanical weathering occurs when physical forces break rock into smaller and smaller pieces without changing the rock’s mineral composition. In nature, three physical processes are especially important causes of Section 18.2 Cloud Formation. Earth Science Guided Reading and Study Workbook . 135. Topic. Main idea. 27 CK-12 Earth Science for Middle School Workbook Answers. 364. Chapter 9: Weathering and Formation of Soil .. … eruption may form a mushroom cloud, like the cloud formed by a nuclear explosion.. … Lesson 18.2: Critical Reading. Chapter 18.
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