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Thursday 19 March 2020

Chapter 3 Lesson 2: Types of Rocks 4th Grade Science. - ppt download

Chapter 3 Lesson 2: Types of Rocks 4th Grade Science. - ppt download: Igneous Rocks Igneous Rocks Formed from melted rock (magma) If they cool slowly (millions of years) they have large grains of minerals. Granite Obsidian

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