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Inside Earth Chapter 5 Review Rocks Section 1 Classifying Rocks • What doe geologists observe when studying rocks? • Texture • Grains • Grain size • Shape • Pattern • No visible grain Section 1 Continued • What is used to see the mineral composition of rock? • The 3 major groups of rock: • Igneous • Sedimentary • metamorphic Section 2 Igneous Rocks • Characteristics of igneous rock • Uses • Why is this type used in building? • Classifications • Origin • Extrusive • intrusive • Texture • Porphyritic texture • How these form • Mineral composition Section 3 Sedimentary Rocks • Sediment • Erosion • Deposition • What process changes sediment to sed rock? • Fossils? • Compaction • cementation Types of Sedimentary Rock • Clastic • Shale • Sandstone • Conglomerate & breccia • Organic • Coal • limestone • Chemical • Chemical rock Section 4 Rocks From Reefs • Living coral • Coral reef • Forms in what conditions • How coral reef forms • Forms only in what conditions? • Process? • Limestone deposits from coral reefs • Absorbs what element? Atolls Section 5 Metamorphic Rocks • How metamorphic rock forms • How they are classified • Foliated Section 6 The Rock Cycle • Rock cycle • Forces in the cycle • The rock cycle & plate techtonics • Subducting oceanic plates • Colliding continental plates