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Monday– September DAILY AGENDA • Start of Class Routine • Review Bellwork • Review Matter & Metrics Test • Review Reading Notes • Types of Rocks Guided Notes th 26 REQUIRED MATERIALS • Science Binder • Pencil/Eraser • Rock Cycle Reading Notes (from Friday) Bellwork Review • The structure of rocks is _________ different from the structure of minerals. • What is an example of a rock composed of minerals? An example of a rock composed of minerals would be limestone. • What are two examples of rocks that contain no minerals? Two examples of rocks that contain no minerals would be obsidian and coal. • What is the definition of the rock cycle? The rock cycle is defined as a set of natural processes that form, change, break down and reform rocks. Igneous Rock • Forms when molten rock (magma/lava) cools and hardens • Intrusive – Cools slowly beneath Earth’s surface – Usually have large, visible grains • Extrusive – Cools rapidly on Earth’s surface – Usually have small to no visible grains • Color is based on the amount of silica in the magma How Igneous Rocks are Formed Types of Igneous Rocks Intrusive Igneous Rocks Extrusive Igneous Rocks Sedimentary Rocks • Forms from the compaction and cementation of rock pieces, mineral grains, or organic matter called sediments • Can contain fossils • Sediments are formed through the process of weathering and erosion of exposed rocks. • Strata are layers of rock, or sometimes soil Kinds of Sedimentary Rocks • Clastic = made of mineral or rock pieces (shale; conglomerate; sandstone; Breccia) • Organic = made from plant or animal remains (coal; coquina; some limestones) • Chemical = made from dissolved minerals in water (halite; other limestones) How Sedimentary Rocks are Formed Sedimentary Rocks Metamorphic Rock • Forms when rocks are changed into different kinds of rocks by great heat and pressure • They are heated, squeezed, folded, or changed by contact with hot magma. • 2 kinds: – Foliated = grains are in bands – Non-foliated = no banding How Metamorphic Rocks are Formed Metamorphic Rock
