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Download Science 8--Chapter 13-Lesson 2 HD Notes
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Science 8 Chapter 13--Lesson 2 HD Notes Name _______________ 16-17 Classifying Rocks Igneous rocks igneous rock—rock formed from magma or lava when it cools granite-- basalt-- obsidian-- pumice— The texture of igneous rocks depends on the rate at which the molten rock cooled. Grains found in rocks may also be called crystals. 1 Science 8 Chapter 13--Lesson 2 HD Notes Name _______________ 16-17 Most abundant rocks on Earth Internal thermal energy is the energy source for producing magma. Pumice is an abrasive igneous rock used in cleaning materials. -------------------------------------------------------------------------------------------Sedimentary Rocks sedimentary rock—rock that forms when sediments become pressed or cemented together or when sediments fall out of solution sandstone-- shale-- limestone-- Sediment grains are removed by a process called erosion and build up in layers. Low areas are called basins. 2 Science 8 Chapter 13--Lesson 2 HD Notes Name _______________ 16-17 The grains in sedimentary rock are often rounded during erosion. Limestone is the rock found in our pastures. Sediment organic matter minerals rock fragments Cementation is the last step in the formation of sedimentary rock. Most fossils are found in sedimentary rocks. weathering—the breakdown of rocks into smaller particles by natural processes erosion—the natural process that moves sediments from place to place Metamorphic Rocks Metamorphic rock—rocks that have changed due to temperature and pressure increases Metamorphic rocks form when existing rocks are heated and minerals recrystallize. metamorphism—the process that turns parent rocks into metamorphic rocks 3 Science 8 Chapter 13--Lesson 2 HD Notes Name _______________ 16-17 One type of rock is changed into another type Identify the metamorphic rocks as foliated or nonfoliated. Identify the parent rock. gneiss-- marble— slate— 1. Loose grains of rock material are called ________________. 4 Science 8 Name _______________ Chapter 13--Lesson 2 HD Notes 16-17 2. Which list shows the correct sequence? A. shale, foliation, basalt B. gneiss, lithification, shale C. granite, metamorphism, gneiss D. sandstone, lithification, sediment 3. The boxes on the left describe different ways that rocks form. Write the type of rock that forms in each box on the right. Parent rocks are squeezed, heated, or exposed to hot fluids. Rock and mineral fragments are deposited in basins, compacted, and cemented by dissolved minerals Magma or lava cools and crystallizes. End!—Sunday, July 10, 2016 5 type of rock; type of rock: Type of rock:
