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Understanding Rocks: Types, Formation, and Classification

This chapter explores the three main classes of rocks: igneous, metamorphic, and sedimentary. Learn how cooling, hardening, weathering, and erosion transform rocks into sediments and metamorphic rocks. Discover the unique properties of igneous rocks, including their formation from magma and the role of minerals like mica and feldspar. Understand the rock cycle and the processes that classify rocks. Key concepts include the definition of sedimentary rocks, the importance of heat and pressure in rock transformation, and the characteristics of different rock types.

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Understanding Rocks: Types, Formation, and Classification

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  1. Chapter 3 - Rocks Test Wednesday

  2. Which of following is not one of the three classes of rocks? • Igneous • Metamorphic • Magma

  3. What two processes change rock into sediments? • Cooling & Hardening • Heat & Pressure • Weathering & Erosion

  4. What two things can change sedimentary and igneous rocks into metamorphic rocks? • Cooling & Hardening • Heat & Pressure • Weathering & Erosion

  5. What is the only kind of rock that can form directly from magma? • Igneous • Metamorphic • Sedimentary

  6. All rocks are made up of • Lava • Sediments • Magma • Minerals

  7. The grouping of things that are alike is the science of • Petrology • Classification • Geology • Biology

  8. Rocks formed when melted minerals cool and harden are classified as • Molten rocks • Sedimentary rocks • Igneous Rocks • Lava Rocks

  9. Magma that reaches Earth’s surface is called • Lava • Molten • Igneous • Conglomerate

  10. Molten rock is made up of • Melted minerals • Lava • Obsidian • Iron and Nickel

  11. The mineral crystals of a rock formed from magma usually are • Small • Large • Fine • Cubic

  12. Rocks formed from the remains of living things are classified as • Metamorphic • Igneous • Sedimentary • Lava

  13. Limestone and halite are examples of • Clastics • Nonclastics • Foliated • Nonfoliated

  14. A rock formed when another rock is changed by heat and pressure is classified as • Metamorphic • Igneous • Sediment • Clastic

  15. The series of natural processes by which rocks are slowly changed from one type to another is • Sedimentation • The Rock Cycle • Classification • Petrology

  16. A metamorphic rock that has mineral crystals arranged in bands is • Unfoliated • Foliated • Clastic • Nonclastic

  17. The texture of an igneous rock that does NOT have mineral crystals is • Fine • Clastic • Glassy • Foliated

  18. Quartzite is formed from • Halite • Sandstone • Shale • Pyrite

  19. Coal is a sedimentary rock formed from • Lava • Plants • Chemicals • Magma

  20. Two minerals commonly found in igneous rocks are mica and • Halite • Feldspar • Pyrite • Silver

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