2. Chapter: Rocks and Minerals Table of Contents Section 3: Metamorphic Rocks and the Rock Cycle Section 1: Minerals—Earth’s Jewels Section 2: Igneous and Sedimentary Rocks
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30. Section Check 1 Question 1 What does inorganic mean? Answer Inorganic means not formed by plants or animals. NC: 3.04
31. Section Check 1 Question 2 List some places you might find minerals in your home. Answer You can find minerals in salt shakers, pencils, glasses, and ceramic dishes. NC: 3.04
32. Section Check 1 Question 3 Explain the difference between a rock and a gem. Answer Gems are rare minerals that can be cut and polished. They have a beautiful color and lack cracks or blemishes. Rocks are often cloudy and when they are cut, they crack. NC: 3.04
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57. Section Check 2 Question 1 What type of rock forms when melted rock material from inside Earth cools? A. igneous B. lava C. ore D. sedimentary NC: 3.04
58. Section Check 2 Answer The correct answer is A. Igneous rock forms when melted rock, called magma, cools. NC: 3.04
59. Section Check 2 Question 2 What determines the color of igneous rock? Answer The chemicals in the melted rock determine the color of igneous rock. NC: 3.04
60. Section Check 2 Question 3 The photo shows _______ rock. A. igneous B. metamorphic C. sedimentary D. volcanic NC: 3.04
61. Section Check 2 Answer The answer is C. Sedimentary rocks are formed by layers of different sediments over time. NC: 3.04
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71. Section Check 3 Question 1 What type of rock results when an existing rock changes form? A. igneous rock B. metamorphic rock C. a mineral D. sedimentary rock NC: 3.04
72. Section Check 3 Answer The answer is B. A metamorphic rock is formed when an existing rock is heated by Earth’s temperature or squeezed by intense pressure. NC: 3.04
73. Section Check 3 Question 2 Compare and contrast the two groups of metamorphic rocks. Answer Foliated rocks have many layers. Nonfoliated rocks do not have layers and the individual mineral grains can be difficult to see. NC: 3.04
74. Section Check 3 Question 3 Would you expect to find a well-preserved artifact in a metamorphic rock such as quartzite? Explain. NC: 3.04
75. Section Check 3 Answer No; quartzite is an example of a nonfoliated metamorphic rock. These rocks do not have distinct layers. Quartzite forms when quartz sand grains recrystallize during intense heating and pressure. An artifact would get destroyed during this process. NC: 3.04
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