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Name Class Date 13.1 Minerals and Rocks What Are Minerals? For Questions 1–5, write True if the statement is true. If the statement is false, replace the underline word or words to make it true. Write your changes on the line. 1. Geologists have so far identified about 1000 minerals. 2. Minerals are formed from inorganic materials. 3. Each type of mineral has a unique crystal structure. 4. Most minerals are compounds composed of one element(s). 5. List the five criteria a material must meet to be considered a mineral. 6. Describe the proportion of elements in minerals that contain more than one element. 7. Name a mineral that is made of only one element. Mineral Formation 8. Fill in the table with a description of the ways that minerals can form. Ways That Minerals Can Form Crystallization from magma or lava Precipitation Pressure and temperature Description Produced by organisms 9. What factor affects the size of the crystals in minerals that form from magma or lava? Explain your answer. 10. What is a vein, and how does it form? 11. Name an example of a mineral formed by an organism. Rocks For Questions 12–14, circle the letter of the correct answer. 12. Rock that forms as magma cools slowly and solidifies below Earth’s surface is called A. intrusive igneous rock. B. extrusive igneous rock. C. clastic sedimentary rock. D. chemical sedimentary rock. 13. Which of the following is NOT a factor in the formation of metamorphic rock? A. deposition C. recrystallization B. high pressure D. high temperature 14. An example of metamorphic rock is A. shale. C. marble. B. basalt. D. limestone. 15. What causes rocks to move, and how does that movement relate to the rock cycle? 16. Describe how sedimentary rocks are formed.