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Earth Revealed: Minerals Name _______________________________ Score ______/20 points 1. True or False For the most part, minerals are not used in the formation other things. 2. Iron ore is mined from the Earth and used to make ____________________ . 3. Quartz is used to make ____________________ . 4. Minerals are also useful tools for classifying ____________________. 5. True or False By studying minerals, geologists can tell how the tectonic plates have moved over time. 6. True or False New minerals are still being discovered today. 7. There are about ___________ common minerals. 8. _____________________ growth occurs atom by atom in exactly the same pattern repeated over and over again. 9. _____________________ is a mineral that forms when sodium and chlorine atoms combine. 10. True or False Chlorine is a poisonous gas. 11. True or False Quartz is harder than steel. 12. True or False All minerals can be identified by its physical properties. 13. True or False Rocks containing minerals are studied by cutting them into thin slices and also by melting them to study them under a microscope. 14. Diamonds and graphite are both made of the same substance - _____________________ 15. ____________________ is commonly used in pencils. 16. True or False Pure metals are quite rare. 17. ____________________ can form underground when water is heated by ___________________. 18. True or False Minerals form in just two ways – evaporation and sublimation. 19. Pure silicon is used in what important form of technology? ____________________ 20. The people who study minerals do so in order to learn about ______________________________________________________________________________________.