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    • 1. The second most common element in the earth's crust; main constituent of quartz.
    • 6. Type of acid used in the lab to test for the presence of sulfide and carbonate minerals.
    • 9. Aquatic creature that lives inside a hinged shell made of calcium carbonate ("seashell").
    • 11. Element most common in the deep interior of the earth.
    • 13. The color of a powdered mineral.
    • 14. The most brilliant grade of non-metallic luster (for example, the luster of olivine).
    • 15. Type of irregular breakage in a mineral, indicating rather strong chemical bonds between the atoms. 
    • 16. Chemical compound that is detected by the odor or rotten eggs when in contact with acid.
    • 19. A fundamental substance which cannot be further subdivided without destroying its identity.
    • 21. A mixture of elements in which the relative proportions are consistently discrete.
    • 24. Metallic element with a relatively high density. 
    • 25. Major element of the mineral which makes up most limestones. 
    • 27. Chemical symbol for this element is "Na." 
    • 29. Most of the outer planets in the solar system are composed mostly of - - -. 
    • 31. Minerals which are common members of the layer silicates, characterized by basal cleavage.
    • 33. The major element which forms the base of organic compounds (can also form inorganic compounds). 
    • 34. Common radioactive element which contributes to the earth's interior heat. 
    • 35. A unit of an ordered solid, whose atoms are arranged in a repeating pattern.

    • 2. Compounds commonly identified by the release of carbon dioxide when acid is added.
    • 3. A type of luster which resembles that of broken glass.
    • 4. A measurement scale describing the resistance of minerals to being scratched. 
    • 5. A naturally occurring aggregate or mixture of one or more minerals.
    • 7. The presence of smooth, flat surfaces produced by breaking a mineral (indicates weak bonding).
    • 8. Type of luster which is never seen in transparent nor in translucent minerals. 
    • 10. Element which is found in mafic minerals. 
    • 12. Basal (1-directional) cleavage, typically shown by ---- sheets of minerals. 
    • 17. Earth's major source of external heat.
    • 18. The most common metallic element in the earth's crust. 
    • 20. Description for the inner planets of the solar system (Mercury, Venus, Earth, and Mars). 
    • 22. Earth's most common element (most of it is not present as a gas, but as chemical compounds). 
    • 23. Chemical symbol for this element is "K." 
    • 26. The most common mineral form of silica. 
    • 28. Type of chemical compound of which rust is a member. 
    • 30. An atom which has acquired an electrical charge by losing or gaining one or more electrons.
    • 32. Very fine-grained layer silicate; common constituent of "mud."

    Copyright © 1989 by William K. Tong