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Study Island Copyright © 2014 Edmentum - All rights reserved. Generation Date: 12/09/2014 Generated By: Cheryl Shelton Title: Grade 6 Blizzard Bag 2014-2015 Science -Day 4 1. "Water seeps into rock cracks and dissolves minerals there. The solution travels through cracks in the rocks, eventually concentrating into large crystals." The process above is a description of _______. A. mineral rock formation B. mineral crystal formation C. mineral metamorphosis D. mineral crystal mining 2. Tim is given a rock sample by his teacher. He is also given the rock identification table below and told that his rock is either quartzite, granite, limestone, or gneiss. Rock Type Texture Quartzite nonfoliated Mineral Composition Grain Size quartz medium Granite interlocking feldspar and quartz coarse Limestone clastic calcite or dolomite fine Gneiss foliated feldspar and quartz coarse If Tim determines that his rock's composition is pure quartz, which rock does he have? A. limestone B. quartzite C. gneiss D. granite 3. A science teacher who was teaching a unit on minerals modeled mineral formation for the class. She heated granular sugar and a very small amount of water in a pan until the sugar melted and boiled. After a few minutes, she poured the mixture out into a pan, and the mixture took the shape of the pan and hardened. As it hardened, the sugar molecules in the mixture formed crystals. Minerals that might form in the igneous environment the teacher modeled include A. calcite and epidote. B. magnetite and quartz. C. gypsum and feldspar. D. halite and feldspar. Hardness Shape Crystal System Color Luster Streak Cleavage Fracture Specific Gravity Graphite [C] 1 lamellar veins to earthy masses hexagonal steel gray metallic black Yes Yes-flaky 2.2 Talc [Mg3Si4O10(OH)2] 1 Yes-basal Yesuneven 2.7-2.8 Gypsum [CaSO4· 2H2O] 2 tabular, bladed or blocky white to nonmonoclinic colorless white metallic to gray Yes Yesuneven 2.3 Gold [Au] 2.5 nuggets, grains golden golden metallic yellow yellow No Yes-jagged 19.3 golden greenish metallic yellow black No Yesconchoidal 5.1 colorless to pale yellows, nonYesYesisometric white browns metallic octahedron conchoidal and grays 3.5 Mineral Pyrite [FeS2] Diamond [C] 6 10 flattened or white to nonmonoclinic white tabular green metallic isometric cube, octahedron isometric and pyritohedron cube and octahedron 4. Of the minerals on the decision chart above, which two can be white in color? A. graphite and talc B. diamond and graphite C. talc and gypsum D. pyrite and gold Mineral Hardness Graphite [C] 1 Talc [Mg3Si4O10(OH)2] 1 Shape Crystal System lamellar veins to earthy hexagonal masses flattened or tabular monoclinic Color Luster Streak Cleavage Fracture Specific Gravity steel gray metallic black Yes Yes-flaky 2.2 Yes-basal Yesuneven 2.7-2.8 Yes Yesuneven 2.3 reddishbrown No Yesuneven 5.1 golden greenish metallic yellow black No white to nonwhite green metallic white to tabular, bladed nonmonoclinic colorless white or blocky metallic to gray Gypsum [CaSO4· 2H2O] 2 Hematite [Fe2O3] 6 Pyrite [FeS2] 6 cube, octahedron and isometric pyritohedron Yesconchoidal 5.1 7 colorless to two nonYes-weak Yeshexagonal several white rhombohedrons metallic rhombohedral conchoidal other shades 2.65 Quartz [SiO2] tabular hexagonal steel gray metallic 5. If you find a pale gray mineral that you are able to scratch with your fingernail, which of the following minerals are you most likely to be holding? A. talc B. hematite C. pyrite D. quartz 6. Which type of rock is created when lava cools and hardens? A. cement B. metamorphic C. sedimentary D. igneous 7. Sand on a beach is covered by other layers of sand over time. The extra layers compress the first layer, packing it tighter and tighter. Over time, the bottom layers of sand have formed into sandstone, with colored bands showing the different layers. What kind of rock can sandstone be classified as? A. volcanic rock B. igneous rock C. sedimentary rock D. metamorphic rock 8. Which of the following rocks most likely resulted from compacting and cementing particles together? A. pumice B. marble C. sandstone D. slate 9. Most rocks are A. compounds made of minerals. B. mixtures of minerals. C. mixtures of cells. D. compounds made of cells. 10. Which of the following are true statements about minerals? I. Minerals are naturally occurring substances. II. Each mineral has a specific chemical makeup. III. Minerals can be solids, liquids, or gases. IV. Rocks are made of minerals. A. I, II, and IV only B. II and IV only C. I, II, III, and IV D. I and II only 11. Juanita is modeling the formation of a certain type of mineral. She has dissolved a powder in water and placed the mixture in a shallow dish. Now she will observe the mixture daily and record what happens in the dish as the water evaporates. Which mineral's formation is Juanita most likely modeling? A. halite B. quartz C. magnetite D. calcite 12. Mimi is given four rock samples by her teacher. She is also given the rock identification table below and told that her rocks are obsidian, granite, limestone, and gneiss. Rock Type Texture Mineral Composition Grain Size Obsidian glassy felsic very fine Granite interlocking feldspar and quartz coarse Limestone clastic calcite or dolomite fine Gneiss foliated feldspar and quartz coarse She examines each rock closely to determine its texture. Based on the information in the table, which rock is most likely gneiss? A. X B. Y C. W D. Z W. X. Y. Z.