Question 5 ___________ minerals are dark-colored because they contain _____________.  Mafic; iron and/or magnesium Mafic; calcium, sodium, or potassium Felsic; calcium, sodium, or potassiumFelsic; iron and/or magnesiumQuestion 6  Which of the following is NOT a characteristic of a mineral?  naturally occuring multiple chemical compositions crystal structureinorganic in originQuestion 7 What are the 2 most common elements in minerals we find in the earth’s crust? Oxygen and Silicon  Carbon and Nitrogen Iron and Silicon Iron and MagnesiumQuestion 8 What property would you use to distinguish between augite and hornblende?  hardness cleavage crystal shape colorQuestion 9 During mineral identification process, geologists can utilize color of mineral to find out whether it is  Mafic or Felsic Salted or Unsalted Metallic or Non metallic Magnetite or HematiteQuestion 10 These minerals are often similar in color but can be distinguished by their ____ streak color.  Magnesite- White, Magnetite- Black Hematite- Red, Magnesite- White Halite- White, Magnetite- Black Hematite- Red, Magnetite- BlackQuestion 11 What are the best properties for distinguishing the black minerals biotite and hornblende apart? cleavage and streak hardness and cleavage hardness and color color and streakQuestion 12 Multiple answer question !Regarding crystal size of igneous rocks, which statements  are trueSlow rate promotes growth of fewer but larger crystals Very fast cooling forms glassVery fast cooling forms the biggest crystals Fast rate forms many small crystalsQuestion 13Which mineral group make up the majority of the Earth’s crust? Sulphide  Silicate Halide PhosphateQuestion 14  What is the most important use of apatite?  ceramic tile gemstone dog food phosphorous for fertilizerQuestion 15 Quartz and feldspar share a similar ____________ silicate structure. single-chain sheet double-chain frameworkQuestion 16 Which of the following minerals has 3 good cleavages that are NOT at 90 degrees? fluorite dolomite galena haliteQuestion 17  When a mineral breaks, it often does so along its plane or planes, which is known as  luster. cleavage. hardness. streak.Question 18 The following process results in which type of rocks?Step 1. Sedimentary rocks melt underneath the ground due to high temperature and produce magma.Step 2. This magma rises and reaches the near surface (still under the ground).Step 3. The magma cools down and forms a rock. Sandstone Sedimentary Rhyolite Igneous MetamorphicQuestion 19 1 ptsThe following process results in which type of rocks?Step 1. Metamorphic rocks melt underneath the ground due to high temperature and produce magma.Step 2. This magma rises and reaches the near surface (still under the ground).Step 3. The magma cools down and forms a rock. Igneous Sedimentary Rhyolite Sandstone MetamorphicQuestion 20 There are two main forces which are involved in constantly changing the rocks from one form (igneous or sedimentary or metamorphic)  to another. Among the following options please find the above mentioned forces. [choose two correct answers] The hydrological cycle Wind Cosmic rays Earth’s internal heat Gravitational forceQuestion 21 Magma that reaches the surface (extrudes onto the surface) is called ______? granite quartz pumice lavaQuestion 22  Extremely coarse crystalline igneous texture is called _______?  pyritic pegmatitic pyroclastic phenocrystallicQuestion 23 Which of the following gases is NOT commonly found in magma and lava? carbon monoxide (CO) sulfur dioxide (SO2) water vapor (H2O) carbon dioxide (CO2)Question 24 Large amounts of iron and magnesium elements would most likely be present in ___________ igneous rocks?  rhyolitic and granite mafic or ultramafic felsic and mafic intermediate or felsicQuestion 25 Aphanitic igneous rocks form when magma cools _________________? slowly underground faily rapidly on the surface of the ground slowly on the surface of the ground rapidly undergroundQuestion 26  A porphyritic rock contains both ________ and __________.  phenocrysts; groundmass phenocrysts; vesicles vesicles; crystals pegmatites; groundmassQuestion 27  Which of the following ARE examples of phaneritic igneous rocks?  diorite and andesite basalt and gabbro granite and rhyolite granite and dioriteQuestion 28____________ melting takes place with in the Earth when a body of rock is held at approximately the same temperature but the pressure is reduced.   Flux Decompression Plume HeatedQuestion 29  What is an aphanitic texture in igneous rocks? a coarse-grained texture in which all crystals are visible to thenaked eye a texture in which some crystals are bigger than others, but all are visible to the naked eye a glassy texture in which all crystals are visible to the naked eye a fine-grained texture in which crystals are present, but generally not visible to the naked eyeQuestion 30  What type(s) of igneous rock(s) is/are most likely to form along an oceanic-continental type of convergent plate boundary?  granitic and andesitic granitic and basaltic andesitic and basaltic graniticQuestion 31 Igneous rocks that solidify or cool on the Earth’s surface are called ____? extrusive or intrusive intrusive or plutonic extrusive or plutonic extrusive or volcanicQuestion 32 Which of the following is NOT an example of a phaneritic igneous rock?  diorite rhyolite gabbrograniteQuestion 33 Mafic igneous rocks melt at ____________ temperatures than felsic igneous rocks? higher lower or higher lower the sameQuestion 34  Which of the following rocks are igneous?  basalt and sandstone sandstone and limestone granite and sandstone granite and basaltQuestion 35 Where can decompression melting be found? Multiple answers divergent plate boundaries mantle plumes active margins convergent boundariesQuestion 36You were given a rock, and you were told that  rock has phaneritic texture and the following composition:Quartz: 25% K-feldspar: 25% Plagioclase feldspar : 45%Biotite: 10% . Which rock is this?  Shale Diorite Granite Basalt

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