Mr Nelson 6th grade Earth Science Adv
Help!
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| because minerals do NOT come from once living material, they are said to be: | inorganic
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| in a mineral, particles line up in a repeating pattern to form a: | crystal
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| which one is used to determine color of a minerals powder- luster, cleavage, or streak | streak
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| Halite is a mineral formed through the evaporation of- magma, a solution, or lava | a solution
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| Minerals from which metals can be removed in usable amounts are called: ores, crystals, or gemstones | ores
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| A hollow rock lined with crystals is a | geode
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| Mineral deposits beneath Earth's surface that are different from the surrounding rocks are called | veins
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| Steel is an example of an | alloy
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| the color of a minerals streak is always the same? true or false | true
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| what are 2 ways minerals can form? | crystallization of magma, crystallization of minerals from solutions
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| minerals can form when magma cools beneath or when lava cool on the earth's surface? true or false | true
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| minerals can also form with they crystallize as a solution cools or evaporates? true or false | true
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| pure element | composed of atoms of a single element
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| most minerals are composed of a single element? true or false | false-most minerals contain at least 2 elements
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| luster | how the light is reflected
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| how can minerals be identified? | streak, color, luster, density, hardness, cleavage, fracture, crystal structure
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| cleavage | the way a mineral splits along even flat line
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| fracture | when a mineral doesn't split along lines, but rather breaks in jagged ways
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| are minerals naturally occuring? | yes
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| was any part of a mineral ever alive? | no
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| minerals have a definate volume and shape? true or false | true
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| can coal, which forms from the remains of plants, be considered a mineral? | no, because a mineral must be INorganic
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| for a substance to be a mineral it needs to have 5 characteristics-what are they? | naturally occurring, inorganic, solid, crystal structure, and definate chemical composition
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| geologist use what tool to measure density | a balance
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| density is mass divided by volume? true or false | true
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| test that describes the hardness of minerals | Mohs hardness scale
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| hardness can be determined by which test | scratch test
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| which mineral when frctured, looks like the surface of a seashell? | quartz
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| what describes how a mineral looks when it breaks apart in an irregular way? | fracture
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| what describes how a mineral looks when it breaks apart easily along a flat surface? | cleavage
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| there are some other special ways to identify some minerals-can you name 2? | fluorescence, magnetism
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| minerals can form from 2 things-what are they | magma or lava, and solutions
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| minerals can form ONLY on the earths surface? true or false? | false-they can form on and under the surface
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| name 2 useful ways minerals are used | gemstones, and metals
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| a soft mineral that is used to make powder | talc
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| how do we get metals from minerals? | they have to be mined, and then the metal removed from the mineral
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| name one mineral that can be mined and then sold | ore
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| anyone who searches for ore | prospector
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| how do miners know where to find the ore deposits in the earth? | geologists' map
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| what is the process called where ore is mixed with other substances and then melted to seperate the useful metal from the other elements | smelting
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| what do we call a solid mixture of two or more elements with characteristics of metal | alloy
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| give one example of an alloy | steel
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| if a mineral has a hardness of 5, and another mineral has a hardness of 8, which one could scratch glass? | 8
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| what would be the best test to determine if a mineral you found was real or fake gold? color, streak, or luster? | streak-because pyrite (fake gold) has a different streak than real gold
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