Question
click below
click below
Question
Normal Size Small Size show me how
chp 3 minerals
Mr Nelson 6th grade Earth Science Adv
Question | Answer |
---|---|
because minerals do NOT come from once living material, they are said to be: | inorganic |
in a mineral, particles line up in a repeating pattern to form a: | crystal |
which one is used to determine color of a minerals powder- luster, cleavage, or streak | streak |
Halite is a mineral formed through the evaporation of- magma, a solution, or lava | a solution |
Minerals from which metals can be removed in usable amounts are called: ores, crystals, or gemstones | ores |
A hollow rock lined with crystals is a | geode |
Mineral deposits beneath Earth's surface that are different from the surrounding rocks are called | veins |
Steel is an example of an | alloy |
the color of a minerals streak is always the same? true or false | true |
what are 2 ways minerals can form? | crystallization of magma, crystallization of minerals from solutions |
minerals can form when magma cools beneath or when lava cool on the earth's surface? true or false | true |
minerals can also form with they crystallize as a solution cools or evaporates? true or false | true |
pure element | composed of atoms of a single element |
most minerals are composed of a single element? true or false | false-most minerals contain at least 2 elements |
luster | how the light is reflected |
how can minerals be identified? | streak, color, luster, density, hardness, cleavage, fracture, crystal structure |
cleavage | the way a mineral splits along even flat line |
fracture | when a mineral doesn't split along lines, but rather breaks in jagged ways |
are minerals naturally occuring? | yes |
was any part of a mineral ever alive? | no |
minerals have a definate volume and shape? true or false | true |
can coal, which forms from the remains of plants, be considered a mineral? | no, because a mineral must be INorganic |
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 |
geologist use what tool to measure density | a balance |
density is mass divided by volume? true or false | true |
test that describes the hardness of minerals | Mohs hardness scale |
hardness can be determined by which test | scratch test |
which mineral when frctured, looks like the surface of a seashell? | quartz |
what describes how a mineral looks when it breaks apart in an irregular way? | fracture |
what describes how a mineral looks when it breaks apart easily along a flat surface? | cleavage |
there are some other special ways to identify some minerals-can you name 2? | fluorescence, magnetism |
minerals can form from 2 things-what are they | magma or lava, and solutions |
minerals can form ONLY on the earths surface? true or false? | false-they can form on and under the surface |
name 2 useful ways minerals are used | gemstones, and metals |
a soft mineral that is used to make powder | talc |
how do we get metals from minerals? | they have to be mined, and then the metal removed from the mineral |
name one mineral that can be mined and then sold | ore |
anyone who searches for ore | prospector |
how do miners know where to find the ore deposits in the earth? | geologists' map |
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 |
what do we call a solid mixture of two or more elements with characteristics of metal | alloy |
give one example of an alloy | steel |
if a mineral has a hardness of 5, and another mineral has a hardness of 8, which one could scratch glass? | 8 |
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 |