True or False Friedrich Mohs invented a system to smelt two kinds of iron ore.
True or False A vein is a narrow channel or slab of a mineral that is sharply different from the surrounding rock.
The purpose of heating iron ore to a very high temp. in a blast furnace is…. 1.to cool down the hot furnace 2.to heat the iron so that it separates from other elements 3.to eliminate one kind of iron 4.to add hematite to final product
Hard, colorful minerals that have a brilliant or glassy luster are…. 1.crystals 2.gemstones 3.ores 4.metals
What is steel an example of? 1.crystal 2.gemstone 3.ore 4.alloy
Why can’t color alone be used to identify a mineral? 1.luster usually hides a minerals color 2.only a few minerals always have their own characteristic color 3.the color of most minerals is hidden by veins 4.color & streak are never the same color
In a process called __________, an ore is melted to separate the useful metal from other elements in the ore. 1.shaft 2.density 3.smelting 4.mining
The property of ______ is the mass of the mineral sample per unit volume. 1.halite 2.prospector 3.density 4.inorganic
What kind of mine is used when ore deposits occur in veins? 1.prospector 2.shaft 3.ore 4.quartz
A rock that contains a metal or useful mineral is called what? 1.halite 2.quartz 3.ore 4.pyrite
True or False A miner is anyone who searches for an ore deposit.
True or False Minerals form when hot water solution cools & the minerals crystallize.
Could you tell samples of minerals apart just by using a scratch test? Why or why not?
The size of a mineral’s crystals depends on which of the following? 1.the rate of cooling of magma or solution from which mineral is formed 2.the smelting process in which magma is formed 3.the solution from which mineral formed 4.the mineral’s crystal group
Which is NOT one of the 6 types of crystal shapes? 1.cubic 2.triclinic 3.tetragonal 4.metallic