Science test Flashcards
what common metal was worth more per ounce than gold before scientists found a practical means of xtracting it from ore
aluminum
Which of these is not a mineral asbestos, platinum, feldspar, or lequid water
Liquid water
the mineral cinnabar also called mercury sulfide, is an important source or _____ of mercury
ore
which of the following is a mixture copper diamond sand seawater
seawater
sulfur is native to mineral as quatz is to ______ ______
compound mineral
what is a mineral with only one kind of atom
native minerals
what are two or more substances combined but not chemically bonded
a mixture
copper resists corrosiion because it froms a tough outlet layer when it tarnisheds
true
all minerals are compose of two or more elements
false
a geologist who studis and idetnities mineral samples is called a what
mineralogists
what is the color of a minera’s powdera called
streak
all native minearls are pure elements
true
a minera’s steak is a more reliable way to classify a minearl than its apparent color
true
some minerals can have more than one color
true
the amount and quality of the light reflected form a minera’s surface is called what
luster
some minerals are too had to leave astreak on a streak plate
true
the process by which a crystal gows is called _________
accretion
if a minearl produces regular flat sufaces when it breaks then it exhibits
cleavage
cleavage and fracture both refer to the characteristic way in which a mineral breaks
true
the Mohs scale is used to rate a minear’s resistance to fractureing
false
which of teh following minerals has perfect cleavage magnetite mica pyrite or quartz
mica
obsidian a mineral of volcanic orign breaks in smooth curves suraces what property deos it show
fracture
a minearl rated as 1 on the mohs scale is what
soft
what is the ratio of the density of a speciment to the density of water at 4 C
specific gravity
when you conduct an acid test on a minraal sample you are watching for what
gas bubbles
a dark minearl sample attracts iro fillings you could consclude that the mineral is what
magnetite
a mineral sample that can glow for extended periods in the dark is said to be readioactive
false
What is the glow caused by ultraviolet light illumination
flurescence
what is the bending of light called
refraction
_______ _________ occurs when a minera’s crystal structure splits a light beam passin thorough it into two parts thus two images ares seen though a transparent crystal
Double reraction
a mineral sample gives a strong reading on a geiger counter you could conclude that the mineral is
pitchblende
a tranparent mineeral fluoresces red and exhibit doubl refraction you could conclude that the miner is
calcite
the brilliance of a diamond is due to its high index of ________
refraction
which of the following is not a vative mineral copper gold quartz silver
quartz
placer deposits of mineral sediments are found deep underground
false
the best metallic condcutor of eletricity is what
silver
diamond is composed of carbon
true
deep vertical shaft of rock produced by volcanic activity in which diamonds are frequently called waht
diamond pipes
a carat is a unit of what
mass
he most abunant family or class of minerals is the _____
silicates
oxides are compounds that consits of_______ and another elemtne usually a metal
oxygen
scientists theorize that some macaws eat caly because they have what
a mineral deficiency
fool’s gold a mineral of iron and sulfur, is classified as a what
sulfide
mineral salts are properaly called what
halides
the harder it is to obtian a mineral, the more common it becomes
false
