MINERALS ESS 101 MIDTERM QUESTIONS AND CORRECT ANSWERS.pdf

MINERALS ESS 101 MIDTERM
QUESTIONS AND CORRECT ANSWERS
Whatsmineral sgroupsissasmajorseconomicssource sof sleadsandscopper?s-sCORRECTsANSWER-sulfide



We sknowsthatsquartzsdidn'tsformswell sdefined,s6ssidedsprismaticscrystalssinsthesrocksgranite,swhilesothersmi
neralssdid.sBasedsonsthatsinfo,sonescansinfersthatsquartzscrystallizeds______sandshassas______smeltingstemp
ature sthansthe sothersmineralssinsthesrock.s-sCORRECTsANSWER-last

lower



Magneticsmineralssthatscrystallize sinsaslavasflowseruptedsnearsthesEquatorstodayswill?s-sCORRECTsANSWER-
1.swill sbesorientedsperpendicularstossurfacesof slavasflow

2.swill shave snormalspolaritysandspointstowardssmagneticsnorth



Howsare smineralssproducedsonsEarth?s-sCORRECTsANSWER-
1) smineralsscanscrystallizesdirectlysfromsasmagneticsmelt

2) smineralsscansprecipitatesfromsaqueousssolutions



Whatsmineral sgroupsissasmajorseconomicssource sof slead?s-sCORRECTsANSWER-sulfide



Whatsmineral sgroupsissasmajorseconomicssource sof siron?s-sCORRECTsANSWER-oxide



Whatsare smeteriotessthatsstrike sthesEarthspredominatelyscomposedsof?s-sCORRECTsANSWER-iron-
nickel sandssilicate sminerals



The ssilicatesmineralsbiotiteshass3ssharedsoxygensatomssandsIsunshared.sWhat'ssthesratiosofsSi:Osinsthestetra
hedral sstructure sofsthissmineral?s-sCORRECTsANSWER-1:2.5



Whatsmineral sgroupsissasmajorseconomicssource sof slimesforscement?s-sCORRECTsANSWER-carbonate

, Whatsmineral scrystallizedsfirst?s(see spinkssheets#17) s-sCORRECTsANSWER-
small sblacksmineralsincludedswithswhitesmineral



(pinks#22) sThe ssilicate smineralsamphiboleshass50%sofsitsssilicate stetrahedraspossesings3ssharedsoxygensato
mssands1sunsharedsands50%sofsitsssilicate sposessings2ssharedsands2sunsharedsoxygensatoms.sWhat'ssthe srat
iosof sSi:O?s-sCORRECTsANSWER-1:2.75



MagneticsmineralsscrystaliizedsinslavasflowsbysSouthsPolestodayswill?s-sCORRECTsANSWER-
1.sbe sorientedsperpendicularstosthessurfacesofstheslavasflow

2.swill shave snormalspolaritysandspointstowardssmagneticsnorth



WhysdoessCa-
richsplagioclase sdevelopscleavage splanessyetsitsissasframeworkssilicate smineralswithsall sitssoxygensatomsssha
redsbetweenstetrahedra?s-sCORRECTsANSWER-
thissmineral smayshavesansAlsatomsinsitsstetrabedraswhichsrequiressadditional sionicsbondsswithsCasatoms



magneticsmineralssthatscrystallize sinsaslavasflowseruptedsnearsthesNorthsPolestodayswill?s-
s CORRECTs ANSWER-bes oriented s perpendiculars tos surfaces ofs lavasflow




Mostsminedsironsore soccurssinswhatsmineral sgroup?s-sCORRECTsANSWER-oxide



Mostsmetallicsore sbodies,ssuchsasslead,ssilversandscoppersoccursinsthes__________smineral sgroup.s-
s CORRECTs ANSWER-sulfide




What'ssthe ssignificancesofs(OH)sinsthe samphibolescrystal sstructure?s-sCORRECTsANSWER-
it'sswaterslikelysincoporatedsduringssubductionsprocess



VansdersWaal sforcessdiscussedsinsthesPP?s-sCORRECTsANSWER-1.sLondonsforces

2.sDipole-dipolesinteractiom



Ranksbondssfromsweakeststosstrongests-sCORRECTsANSWER-VansdersWaal,smetallic,sionic,scovalent