Test Bank For Exploring Earth Science, 3rd Edition All Chapters - 9781260722222.pdf

Internal Structure of the Earth
r r r r
a) 90-100rkm
b) 50-60rkm
1. Whatrisrtherthicknessrofrthercrustrunderrtherm c) 70-80rkm
ountainousrareasrandrinrparticularrtherHimalay d) 30-40rkm
as? ViewrAnswer
a) 50-55rkm Answer:rd
b) 60-65rkm Explanation:rMohorovicicrdiscontinuityrfromrseis
c) 70-75rkm micrevidencerisrdeterminedrthatritrisrapproximate
d) 30-35rkm lyratrardepthrofr30-40rkm.
ViewrAnswer 6. WhatrisrtherspeedrattainedrbyrtherP-
Answer:rc wavesrinrtherC-
Explanation:rItrisrbelievedrthatrtherthicknessrofrth layerrunderrtherContinentalrcrust?
ercrustrunderrtherHimalayasrisr70rtor75rkmrandru a) 6rtor7.6rkm/sec
nderrtherHindukushritrisrsaidrtorber60rkmrthick. b) 3rtor4rkm/sec
2. Therdiscontinuityrwhichrmarksrtherlowerrb c) 5rtor6.3rkm/sec
oundaryrofrthercrustrisr d) 1.8rtor2.5rkm/sec
a) Crust-Mantlerdiscontinuity ViewrAnswer
b) Oceanicrdiscontinuity Answer:ra
c) SIALrlayer Explanation:rTherC-
d) Mohorovicicrdiscontinuity layerrisrtherlowermostrlayerrofrthercontinentalrcr
ViewrAnswer ustrandrherertherP-
rwavesrattainrvelocityrasrhighrasr6rtor7.6rkm/sec.
Answer:rd
Explanation:rMohorovicicrdiscontinuityrmarksrth 7. Therlayerrunderrthercontinentalrcrustrwithrth
erlowerrboundaryrofrthercrustrwhichrisrtherfirstrlay erdensityrofr2.4rtor2.6rg/ccris?
errofrtherEarth. a) A-layer
3. Thergraniterlayerrinrthercrustrisralsorreferredrtor b) B-layer
asr c) C-layer
a) SIAL d) D-layer
b) SIMA ViewrAnswer
c) SLAM Answer:rb
d) SILA Explanation:rTherMiddlerlayerrorrB-
ViewrAnswer layerrofrthercontinentalrcrustrisrrelativelyrdenserc
Answer:ra omparedrtorA-
Explanation:rSIALrstandsrforrSiliconrandrAlumini layerrandrtherdensityrisrsaidrtorber2.4rto
umrandrasrperrthernameritrisrmaderuprofrthertworel 2.6rg/cc.
ementsrandrhencerthername. 8. TherexpansionrofrSIMArisr
4. Therdensityrofrtheroceanicrlayerrinrthercrustrisr a) SiliconrandrManganese
saidrtorber b) SiliconrandrMagnesium
a) 3.00rg/cc c) StrontiumrandrManganese
b) 2.50rg/cc d) StrontiumrandrMagnesium
c) 1.90rg/cc ViewrAnswer
d) 2.00rg/cc Answer:rb
ViewrAnswer Explanation:rSiliconrandrMagnesium.rTherC-
rlayerrunderrthercontinentalrcrustrisrrichrinrSiliconr
Answer:ra
Explanation:rTheroceanicrcrustrisrestimatedrtorh andrMagnesiumrandrhencertherlayerrisralsorsom
averarvolumerofr2.54*109rccrwithranraveragerden etimesrcalledrSIMA.
sityrofr3.00rg/cc. 9. TheroceanicrlayerrisrtherextensionrofrC-
5. TherdepthratrwhichrtherMohorovicicrd layerrofrthercontinentalrcrustrandrArandrB-
iscontinuityroccursrisr layerrarermostlyrabsent.
a) True
b) False
1r|rPr ar gr e

,ViewrAnswer




2r|rPr ar gr e

,Answer:ra dividedrintortworlayersrofr400randr600rkmrthickne
Explanation:rTheroceanicrcrustrisrtherextensionr ssrrespectively.
ofrC-
layerrofrthercontinentalrcrustrthatrmakesrthertoprl 3. Therexactrnaturerofrthermantlerisrcompletelyru
ayerrofrtheroceansrinrmostrcases,rArandrBrlayersr nderstood.
beingrpracticallyrabsentrfromrthere. a) True
b) False
10. Therleastrdenserlayerramongrtherlayersrun ViewrAnswer
derrthercontinentalrcrustrisr Answer:rb
a) A-layer Explanation:rItrisrsaidrthatrtherexactrnaturerofrther
b) B-layer mantlerisrasryetrincompletelyrunderstood.
c) C-layer
d) D-layer 4. WhichrofrtherfollowingrisrnotrtrueraboutrA
ViewrAnswer sthenosphere?
a) Itrisrpresentrinrtherupperrmantle
Answer:ra
b) Itrisrinrsolidrstate
Explanation:rTherArorrtherupperrlayerrisrbetweenr
c) Itrisrthersourcerofrvolcanicractivity
2rtor10rkmrthickrandrisrofrlowrdensity,
d) Itrisrinrplasticrratherrthanrsolidrstate
2.00rg/cc.
ViewrAnswer
11. Therarearnotrconsideredrunderrthercrustris Answer:rb
Explanation:rItrisrinrsolidrstaterisrnotrtruerandrtherr
a) Mountainousrarea emainingroptionsrarertruerandrtheyrarercharacter
b) Continentalrarea isticsrofrtherasthenosphere.rInrGreek,r“asthenes”r
c) Oceanicrarea meansrwithoutrstrengthrandrhencerthername.
d) Glacialrarea
ViewrAnswer 5. WhorwasrtherfirstrpersonrtortellraboutrtherC
Answer:rd ore?
Explanation:rTherfirstrtheroptions,rMountainous, a) GrahamrBell
rContinentalrandrOceanicrareasrarerstudiedrsep
b) AlbertrEinstein
aratelyrwhereasrGlacialrarearisrnotrconsideredru c) IsaacrNewton
nderrstudyrofrthercrustrasrsuch. d) R.D.rOldham
ViewrAnswer
1. Therdepthruprtorwhichrthermantlerisrsaidrtorex Answer:rd
istrisr Explanation:rTherexistencerofrthercorerwasrsugg
a) 2000rkm estedrbyrR.D.rOldhamrinr1906randrsubsequentl
b) 1500rkm yrconfirmedrbyrotherrseismologists.
c) 2900rkm
d) 1800rkm 6. Therdepthratrwhichrthercorerlayerrstartsrandren
ViewrAnswer dsrrespectivelyrisr
a) 2900randr6371rkm
Answer:rc
b) 2000randr5371rkm
Explanation:rThersecondrlayer,rMantle,rliesrbene
c) 2500randr4771rkm
athrthercrustrandrthisrzonerstartingrfromrtherlowerr
d) 2000randr5000rkm
boundaryrofrthercrustrcontinuesruprtorardepthrofr2,
ViewrAnswer
900rkm.
Answer:ra
2. Therthicknessrofrther2rlayersrofrtherupperrma Explanation:rThermantlerextendsruprtortherdepthr
ntlerisrapproximatelyrsaidrtorber ofr2900rkmrandrfromrthatrdepthritrisrthercorerthatri
a) 400randr600rkm srsaidrtorberpresentrandrtherradiusrofrtherEarthrisr
b) 300randr500rkm 6371rkmrandrhencerthercorerisrsaidrtorextendrtillr6
c) 450randr800rkm 371rkm.
d) 300randr400rkm
ViewrAnswer 7. Whichrofrtherfollowingrisrtrueraboutrtherinnerrco
re?
Answer:ra
Explanation:rTherupperrmantlerisrfurther

3r|rPr ar gr e

, a) Itrisrbelievedrtorberarsemirsolidrbody g/ccratrtherboundaryrofrtherinnerrcorerandrbecome
b) Itrisrbelievedrtorberarsolidrbody sr13rg/ccratrthercentrerofrtherEarth.
c) Itrisrbelievedrtorberarliquidrbody
d) Itrisrbelievedrtorberargaseousrbody. 12. Therlayerrwhichrisrsaidrtorsupportrtherslowrm
ViewrAnswer ovingrtectonicrplatesrisr
a) Asthenosphere
Answer:rb
Explanation:rTherinnerrcorerwithrarthicknessrofrar b) Lithosphere
c) Mohorovicrsphere
oundr1790rkmrisrbelievedrtorberarsolidrbody.
d) Corerlayer
8. TherdensityrofrtherEarthrinrthercorerimm ViewrAnswer
ediatelyrafterrthermantlerisr Answer:ra
a) 8rg/cc Explanation:rTherAsthenosphererisrbelievedrtorberl
b) 7.6rg/cc ocatedrentirelyrinrtherupperrmantlerandrsupportsrth
c) 9.9rg/cc erslowlyrmovingrtectonicrplates.
d) 8.7rg/cc
ViewrAnswer 13. Whatrisrtherthicknessrofrtherinnerrcore?
a) 790rkm
Answer:rc
b) 1790rkm
Explanation:rAtrtherbaserofrthermantle,rdensityrisr
c) 2790rkm
inferredrasr5.7rg/ccrthatrjumpsrtor9.9rg/ccratrthert
d) 3790rkm
oprofrthercore.
ViewrAnswer
9. TherlayerrwhichrdoesrnotrtransmitrtherS- Answer:rb
rwavesrisr Explanation:rTherinnerrcore,risrbelievedrtorberinrs
a) Outerrcore olidrmetallicrstaterandrisrsaidrhaverthicknessrofra
b) Crust boutr1790rkm.
c) Mantle
d) Innerrcore 14. Therlayerrwhichrisrbelievedrtorberthers
ViewrAnswer ourcerofrvolcanicractivityrisr
Answer:ra a) Innerrcore
Explanation:rTherouterrcorerbehavesrmorerlikerarl b) Outerrcore
c) Asthenosphere
iquidrbecausertherS-
d) Mohorovicicrlayer
wavesrfromrtherearthquakershocksrreachingrthisr
zonerarernotrtransmittedrthroughrthisrzoneratrall. ViewrAnswer
Answer:rc
10. Thererisrarhypothesisrthatrtherinnerrcorerisrm Explanation:rTherasthenosphererisrbelievedrtorb
aderuprchieflyrofrironrandrnickel. erthersourcerofrmuchrvolcanicractivityrandrmanyr
a) True otherrprocesses.rItrisrsaidrbertorlocatedrcomplet
b) False elyrinrtherupperrmantle.
ViewrAnswer
Answer:ra Atmosphere
Explanation:rAsrregardsrtherchemicalrcompositio
nrofrtherinnerrcore,rtherhypothesisrthatritrisrmaderu
prchieflyrofrironrandrnickelrelementsrhasrfoundrsu 1. Whichrofrtherfollowingraboutrweatheringrisrn
pportrfromrmanyraccounts. otrtrue?
a) Itrisrarnaturalrprocess
11. TherdensityrofrtherEarthratritsrcentrerisrsaidrtor b) Mechanicalrdisintegrationrisrinvolved
ber c) Chemicalrdecompositionrisrinvolved
a) 9.9rg/cc d) Itrisrarrapidrprocess
b) 8.8rg/cc ViewrAnswer
c) 13rg/cc Answer:rd
d) 12.7rg/cc Explanation:rWeatheringrisrdefinedras,rarnatural
ViewrAnswer rprocessrof rin-
Answer:rc siturmechanicalrdisintegrationrandrorrchemicalrd
ecompositionrofrtherrocksrofrthercrustrofrtherEart
hrbyrcertain
4r|rPr ar gr e