CALIFORNIA GEOLOGY MIDTERM
EXAM WITH CORRECT ANSWERS
What care cthe cdifferent ckinds cof cplate cboundaries? cwhat cis cthe crelative cmotion cof
ceach cboundary? c- ccorrect canswers c-3 ctypes:
1. csubduction c(conversion) c-plates ccrash cinto ceach cother
2. cTransform cplate cboundary- cplates cslide cpast ceach cother
3. cDivergent cplate cboundary- cplates cmove caway cfrom ceach cother c(mid cocean
cridges)
How cis cthe cglobal cpattern cof cearthquake cand cvolcano clocations crelated cto cplate
ctectonics? c- ccorrect canswers c-Plates cdefine cearthquakes cand cvolcanoes. cMainly
csubduction cplate czones
Describe cthe clayered cstructure cof cthe cearth c(crust-mantle-core). cWhat cis ceach
clayer ccomposed cof? cAbout chow cthick cis ceach clayer? c- ccorrect canswers c-Layered
cstructure: cMantle cand ccore. cThe ccore cis ccomposed cof cinner csolid cmostly ciron
, ccore cand couter cliquid ccore. cThe cMantle cis ciron, cmagnesium, cand csilicates. cThe
cmantle ccontains clower cmantle c(thickest) c, cAsthenosphere c(less cthick), cand
cLithosphere c(Thinnest).
What cdefines cthe c"plate" cin cplate ctectonics? cHow cthick cis can cocean cplate? c-
ccorrect canswers c-Lithosphere= ccrust cand crigid cupper cmantle cBRITTLE. cmove
crelative cto ceach cother. cAn cocean cplate cis c5 cmiles cin cthickness, cmuch cthinner
cthan ccontinental cplates.
What care cthe cdifferences cbetween ccontinental cand coceanic ccrust? c- ccorrect
canswers c-continental-formed cfrom cconvergent cplate cboundaries, cfelsic c+
ctransitional crocks
oceanic- cformed cfrom cdivergent cplate cbondaries, cmafic crocks
How cold cis cthe coldest cocean ccrust cand chow cdoes cthat ccompare cwith ctheage cof
cthe ccontinental ccrust? c- ccorrect canswers c-ocean ccrust cis cconsantly cre cforming,
caround c200 cmyo
continental ccrust ctakes ca clong ctime cto cform crarely cdestroyed- c1 c- c4 cbillion cyo
What cis cthe cdifference cbetween cthe ccrust cof cthe cearth cand cthelithosphere? c-
ccorrect canswers c-Lithosphere cis cuppermost cmantle, cand cbrittle. cCrust cis cpart cof
clithosphere
What cis cthe cnature cof cthe cchange cacross cthe ccrust-mantle cboundary cand cthe
clithosphere-asthenosphere cboundary? c(mineralogy/chemistry cchange cversus
cmechanical cchange...) c- ccorrect canswers c-the ctransition cfrom clithosphere cto ccrust
cis cchemical
the ctransition cfrom casthenosphere cto clithosphere cis cflowing cmagma cto cbrittle
What ccauses cthe cplates cto cmove? c- ccorrect canswers c-convection ccurrents cin cthe
cmantle
What care ctypical crates cof cplate cmotions? c- ccorrect canswers c-1-10 ccm cper cyear
How cdo cwe cknow cthese crates? c- ccorrect canswers c-gps- crelative cand cabsolute
cplate cvelocity
Why cdoes cthe coceanic clithosphere csubduct? c- ccorrect canswers c-its coverall cdensity
cis cgreater cthan cthe cunderlying cmantle
What ckind cof cplate cboundaries care cin cCA cand cwhere care cthey? c- ccorrect
canswers c-1. cconvergent cplate cboundaries- ccascades
2. cDivergent- csalton csea
3. cTransform- csan candreas cfault
EXAM WITH CORRECT ANSWERS
What care cthe cdifferent ckinds cof cplate cboundaries? cwhat cis cthe crelative cmotion cof
ceach cboundary? c- ccorrect canswers c-3 ctypes:
1. csubduction c(conversion) c-plates ccrash cinto ceach cother
2. cTransform cplate cboundary- cplates cslide cpast ceach cother
3. cDivergent cplate cboundary- cplates cmove caway cfrom ceach cother c(mid cocean
cridges)
How cis cthe cglobal cpattern cof cearthquake cand cvolcano clocations crelated cto cplate
ctectonics? c- ccorrect canswers c-Plates cdefine cearthquakes cand cvolcanoes. cMainly
csubduction cplate czones
Describe cthe clayered cstructure cof cthe cearth c(crust-mantle-core). cWhat cis ceach
clayer ccomposed cof? cAbout chow cthick cis ceach clayer? c- ccorrect canswers c-Layered
cstructure: cMantle cand ccore. cThe ccore cis ccomposed cof cinner csolid cmostly ciron
, ccore cand couter cliquid ccore. cThe cMantle cis ciron, cmagnesium, cand csilicates. cThe
cmantle ccontains clower cmantle c(thickest) c, cAsthenosphere c(less cthick), cand
cLithosphere c(Thinnest).
What cdefines cthe c"plate" cin cplate ctectonics? cHow cthick cis can cocean cplate? c-
ccorrect canswers c-Lithosphere= ccrust cand crigid cupper cmantle cBRITTLE. cmove
crelative cto ceach cother. cAn cocean cplate cis c5 cmiles cin cthickness, cmuch cthinner
cthan ccontinental cplates.
What care cthe cdifferences cbetween ccontinental cand coceanic ccrust? c- ccorrect
canswers c-continental-formed cfrom cconvergent cplate cboundaries, cfelsic c+
ctransitional crocks
oceanic- cformed cfrom cdivergent cplate cbondaries, cmafic crocks
How cold cis cthe coldest cocean ccrust cand chow cdoes cthat ccompare cwith ctheage cof
cthe ccontinental ccrust? c- ccorrect canswers c-ocean ccrust cis cconsantly cre cforming,
caround c200 cmyo
continental ccrust ctakes ca clong ctime cto cform crarely cdestroyed- c1 c- c4 cbillion cyo
What cis cthe cdifference cbetween cthe ccrust cof cthe cearth cand cthelithosphere? c-
ccorrect canswers c-Lithosphere cis cuppermost cmantle, cand cbrittle. cCrust cis cpart cof
clithosphere
What cis cthe cnature cof cthe cchange cacross cthe ccrust-mantle cboundary cand cthe
clithosphere-asthenosphere cboundary? c(mineralogy/chemistry cchange cversus
cmechanical cchange...) c- ccorrect canswers c-the ctransition cfrom clithosphere cto ccrust
cis cchemical
the ctransition cfrom casthenosphere cto clithosphere cis cflowing cmagma cto cbrittle
What ccauses cthe cplates cto cmove? c- ccorrect canswers c-convection ccurrents cin cthe
cmantle
What care ctypical crates cof cplate cmotions? c- ccorrect canswers c-1-10 ccm cper cyear
How cdo cwe cknow cthese crates? c- ccorrect canswers c-gps- crelative cand cabsolute
cplate cvelocity
Why cdoes cthe coceanic clithosphere csubduct? c- ccorrect canswers c-its coverall cdensity
cis cgreater cthan cthe cunderlying cmantle
What ckind cof cplate cboundaries care cin cCA cand cwhere care cthey? c- ccorrect
canswers c-1. cconvergent cplate cboundaries- ccascades
2. cDivergent- csalton csea
3. cTransform- csan candreas cfault
