ESS 101 QUIZ QUESTIONS AND
ANSWERS
Which=lines=get=closer=as=they=approach=the=poles?
=Lines=of=latitude=or=lines=of=longitude?=-=ans-✔✔Longitude
Draw=a=diagram=showing=lines=of=latitude=and=longitude=on=a=globe=that=indicates=you
r=answer=to=which=of=the=lines=get=closer=as=they=approach=the=poles.=-=ans-✔✔
What=could=explain=the=asymmetry=of=magnetic=stripes=on=the=ocean=floor?=-=ans-
✔✔The=seafloor=spreading=with=reversing=poles=of=the=earth=with=the=cooling=of=mag
ma=locking=the=magnetism=into=the=earth.
What=is=the=difference=between=fracture=and=cleavage=for=a=mineral?
=How=can=you=distinguish=between=them=when=looking=at=a=sample?=-=ans-
✔✔Cleavage=is=the=break=of=a=crystal=face=whereas=the=fracture=is=the=chipping=of=th
e=mineral.=The=fracture=leaves=a=rough=and=uneven=surface=but=the=cleavage=is=split=
along=a=plane.=Cleavages=are=flat=and=reflect=light.
What=does=mafic=mean?=-=ans-✔✔Dark=colored,=richer=in=Mg=and=Fe
What=are=two=mafic=minerals?=-=ans-✔✔Pyroxene,=Plagioclase
What=does=felsic=mean?=-=ans-✔✔light=colored,=feldspar=and=quartz
What=are=two=felsic=minerals?=-=ans-✔✔quartz,=muscovite,=orthoclase
What=does=Bowen's=reaction=series=represent?=-=ans-
✔✔Bowen's=reaction=series=is=a=means=of=ranking=common=igneous=silicate=minerals=
by=the=temperature=at=which=they=crystallize.
How=do=porphyritic-textured=igneous=rocks=form?=-=ans-
✔✔In=the=first=stage,=the=magma=is=cooled=slowly=deep=in=the=crust,=creating=the=larg
e=crystal=grains=then=the=magma=cools=rapidly=at=shallow=depths/
as=it=erupts=from=a=volcano,=creating=the=small=grains.
ANSWERS
Which=lines=get=closer=as=they=approach=the=poles?
=Lines=of=latitude=or=lines=of=longitude?=-=ans-✔✔Longitude
Draw=a=diagram=showing=lines=of=latitude=and=longitude=on=a=globe=that=indicates=you
r=answer=to=which=of=the=lines=get=closer=as=they=approach=the=poles.=-=ans-✔✔
What=could=explain=the=asymmetry=of=magnetic=stripes=on=the=ocean=floor?=-=ans-
✔✔The=seafloor=spreading=with=reversing=poles=of=the=earth=with=the=cooling=of=mag
ma=locking=the=magnetism=into=the=earth.
What=is=the=difference=between=fracture=and=cleavage=for=a=mineral?
=How=can=you=distinguish=between=them=when=looking=at=a=sample?=-=ans-
✔✔Cleavage=is=the=break=of=a=crystal=face=whereas=the=fracture=is=the=chipping=of=th
e=mineral.=The=fracture=leaves=a=rough=and=uneven=surface=but=the=cleavage=is=split=
along=a=plane.=Cleavages=are=flat=and=reflect=light.
What=does=mafic=mean?=-=ans-✔✔Dark=colored,=richer=in=Mg=and=Fe
What=are=two=mafic=minerals?=-=ans-✔✔Pyroxene,=Plagioclase
What=does=felsic=mean?=-=ans-✔✔light=colored,=feldspar=and=quartz
What=are=two=felsic=minerals?=-=ans-✔✔quartz,=muscovite,=orthoclase
What=does=Bowen's=reaction=series=represent?=-=ans-
✔✔Bowen's=reaction=series=is=a=means=of=ranking=common=igneous=silicate=minerals=
by=the=temperature=at=which=they=crystallize.
How=do=porphyritic-textured=igneous=rocks=form?=-=ans-
✔✔In=the=first=stage,=the=magma=is=cooled=slowly=deep=in=the=crust,=creating=the=larg
e=crystal=grains=then=the=magma=cools=rapidly=at=shallow=depths/
as=it=erupts=from=a=volcano,=creating=the=small=grains.
