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-your-
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-magma-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-the-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-large-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-your-
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-magma-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-the-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-large-crystal-grains-then-the-magma-cools-
rapidly-at-shallow-depths/as-it-erupts-from-a-volcano,-creating-the-small-grains.
