Who left Spain in September 1519 and became the first person to complete a circumnavigation of the globe when he returned to Spain three years later?
A) Giovanni Caboto
B) Ferdinand Magellan
C) Juan Sebastian del Caño
D) Vasco Nunez de Balboa
E) Vasco da Gama
C
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Africa, Asia, and Latin America entered stage 2 of the demographic transition as a result of
A) the industrial revolution. B) the medical revolution. C) the scientific revolution. D) the agricultural revolution. E) the computer revolution.
MgCl2 crystals are composed of
A) units of MgCl2 molecules held together by dipole interactions. B) groups of Mg2+ ions and Cl2 molecules. C) units composed of six Mg atoms and six Cl2 molecules. D) a multitude of Mg2+ ions and Cl- ions grouped together in a three-dimensional array with a 1:2 ratio of Mg2+ to Cl-. E) a two-dimensional array of [-Mg-Cl-Cl-] units.
Use your knowledge of plate boundaries to answer whether a volcano is likely or unlikely to form at the location of the red triangle.
A. likely B. unlikely
______ is the idea that continents move freely over Earth's surface, changing their positions relative to one another.
What will be an ideal response?