The mineral fluorite is commonly sold in mineral shops as octahedral (8-sided) objects. This shape originates from ________
A) the growth of fluorite in caves and is the form the crystals grow in the open cavern
B) cutting a larger crystal along four perfect cleavage planes, forming a cleavage fragment
C) the typical crystal form of fluorite
D) a pseudomorph (false form) of fluorite from replacement of a salt, potassium chlorite, that grows in octahedral crystals
B
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A) northerly B) easterly C) westerly D) They move in a clockwise circular pattern.
Geographers stopped finding the concept of subcultures useful around the turn of the twentieth century
Indicate whether the statement is true or false.
Match the physical region with its description.
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Should the periodic table be memorized? Why or why not?
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