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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Should the periodic table be memorized? Why or why not?
A. No. The periodic table changes every year. Memorizing it would be a waste of time. B. Yes. Like the alphabet, we need to memorize the periodic table in order to easily write the language of chemistry. C. No. The periodic table is a reference to be used, not memorized. D. Yes. Without memorizing the periodic table, one would not have any real understanding of how and why chemical compounds are put together.
Global winds between 40 and 60 degrees South latitude blow Westerly. What direction do surface currents move in this region?
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.
A) Continental Margin of Plains, Hills, continental shelves, and islands B) Backbone of unstable mountains and volcanic ranges C) Central Mountains and Plateaus of China and Mongolia D) Tibetan Plateaus 70) An uplifted massif in the Southwest of China 71) Japanese archipelago 72) Roof of the World 73) Ring of Fire