Placer deposits are surface accumulations resulting from the mixing of materials as they are transported
Indicate whether the statement is true or false
False
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What parts of Sub-Saharan Africa are most vulnerable to global climate change?
A) the tropical rainforests B) the arid and semi-arid regions C) highland regions D) the cities E) the temperate zones
The albedo of the moon is 7%. This means that:a
7% of the sunlight striking the moon is reflected. b. 7% of the sunlight striking the moon is absorbed. c. the moon emits only 7% as much energy as it absorbs from the sun. d. 93% of the sunlight striking the moon is reflected.
The synthesis of cholesterol is completed by the condensation of which of the following?
A) two farnesyl pyrophosphates B) two geranyl pyrophosphates C) a farnesyl pyrophosphate with a geranyl pyrophosphate D) none of the above
What does the tendency of micas to produce thin cleavage flakes suggest about its crystal structure?
A) The structure is produced by flow in the igneous rock, aligning glass layers within the crystal structure. B) The structure is characterized by rings that form an interlocking network, forming planar sheets. C) The crystal structure is characterized by complex polymerized mats that form a sheetlike structure. D) The atoms are arranged in orderly arrangements that form strongly bonded sheets separated by weak bonds between the sheets.