Which mineral does not contain abundant potassium?
A) feldspar
B) biotite
C) muscovite
D) calcite
Answer: D
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The instrument used to measure atmospheric pressureis called a(n)_______________
Fill in the blank(s) with correct word
Pencil lead is made of ________.
A. graphite B. galena C. coal D. gypsum E. lead
What is the main drawback of all-electric cars that do not consume any fossil fuels onboard?
A. They still depend on burning coal to be recharged. B. They increase the emission of ozone depleting chemicals. C. They consume more energy than they save. D. They only work in tropical to temperate climates.
Although there is technical access to Internet services all over the world, the cost of access is still too high for many poor people. This is known as the ________ and can have significant ramifications for many countries, especially in Africa
Fill in the blank(s) with the appropriate word(s).