What mineral is shown in this photograph?

A. hematite
B. quartz
C. calcite
D. feldspar
E. magnetite


Answer: C

Environmental & Atmospheric Sciences

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A) 10-15 B) 2-4 C) 5-10 D) 15-20 E) 20-25

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Subarctic climate with very cold winters are common in the Southern Hemisphere

Indicate whether the statement is true or false

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According to energy expert Amory Lovins, what is the best way to provide energy services?

A. increase energy efficiency B. build more nuclear power plants C. build more wind turbines D. develop our full geothermal potential

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Which of the following periods belongs to the Mesozoic era?

A) Triassic B) Cambrian C) Paleogene D) Devonian

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