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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Which of the following periods belongs to the Mesozoic era?
A) Triassic B) Cambrian C) Paleogene D) Devonian
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Ecological footprints of American and Europeans are ________ times larger than those in poor countries
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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