What mineral is characterized by a reddish streak, as shown in this photograph?

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


Answer: D

Environmental & Atmospheric Sciences

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National Land Cover Data from the USGS were compiled from:

A. satellite images B. USGS quadrangle maps C. air photos D. field survey data

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What texture is displayed by the igneous rock in this photograph?

A. vesicles B. porphyritic C. glassy D. breccia E. None of these choices are correct.

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Clouds can either heat or cool Earth.

Answer the following statement true (T) or false (F)

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The Audubon Christmas Bird Count is an example of

A. using greeting cards with images of rare species to promote conservation. B. critical mass. C. citizen science.

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