Which laboratory equipment is needed to prepare solutions of known %(v/v)?
A) a graduated cylinder
B) a volumetric flask
C) both a and b
D) neither a nor b
C
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Which of the following is NOT something we can learn by determining isotopic ages?
A. the cooling history by using different types of isotopic ages B. the age when a rock is uplifted toward the surface C. the age of material from which clasts in a sedimentary rock were derived D. the age of a volcanic eruption E. We can determine all of these.
One of the world's largest region for producing computer software is
A) Research Triangle Park (NC). B) Emilia-Romagna (Italy). C) Silicon Valley (CA). D) Route 128 (Boston). E) Badden-Wurtenburg (Germany).
The second most important crop in mixed crop and livestock farming is ________
Fill in the blank(s) with correct word
Earth's internal layers, in order from outermost to innermost, are
A. crust, mantle, core. B. core, mantle, crust. C. mantle, crust, core. D. crust, core, mantle.