During the period of 1870-1921, the dominant source of American immigrants was________.
A. East Asia
B. Eastern and Southern Europe
C. Northwestern Europe
D. Latin America
Answer: B
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Which is older - rock unit J or H?
What will be an ideal response?
Pour a liter of water at 40°C into a liter of water at 20°C and the final temperature of the two becomes
A) less than 30°C. B) at or about 30°C. C) more than 30°C.
In the following statements, what are the correct characteristics of Shield Volcanos?
a. They are broad and slightly domed-shaped b. They cover large areas c. Formed after mild eruptions of small volumes of mafic lava d. All of the above e. Both a and b
Organic acids can chemically weather a rock. Where would these acids originate?
A) Decay of granite B) Thermal reaction between water and limestone C) Secretion from and decay of vegetation D) Leaching from the E horizon