At what depth do gas bubbles have the most effect on magma?
A. at moderate depths, when the magma is moving rapidly through the conduit
B. at very shallow levels, such as within the volcano
C. when the magma first forms, before the bubbles can dissolve into the magma
D. None of these choices are correct.
Answer: B
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Which of the following is true about young Bolivian migrants?
A) workers are as young as 14 B) Argentina is the destination country C) women work in domestic sector D) all of the above E) none of the above
Which of the following instruments has a dial similar to the one shown in the figure below?
?
A. microbarograph B. Torricelli thermometer C. aneroid barometer D. tipping-bucket rain gauge
One way to study development is by proportion of economic activity in "sectors." The sector concerned with information based services is referred to as
A. primary B. secondary C. tertiary D. quaternary
Pelagic clay deposits are associated with deep marine environments
a. True b. False