Which of the following statements about shield volcanoes is correct?
A) They occur in shield areas of Earth.
B) They are subject to violently explosive eruptions.
C) They form from mafic magma.
D) They consist of tremendous quantities of pyroclastics.
C
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Making substitutions of mineral resources can be more efficient than recycling of mineral resources in alleviating the future mineral-resource shortage.
a. true b. false
Large-domain numerical forecast models predict air mass thunderstorms using
A) infrared images. B) spectral representation. C) thermodynamic diagrams. D) parameterizations.
The mixing ratio is the most important of the moisture indices because:
A) it is the ratio of water vapor to a mass of dry air (as opposed to all air). B) it is the ratio of water content to capacity. C) it is the mass of water vapor relative to the mass of all other atmospheric gasses. D) it is the ratio of water vapor to the volume of air involved.
Which of the following is an active continental margin?
A. East coast of Africa B. East coast of the United States C. West coast of the United States D. West coast of Africa