Rocks are always composed of more than one type of mineral
Indicate whether the statement is true or false
False
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From a biodiversity perspective, which is the greater concern with regard to siltation and reservoirs in the Colorado River Basin?
A. Downstream silt losses have impaired the coastal delta wetlands B. The lake might become too silted to produce electricity C. Lowered water capacity may impair agricultural production D. Lowered water capacity may result in people moving away
In modern world trade,
A) some places are still completely isolated and dependent on local resources. B) all parts of the world have eagerly, voluntarily participated in world trade. C) virtually all peoples have moved from self-sufficiency and cultural isolation to trade and cultural exchange. D) all trade is regulated by the United Nations.
The major goal of the U.S. earthquake hazard reduction program is to
A) develop an earthquake warning system for southern California B) reduce earthquake hazards through understanding of risks and prediction of hazards C) federally enforce seismic building codes in active areas D) determine the roots of human perceptions of earthquakes
What geologic event is probably indicated by this irregular coast, with estuaries?
A. a drop in sea level B. erosion due to large tsunamis C. the uplift of submarine canyons D. a rise in sea level