Agricultural fields that must constantly be irrigated to sustain a crop especially in semi-arid regions like the American southwest will eventually
A) produce sinkholes.
B) lose most of their minerals and salts.
C) accumulate toxic levels of salts from evaporation.
D) produce soils that will not hold water, leading to desertification.
C
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What is the unit of increase on the Mohs Relative Hardness Scale?
A) An increase of one unit indicates the rock is twice as hard as the one before. B) An increase of one unit indicates the rock is seven times as hard as the one before. C) An increase of one unit indicates the rock is ten times as hard as the one before. D) The scale is variable.
When individuals or governments try to control natural hazards, the most likely result is to ____.?
a. ?trigger a disaster b. ?reduce the effect of the hazard c. ?cause the hazard to move to a different location d. ?have no effect e. ?correctly control the effect
The bulk of ice on Earth is in
A) floating ice shelves and packs. B) European and Asian mountain ranges. C) North America, specifically Alaska. D) Greenland and Antarctica.
These clouds are not precipitating and covers the entire sky, forming a low blanket of clouds that causes overcast conditions. These are
A) stratus.
B) nimbostratus.
C) altostratus.
D) cirrostratus.