The area of conflict between colder and warmer air masses in the subpolar region
A) is termed the polar front.
B) is unrelated to the formation of cyclonic storms.
C) is most distinctive during summer months in each respective hemisphere.
D) is referred to as the subtropical contact zone.
A
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A low-oxygen level in the Gulf of Mexico ________.
A. kills most bottom organisms, is responsible for a decline in Gulf fisheries, and has been linked to excess nutrients supplied by the Mississippi River B. has been linked to excess nutrients supplied by the Mississippi River C. is responsible for a decline in Gulf fisheries D. kills most bottom organisms E. kills most bottom organisms and has been linked to excess nutrients supplied by the Mississippi River
In a metropolitan area, buildings of different heights are a danger to each other because ____
a. ?tall buildings sway slower than lower buildings, allowing them to collide b. ?tall buildings sway faster than lower buildings, allowing them to collide c. ?short buildings are more likely to rupture during vertical motion, making them crumble during lateral motion d. ?tall buildings are more likely to rupture during vertical motion, making them crumble during lateral motion e. ?different building heights resonate with vertical motion at different frequencies and can amplify vibrations
Currently there is extensive recycling of which of the following polymers?
A) high-density polyethylene B) polystyrene C) poly(vinyl chloride) D) none of these
The hypsometric curve shows sea level. What would happen if you raised (lowered) sea level by 1 kilometer?
a) Raising and lowering sea level would inundate or expose about the same amount of the Earth's surface. b) Raising sea level would inundate most of the continental lowlands, but lowering sea level would expose a much smaller area. c) The percentage of land and ocean would remain about the same. d) Both raising and lowering would expose more land. e) Raising sea level by that amount would cover all land, and lowering by the same amount would expose most of the ocean bottom.