Hurricanes generally need water temperatures of what value to form?
A) 75 degrees F
B) 81 degrees F
C) 86 degrees F
D) 90 degrees F
Answer: B
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A community of different organisms interacting with one another and with their nonliving environment of soil, water, and other forms of matter is called
A. a species. B. an ecosystem. C. a population. D. a lithosphere. E. a community.
A flower pot rests on a table. If the action force is Earth pulling downward on the pot, the reaction force is the
A. pot pulling upward on both the table and Earth. B. table pushing upward on the pot. C. pot pulling upward on Earth. D. none of the above
In stage 1 of the demographic transition
A. both birth and death rates were high B. birth rates were high but death rates were low C. both birth and death rates were low D. death rates were high but birth rates were low
Which of the following should have the steepest pressure gradient?
A) tornado B) middle-latitude cyclone C) typhoon D) hurricane