Where do severe thunderstorms often occur?
A. near zones of gradual horizontal change in moisture
B. near zones of sharp vertical change in moisture
C. near zones of sharp horizontal change in moisture
D. near zones of gradual vertical change in moisture
Answer: C
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How have humans impaired the ability of the Earth to remove CO2 from the air?
A. clearcutting tropical rain forests B. polluting the ocean C. melting the Arctic ice cap D. planting trees in deserts in Africa
Which statement is not true of the relationship between latitude and ocean characteristics?
A) The temperature in temperate waters is considered to be the most variable. B) Tropical waters are the only regions in which evaporation exceeds precipitation. C) Temperate waters have the largest variation in salinity. D) The polar waters have the lowest average salinity due to the melting of ice.
Why was Indonesia so poor when it gained its independence from the Dutch in 1949?
A) Indonesia had no marketable products. B) Indonesia had accumulated high levels of international debt. C) It suffered several years of drought and famine. D) Civil war drained resources and stifled manufacturing. E) The Dutch had used Indonesia largely for its tropical crops and invested little in transportation, health, or education in Indonesia.
In middle latitude (temperate) oceans, primary productivity is limited by ________ in the fall and by ________ in the spring
A) available sunlight; available sunlight B) available sunlight; nutrient supply C) nutrient supply; available sunlight D) nutrient supply; nutrient supply