Which biome has been degraded the most by humans?
A) tropical rain forest
B) tundra
C) temperate grasslands
D) desert
E) savannas
C
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In contrast to the first two agricultural revolutions, the third one originated in the
A) New World. B) Old World. C) core. D) periphery. E) laboratory.
When speed divergence occurs in the upper atmosphere, what effect does it have on cyclogenesis?
A) It inhibits cyclogenesis by preventing cyclonic flow. B) It greatly enhances cyclogenesis by increasing convergence on the surface below. C) It has no impact whatsoever on the formation of mid-latitude cyclones. D) It can either inhibit or enhance cyclogenesis, depending on the surface air temperature.
In science, an educated guess is called a
A) hypothesis. B) theory. C) both of the above
If magma or lava cools quickly, the resulting igneous rock will have ________
A) very large crystals B) very small crystals C) more variations in mineral types D) more silicate minerals