The average warming experienced over the globe since the early 1900s has not been uniform. Where have the greatest and least amounts of warming occurred?
The greatest warming has occurred in the arctic and over mid-latitude continents, whereas oceans in the Southern Hemisphere and parts of Antarctica have not warmed since the early 1900s.
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What is a frustule?
A) The by-product of photosynthesis in diatoms B) The rigid cell wall of a diatom C) A microscopic phage that attacks diatoms D) None of these choices
The hunting and killing of wildlife by local people in a tropical rain forest is an example of
A) the consumptive use of a natural resource. B) the productive use of a natural resource. C) the maximum sustainable yield of a resource. D) the carrying capacity of a population.
Compared to traditional tillage, conservation tillage ____.
A. reduces topsoil erosion B. accelerates water loss from the soil C. causes soil compaction D. does not require herbicides E. reduces the amount of carbon stored in the ground
Which of the following changes in conditions indicates heating of the rock?
A. from D to A B. from A to B C. from B to C D. from C to D E. None of these choices are correct.