During the last two million years, there have been at least ____________________ warm-cold cycles

Fill in the blank(s) with correct word


20twenty

Environmental & Atmospheric Sciences

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What is considered the "keystone" species of the Antarctic ecosystem?

a. krill b. dinoflagellates c. copepods d. cyanobacteria e. diatoms

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What is the primary conflict in the central Asian "–stan" countries about?

a. Russification b. de-Russification c. quality of life d. routes of oil pipelines e. water

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Of the states below, which has the greatest number of volcanoes (active or inactive)?

A) New York B) Florida C) Arizona D) Louisiana E) Alaska

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A jetty would most likely be constructed to negate the effect of __________ currents.

Fill in the blank(s) with correct word

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