At the eastern edge of Russia's European core lie the Caucasus Mountains, which act as a natural divide between Europe and Asia.
a. true
b. false
b. false
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Bottled water is a sustainable alternative to tap water.
Answer the following statement true (T) or false (F)
Which of the following best summarizes how atmospheric concentrations of carbon dioxide change throughout the course of a year?
A. They tend to remain stable. B. They tend to go up and down. C. They tend to keep decreasing. D. They tend to keep increasing.
What physical factor is considered most important for the success of a marine organism?
a. diffusion b. light c. surface-to-volume ratio d. active transport e. osmosis
What is the largest climate modifier in the southern hemisphere?
A) the amount of temperature gradient between the south pole and the equator B) the lack of deserts and dry areas in the southern hemisphere C) the fact that a very large portion of the southern hemisphere's surface area is composed of water D) The jet streams are not as strong and more zonal in the southern hemisphere.