Whales evolved from land-dwelling ancestors. Indicate whether the statement is true or false
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Midocean ridges form where two ocean plates
A) Collide. B) Diverge. C) Subduct. D) Slide past each other. E) Are destroyed.
When a volume of air is compressed, its temperature
A) increases. B) decreases. C) neither increases nor decreases.
Which of the following is NOT one of the reasons why the study of population geography is especially important?
A) More people are alive at this time than at any other time in history. B) The world's population has increased at a faster rate during the second half of the twentieth century than ever before in history. C) Overpopulation is a threat in every country on the planet. D) Virtually all global population growth is concentrated in developing countries. E) The rate of growth has slowed in the twenty-first century but is still high by historical standards.
Atoms with either a positive or negative charge are called
A. isotopes B. compounds C. ions D. elements