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Questions in Grade High-school

[Free] Regarding tropical rainforests, the term evapotranspiration refers to the fact that: A. Deforestation causes a decline in atmospheric oxygen. B. Trees absorb carbon dioxide and "exhale" oxygen. C. The humidity of rainforests can produce local and regional precipitation. D. Deforestation causes a loss of soil fertility due to water evaporation.

[Free] Between 1150 B.C. and 400 A.D, there were a number of civilizations. Which of the following civilizations is the oldest? A. Olmec civilization of Mexico B. Greek civilization of Europe C. Roman civilization of Europe D. Mayan civilization of Mexico and Central America

[Free] Which element is more electronegative, sulfur or nitrogen?

[Free] What is the population of Burj Khalifa?

[Free] Doctors have been looking for a cure for which disease since 1981?

[Free] Which event led the United States to enter World War I on the side of the Allies?

[Free] What was the United States' major concern about their former ally, the Soviet Union? A. That the Soviets would never leave Berlin. B. That the Soviets would never leave Iran. C. That the Soviets would join the United Nations. D. That Soviet-style Communism would take over the world.

[Free] Why was the Farmers' Alliance formed in the 1870s?

[Free] What multiplies to -60 and adds to 7?

[Free] What's \(\frac{3}{10}\) times \(\frac{1}{6}\)?