What are the three essential chemical elements in the biosphere?
nitrogen, oxygen, and carbon
carbon, oxygen, and helium
oxygen, carbon, and iron
nitrogen, carbon, and hydrogen

Which of the following statements concerning brazil since independence is not true? brazilians today can participate in politics through voting. brazil has been governed by dictators and elected officials. brazil became independent from portugal in 1822. brazil was the first country in the americas to end slavery.

Which of the following was not a characteristic of phoenician cities? a. they were located on islands. b. they had harbors on each side. c. they were built on land jutting out to the sea. d. they were surrounded by high stone walls and towers.

Drag and drop the reasons for widespread discontent around the world in the early 1900s.