Which gas was not present in the early atmosphere of Earth when it formed and the crust was still forming? O carbon dioxide
O hydrogen
O helium
O oxygen

Which of the following is one example of an ideological conflict that became one of the causes of world war ii?

Plz which of the following statements about spanish plantations is not accurate? a. spanish plantations grew sugarcane for export to spain b. the spanish had little concerned for the lives of the indians who worked on the plantations. c. spanish plantations grew wide variety of crops and center produce to many different european countries. d. to replace the native americans our dying off the spanish imported african slaves.

What was the compromise that allowed california to be admitted to the union