Earth's atmosphere is 78% nitrogen, 21% oxygen, the rest 1 percent with very small percentages of other elements like Co2.
There's many answers for this question, as long as it's a similar word to disbelief. President Roosevelt's reaction was pretty much thinking, "This is unbelievable." So therefore, you can put disbelief or distrust.
I will give my best shot. I think they justified their reason to conquer the Aztec and Inca Empires in the name of their religion, christianity
African Americans couldn't get education and if they did the budget was really low