How did years of human sacrifice and paying tribute lead to the downfall of the aztecs

What is walt whitman's poem "when i heard the learn'd astronomer about?

The 1884 amendment added onto the chinese exclusion act included what additional stipulation? the law would apply to ethnic chinese regardless of which asian country they originated from. the law would provide newly arrived chinese immigrants with land in the oklahoma territory. the law would establish all chinese americans as permanent aliens and deny them citizenship. the law would prohibit chinese immigrants from reentering the united states once they exited.

Many young people traveled by train out of the midwest in search of new opportunities during the 1930s. what term is used to describe their actions