Answer:
Complex Calendars.
Explanation:
The Mayans were one of the first to create calendars, using observatories to take note of the stars and how they "rotated the earth". Using such, they could determine the approximate time as well as seasons.
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Answer:
I think it is B
Explanation:
Southern states that seceded immediately after Lincoln's election in 1860 did so because they had already been planning it in the event of a Republican victory. Their motivation involved what they perceived as a threat to the institution of slavery, which their economy was dependent upon.
Answer:
Arguably, the First Amendment is also the most important to the maintenance of a democratic government. ... The freedoms of speech, press, assembly and the right to petition the government and seek redress of grievances proclaim that citizens have the right to call the government to account.
good luck
Answer: The Manhattan Project was the code name for the American-led effort to develop a functional atomic weapon during World War II.
Explanation: The Manhattan Project was the American program for researching and developing the first atomic bombs. The weapons produced were based solely upon the principles of nuclear fission of uranium 235 and plutonium 239, chain reactions liberating immense amounts of destructive heat energy.
