The Rise of Oxygen in the Earth's Atmosphere: #9. Jay Kaufman said that while scientists cannot collect and study samples of the ancient atmosphere. they can "collect rocks that were formed... under that atmosphere." why are scientists able to learn about the ancient atmosphere by studying the rocks that came into contact with the ancient atmosphere?

The political, economic, or cultural environment that surrounds an event provides the event with its

Why were chinese american immigrants frequently detained when trying to immigrate through angel island? the rules for immigration were stricter at this checkpoint due to health issues that were prevalent among asian populations at this time. the location of the island was difficult to reach, and ships to the mainland were often prevented from sailing more than once a week. immigration agents were notorious for asking immigrants confusing questions as a means of denying them entry. low wages caused a shortage of immigration officials, so many immigrants had to wait weeks or months before their applications were processed.

Is harry truman considered a hero or a tyrant for dropping the atomic bombs on hiroshima and nagasaki? (need a paragraph)