4. what was a cotton gin? in what industry did factories first develop?

The cotton gin was a machine that made it faster to separate cotton from its seeds.  The cotton industry was the first industry that made the first factory in 1790 based on textile manufacturing from England. The iron industry however was a great leap in mass production using factories. Eli Whitney in 1798 started making interchangeable  parts in rifles.

studies show tha in 7.5 billion years from now, the expanding sun will engulf, and destroy, the earth.

a. favoring native born americans over immigrants.