The transcontinental railroad helped to increase the speed at which coast to coast communication was possible. The railroad allowed for materials, people, goods, and messages to be transported more quickly from coast to coast increasing the pace of communication.
Answer for the second
'Released from foreign war, we would probably be plunged into all the misery of anarchy and intestine war. Can we suppose that the people of the south, would submit to having the seat of Empire at Philadelphia, or New England; or that the people oppressed by a change of government, contrasting their misery with their former happy state, would not invite Britain to reassume the sovereignty.” — James Chalmers, Plain Truth, 1776
If the one above is the argument, you might consider that the colonists did obtain independence from England. That by itself was something that Chalmers always thought to be impossible without serious repercussions. He used to say that in the case of achieving freedom, America would just end up being attacked and maybe even colonized by some other country. What happened, thought, was that after the revolution, other countries gained respect for America as an opponent and the country was eventually left to be.
I'd say the Southern colonies because they produced the most cotton.
1. The earth's rotation causes day and night because it exposes certain parts of the earth to the sun as it rotates.
2. The earth rotates 365 days.
3. Saturn's rotation is faster while it's revolution is slower than Earth's.
4. Because the earth rotates from west to east.
6. Water on earth allows most organisms to live.
8. Gravity pulls the moon toward the earth.
Though much has changed, the basic needs of human society have remained constant throughout our history.
