Answer: The Lewis and Clark Expedition began in 1804, when President Thomas Jefferson ... with exploring lands west of the Mississippi River that comprised the Louisiana Purchase. The expedition provided new geographic, ecological and social information about previously uncharted areas of North America.
Answer: A) having a population of more than 60,000 free adult males
This is according to Article 5 in the Northwest Ordinance (July 13, 1787) which says
"And, whenever any of the said States shall have sixty thousand free inhabitants therein, such State shall be admitted".
Argentina was a country founded because of the discovery of silver. The name Argentina actually means silver.
The northerners greatly disagreed with the act. The Fugitive Slave Act meant that if a slave ever escaped, he/she could be caught and returned to his/her owner. The northerners were primarily abolitionists, so they strongly disagreed with the Fugitive Slave Act.