En el planeta tierra distinguimos las siguientes capas​

What is walt whitman's poem "when i heard the learn'd astronomer about?

The service industry in the united states grew in the late 1800s. what was one effect of that growth? the number of people with jobs in factories as unskilled workers decreased. the number of people with jobs in factories as unskilled workers increased. the middle class grew as people took jobs as clerks, lawyers, and teachers. the middle class shrank as people left jobs as clerks, lawyers, and teachers.

Andrew jackson: a) successfuly captured montreal from the british in 1813 b) was the american general at the battle of new orleans c) represented the u. s in the peace negotiations of ghent, belgium d) all of the above